MXPA00003203A - Systems and methods for remotely controlling a machine - Google Patents

Abstract

Systems (20) and methods, including modem (40, 60) communications software, for controlling and/or monitoring one or more machines (22, 24, 26) having a control board (30), such as, for example, compressors (22, 24, 26), from a remote location (28) is disclosed. The systems (20) and methods provide for each machine (22, 24, 26)being controlled and/or monitored by an operator from the remote location (28). The machines (22, 24, 26) are controlled and/or monitored using the modem (40, 60) communications software, presently preferably, resident on a personal computer (PC) (50) at the remote location (28). The methods and systems (20), including the modem (40, 60) communications software, provide communications between the PC (50) and the machine(s) (22, 24, 26) through transmissions over a communications link established through a modem (40) from a remote PC (50) to a modem (60) connected to the control board (30) of a machine (22, 24, 26) to provide instructions to or receive information from the machine control board (30) and for the remote diagnosis of operating problems, such as, for example, compressor system (20) operating problems, among other features.

Description

SYSTEMS AND METHODS FOR REMOTELY CONTROLLING ONA MACHINE DESCRIPTION OF? A? Nv? NTION This application is a continuation in part of the Application for ^ Patent - U.S. Patent No. 3 of November 1994, al., And a continuation in part of the US Provisional Patent Application Serial No. 60 / 060,650 filed October 1, 1997, commonly owned by Centers et al., the description of each is incorporated herein by reference. The present application is generally related to systems and methods for remotely controlling and / or monitoring one or more machines, usually compressors, in such a way that each machine control system can be evaluated by an operator from a remote location or communications software. by modem, currently pre resident on a personal computer (PC) in the remote. More specifically, it is related to systems and methods for remote diagnosis of compressor system operation problems. More specifically, it relates to systems and methods for providing communications over transmissions over a communication link established through a modem from a remote PC to a modem connected to the electronic control system of a compressor to provide instructions to / or receive information. of the electronic control system of the compressor. Rotary screw compressors, such as the compressor described in U.S. Patent No. 4,435,139, have long been used to provide compressed air in the industry. The rotary screw compressor typically comprises two rotors mounted in a work space bounded by two end walls and a cylinder wall extending therebetween. The cylinder wall takes the form of two intersecting cylinders, each housing one of the rotors. Each rotor is provided with helically extended propellers and slots that mesh to establish compression chambers with a curved configuration. In these chambers, a gaseous fluid is displaced and compressed from an inlet channel to an outlet channel by means of the screw compressor. Each compression chamber during a filling phase communicates with the inlet, during a compression phase undergoes a continuous volume reduction, and during a discharge phase communicates with an outlet. Rotary screw compressors of this type are very often provided with valves to regulate the integrated volume ratio of the compressor capacity. When continuous regulation is required, slide valves are very often used, however, with other regulation needs, it is sufficient to use .7i ± deflection valves. Said diverter valves are mounted on the cylinder wall of the compressor or can be mounted on one of the end walls and in this respect, normally on the high pressure end wall. A deflection valve arrangement of this general type is shown in US Patent No. 4,453,900 issued June 12, 1984. However, the opening of the deflection valve depends directly on the compression spring as well as the internal pressure of the valve. compressor. The opening and closing of this type of valve is not reliable due to friction, corrosion and other environmental factors that very often derogate the placement of this type of bypass valve. Further, while the face of the valve member takes the approximate configuration of the cylinder, the valve member is separately formed by a casting process or other process within the predetermined tolerances. In order to economically manufacture such valve elements, the tolerances must be somewhat relaxed which can result in the leakage of the pressurized fluid between compression chambers therewith, degrading the efficiency of the compressor. It is known that these compressors can be controlled by electronic circuits, such as those described in U.S. Patents 4,336,001 and 4,227,862 of Andrew at al., Which show electronically controlled start and shutdown routines and the control of a bypass slide valve for vary the output of the compressor to maintain the pressure at a selected point. U.S. Patent 4,519,748, 4,516,914, and 4,548,549 to Muyrphy et al., And US Patent 4,609,329 to Pillis et al., Show additional electronic control systems for compressors. However, the operating modes of these systems are mainly designed for refrigerant compression. US Pat. No. 4,502,842 to Curper et al., Assigned to Colt Industries Operating Corp., shows a single electronic control system which can be connected to control a plurality of compressors of variable size. The system provides data on the operating characteristics of the compressors controlled during a calibration phase and then uses this information to charge and discharge the compressors during the operation, maintaining a preset pressure which can be programmed to vary with time. Set points of high and low pressure are programmed into the electronic control system and the compressors are selectively charged and discharged in a predetermined sequence. However, centralized master controllers of this type represent a single point of lalla for the entire pressurized air system, and lack versatility as they provide only a limited selection of control modes. US Pat. No. 4,335,582 to Shaw et al., Teaches a system for discharging a screw compressor in a refrigeration system. A slide valve that is connected so that when the compressor is turned off, the slide valve automatically activates to a full discharge position. This operation is achieved with an air compression instead of an electronic control system. None of the electronic control systems described above provides a complete and versatile solution to the maintenance and control problems experienced when operating one or more compressors on a variety of installation equipment with a variety of air storage capacities. In fact, the network capabilities and actions of modes of operation in the prior art systems described above, and the ability of the control systems to provide monitoring of reliable real-time remote and local operation parameters and parameter settings of Remote real-time operation to respond to the current operating conditions are quite limited. Compressed air is a fundamental source of energy required in most industrial manufacturing facilities. The maintenance schedule and the location of the compressors that provide the compressed air usually has not been well thought out. The compressor is usually located in a dark corner of the facility or in some remote building. The maintenance, in many cases, is only carried out on the compressor if the air pressure in the installations starts to fall. Thus, a significant problem with almost all air compressor installations is the ease of monitoring the compressor to determine when and what type of maintenance needs to be performed. Another significant problem with almost all air compressor installations is the need for a local operator to monitor the compressor and enter control commands into the electronic control system of the compressor. A possible approach to eliminate the monitoring, control and maintenance of compressed air equipment is to have a distributor that provides a compressed air system of equipment fully installed to the installation and assume all responsibilities for maintenance, control and monitoring thereof. When installing a compressed air system of easily installed equipment, local equipment management will provide full responsibility for compressed air to the distributor including maintenance, operational control and daily monitoring of the installation's compressed air system. However, at least there is some way to monitor and control compressors in the compressed air system of the installation from a remote location, a distributor would have to hire personnel to be in place with the compressors 24 hours a day, 7 days a week. This constant present would be costly and could result in the assumption that said responsibility of the compressed air system of the installation by the distributor would be prohibitive in terms of costs. Therefore, it would be desirable to develop systems and methods to remotely monitor and control the operation of an installation compressed air system so that the personnel does not need to be in place along with the compressors 24 hours a day, 7 days a week. In situations, such as, for example, in missile launching platforms, where it is impractical and impossible to have a localized operator with the compressors to monitor the installation of the compressor and to enter control commands into the electronic control system of the compressor, it is vital importance for launch officers to know if the source of compressed air at each launch pad is running or available to run during the launch process, if necessary.

Typically, a number of backup compressors are placed on each launch pad which can provide compressed air in the event of failure of one or more compressors. Even with this backup system, the missile launch officers recognize that being able to remotely monitor and control the operating conditions of the air compressor system would be beneficial, since not knowing the exact listing of any of the compressors in A particularly critical time can provide a risk to processing. Thus, in these types of situations, it would be desirable to be able to remotely monitor these types of compressor systems to determine if the compressors are running or if they are available to run and remotely control the operating status of each compressor in order to react to time to any compressor shutdown not determined or any other potentially critical case. Thus, there is a need for systems and methods to control the compressors of a compressed air system from a remote location. Such systems and methods must have a communications capability to communicate between the compressed air system and the remote location. Such systems and methods should provide real-time monitoring and control of compressors of the compressed air system from the remote location. Such systems and methods should provide improved monitoring of real-time operating parameters and real-time operation parameter settings to control compressor operations without the need for dedicated compressor technical personnel in place with the compressors. It is a principal object of the present application to provide systems and methods for remote access to a network of electronic compressor control systems. Another object of the present application is to provide systems and methods for remote access to a network of electronic compressor control systems to allow monitoring through a link to a single system in the network. Still another object of the present invention is to provide systems and methods for remote access to a network of electronic compressor control systems to allow the control of one or all of the compressors in the network through a link to a single system of the net. Another object in the present application is to provide systems and methods for remote access to a network of electronic compressor control systems to allow the diagnosis of one or all of the compressors in the network through a link to a single system in the network. Still another object in the present application is to provide systems and methods for remote access to a network of electronic compressor control systems to allow upgrading by wired microprogramming of any electronic control system of one or all of the compressors in the network through from a link to a single system in the network. Another object of the present application is to provide systems and methods for controlling the compressors of an installation compressed air system from a remote location. Still another object of the present application is to provide systems and methods for communications between installation compressed air systems and the remote location. A further object of the present application is to provide systems and methods for real-time control and monitoring of the compressors in the compressed air system of the installation from a remote location. Still another object of the present application is to provide systems and methods for monitoring real-time operation parameters and real-time operation parameter settings to control compressor operations without the need for dedicated compressor technical personnel in place . In accordance with these and other additional objects, one aspect of the present application includes a system for remotely controlling at least one machine, the system comprising: at least one computer having a desired computer program of communications by modem that is operatively programmed within this; at least a first modem that operates connected to the computer; and at least one machine having at least one control board that operates connected thereto, the computer is located in a remote location of at least one machine; at least one second modem operates connected to the control board for communication with at least the first modem; and media, which operate by connecting the first and at least the second modem, to transfer the data in both directions between at least one control board and at least one computer. Yet another aspect of the present application includes a system for remotely controlling at least one machine, the system comprising: at least one computer having a computer program of modem communication factors that is operatively programmed within it; at least a first modem that operates connected to the computer; a plurality of machines, each machine has a control board operatively connected to it, the computer is located at a remote site of the machines; network means for operatively connecting the control boards of the plurality of machines to each other; and means of communication, operatively connected at least the first and at least the second modem to enter and exit data in both directions between at least one control board and at least one computer. Yet another aspect of the present application includes a method for remotely controlling at least one machine, the method comprising the steps of: providing at least one computer having a modem communications software computer program operatively programmed therein, operatively connect at least a first modem to the computer; providing at least one machine having at least one control board operatively connected thereto, the machine is located remotely from the computer; operatively connect a second modem to the control board; and operatively connecting at least the first and at least the second modem in such a way that data is transferred between at least one control board and at least one computer in both directions. Other objects and advantages of the application will be obvious from the following description, the accompanying drawings and the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic block diagram showing a network and remote communication configurations using the compression control system of the present invention; Figure 2 is a schematic block diagram showing the electrical control elements in a preferred embodiment of an electronic control system, 5 connected to a modem; and Figures 3-18 are flow charts illustrating the different operational routines of the modem communications software used with the systems and methods of the present invention. As shown in Figures 1 and 2, the present application is directed to systems and methods for monitoring and / or controlling, from a remote location, one or more compressors or machines, 22, 24, ¿5, each compressor It has parameters associated with them. The systems and methods of the present application for remotely evaluating one or a network of compressors include an electronic control system, a microprocessor board, or a control board 30 operatively connected to one or more compressors and electronic communication devices 32 such as a modem operatively connected to the control board 30, it being understood that each compressor in the network has its own control board 30. The electronic control system or the control board 30 is in communication with the modem 32 and other control boards 30 to each compressor 22, 24, 26. The control board 30 includes logical means and a memory. & B The logical means are for ascertaining certain parameters of the compressor, storing the parameters in the memory, transmitting at least certain of the parameters to the modem 32 in response to a request from another modem 40 generated by a modem communications software resident in a computer (PC) 50. The modem 32 is effective to transmit the request of the remote PC to the control board 30, receiving the parameters of the control board 30, and transmitting the parameters to deploy them in the remote location. As described in U.S. Patent 5,713,724, the modem 32 may be installed in the housing of the compressor control board 30 (not shown) or may be a separate component. A network connection 54 provides a network interface connection for linking multiple control boards 30 to a potential compressor location, such as, for example, a linked compression location 52. Preferably, the network connection 54 provides a network interface of equal to the same ARCnet standard. As also described in the Patent No. 5,713,714, the control board or microprocessor 30 is provided with a serial interface for connecting to the modem 32, which may be a conventional cable line telephone modem. The modem 32 allows communication between the control board 30 and the remotely located stations for the purpose of real-time operational control, monitoring, maintenance and service diagnostics, transmitting status reports, and downloading wired microprogramming of operation for the board. of control of the PC 50 in the remote 28 place. In a modem mode of operation, the control board 30 may be called by a telephone line 44 from the remotely located PC 50. When a connection is made, the remote PC 50 can access all the information of the control board 30 that can be seen by a local operator. All operating parameters, service information, and shutdown registers stored in the control board 30 are transmitted to the remote PC 50. All sensor input information, including detected temperatures and pressures, are transmitted to the PC based on real time. The information displayed for the operator of the control board 30 is also displayed on the remote PC 50. All the stored operating parameters of the control board 30 can be modified by the operator of the PC 50 through transmissions over the link established through the modem 32. In addition, the control board 30 can receive a message from the PC 50 and display the message in a deployment to provide instructions or information to the local operator. This feature is particularly useful for remote diagnosis of system operation problems. In addition, new wired control microprocessing can discharge control board 30 from the remote PC 50, and store in a flash memory provided for that purpose in the 30 microprocessor board. To cause entry into a wired microprocessing discharge mode, a local operator must lock the control board 30, and hold the F3 button in a range of switches (see US Patent No. 5,713,724) while feeding the board 30 of control. During and after the process of downloading the wired microprogramming, the control board 30 is also programmed to perform integral verifications in the discharged wired microprogramming, such as byte-by-byte verification and / or verification of the checksum, to ensure the integrity of the new wired microprogramming before allowing the restart of compressors 22, 24 and 26. A local RS232 port will also be provided as part of the microprocessor board or control board 30, as described in US Patent No. 5,713,724 with reference to Figure 5. This local port RS232 can be used to connect the control board 30 to the local PC (not shown). The control board 30 will provide the same functionality of updating the wired microprogram, monitoring and control by means of the RS323 local port, the only difference is that the PC will be directly connected to the control board 30 instead of connected via modem 32. The updates of wired microprogramming can be transmitted from a station remotely located at the system manufacturer or at a maintenance center, the system 30 is equipped with a modem 32, as described above. The microprogram storage storage chips wired in the system can be, for example, AT 29C010-12PC 12oK x 8 flash EEPROMs with an access time of 120 nanoseconds. The random access memory chips are currently SRM20100LC100 preferentially, low energy 128K x 8 static RAM integrated circuits with an access time of 100 ns, which provide more memory than is used in current mode, leaving space for an expansion Future of system functions. If desired, the 32K x 8 RAM chips can be replaced since a smaller amount of memory is sufficient for the operation of the embodiment described herein. Figure 1 is a schematic block diagram showing network and remote communications configurations of a linked compressor system 52. In Figure 1, a plurality of systems 22, 24, 26 etc. of compressors is shown in a network configuration, connected by the network cabling 54. The network cabling 54 connects the compressors 22, 24, 26 in a multi-terminal configuration according to the EIA RS-485 standard and transports the information between the compressor 22, 24, 26 using the standard ARCnet protocol. To allow remote monitoring and control of the linked compressor system 52, one of the compressors, such as, for example, 22 is connected to the modem 32 which is connected, preferably currently, to a conventional telephone switch. Each telephone switch is connected to, preferably currently, a conventional telephone system which provides a conventional telephone line 44 connection to the remotely located PC 50. The modem 40 operates to transfer the information from the PC 50 and to receive commands and control signals from the PC 50 in the manner described above with reference to Figure 2. When a plurality of compressors 22, 24, 26 are connected in a network, as shown in Figure 1, the commands received via modem 32 by the compressor 22 connected to the modem 32 can be transmitted over the network 54 to the other compressors 24, 26 in order to provide the remote control, via the modems 40, 32 of all the functions of all the compressors in the network 52. The modem 32 allows a remote monitoring of the TS Operation of the compressors to diagnose service problems, allowing a maintenance man to be better prepared to fix the problem before leaving the workshop, remote monitoring and data removal can also be used to optimize the operational control of the compressor. The data is stored in control board 30 and can be removed for tuning or evaluation of loading and unloading pressures, auto / dual out time values and multiple compression settings, as described in US Patent No. 5,713,724 . In addition, the parameters of the compressors can be configured and reconfigured in real time from the remote location. After examining the data transmitted by the compressor system 52, the remote operator can adjust the appropriate operating parameters to improve the operation of the compressor. Finally, if any microprogramming problem is encountered wired in the field, the only combination of this modem link and the flash memory provided on the control board 30 allows updating of the wired microprogramming of the system on the control board 30 immediately without the need for a service call in the place. In addition, the features of the systems and methods of the present application provide the addition of any special wired microprogramming option not originally installed on the compressor control board 30, as desired, without a site visit. Of course, the above-described uses of the modem 32 are not limited to network operation, and a modem 60 can be provided in a separate compressor system 62 to perform these same functions for an independent system. The operation of the wired control microprogram in a microprocessor board or control board 30 provides significant advantages. While the operation of this wired microprogramming is described in detail in the flowcharts and source code documented in the microfiche appendix of U.S. Patent No. 5,713,724 the selected operating characteristics will be briefly described herein for the convenience of the reader. A significant advantage of the control board 30 is the ability to regulate the pressure output of the compressors on any of the four sides of pressure regulation operation, under the control of an operator, depending on the requirements of the particular installation currently. In addition, several other control features are available from the operation menus of the installation air system. For example, the vertical movement valve operation can be selectively deactivated through a layout menu, or via a command received from the remote station 28 through the modem 32 and / or the network connections 54 of the air system. installation . The first three modes of operation are modes of a single machine, wherein the compressor system 62 operates substantially independently of any other compressor in the same place. The fourth mode of operation is a linked machine operation mode, wherein the compressor 22 communicates with other compressors 24, 26 having the same control board model 30 and feeding the same service air system, and coordinates the operation of the compressor 22 with that of the other compressors 24, 26 to maintain a desired compression in the installation air system. As previously indicated, in addition to the three modes of operation of a single machine described above, the control board 30 can operate in a multiple linked machine mode. In Network Mode, all compressors 22, 24, 26 transmit information to all other compressors specifying their capacity and specifications, configuration, maintenance status, current load setting including the activation condition of each of the compressor valves and current line pressure in their air connections' respective installation.

Each compressor control board 30 stores the information received from the other linked compressors and coordinates operations based on this information around the linked installation air system 52. Each linked control board 30 is an example of the other control boards of the compressors in the network, such that there is not a single control board 30 that serves as the main control unit. Since each control board 30 constantly maintains full information about the status of the network and controls its own operation based on the data received from all linked compressors, a failure in any particular compressor will not prevent the operation of the continuous network. The failure of a control board and a compressor to communicate with the other linked control boards will result in an automatic configuration of the network to operate without that particular compressor. To operate in the network mode, the control board 30 of each system 22, 24, 26 of the compressor automatically identifies itself with the other compressors in the network based on a predetermined code, such as, for example, a letter code A , B, C, D, ... P, assigned by an operator during the installation of the compressor system and stored in a non-volatile memory. This code of letters is assigned by the operator for purposes of prioritizing the operation of the machine, as will be explained in detail in the following.

When starting a compressor 22 or more compressors 24, 26 the network 52 is automatically configured dynamically by assigning a number of unique network nodes to each compressor control board 30 for network communication purposes. This automatic configuration of the network occurs without regard to the order of start of the compressors, and the control board systems 30 automatically linked determine the total number of compressors in the network. If a compressor is added or removed from the network, it is not necessary for the operator to change the total of compressors stored in the compressor control boards. The control boards 30 connected continuously maintain and exchange operation status information, and each compressor maintains full operation status information on all other compressors in the network. This information preferably includes, for example, if the compressor is running or stopped, and if it is stopped, if the shutdown was the result of a programmed shutdown such as a manual shutdown, safety shutdown or timeout or other cause; if the vertical movement valve algorithm is enabled or disabled, the status of vertical movement valves (open or closed); the current line pressure of the compressors and the collector pressure; the discharge temperature and the collector temperature; the pressure and discharge settings of the compressors; the model number, capacity, horsepower, and system voltage; if the compressor is cooled by air or by water, the state of the delta pressure switch of the oil filter; the state of the delta pressure switch of the air cleaner; the state of the motor overload regulators; the state of the auxiliary contacts of the main motor start; the total hours of the air filter, oil filter and separator element; the total hours of the compressor loaded and unloaded; number of minutes discharged until the compressor shuts off (current auto / dual stopwatch value), compressor node number; "and number of hours remaining on the compressor's multiple machine timer." Also, additional special-purpose sensors, such as an airflow sensor, can be connected to any particular compressor in the network, using the input expansion provisions. of the control board 30, as described in U.S. Patent No. 5,713,724 with reference to Figure 5, and all compressors in the network can receive sensor readings from a single sensor, instead of providing separate sensors for each compressor. The storage of all this information in each compressor control board and the capacity provided to transmit this information through the network and to remote locations using the modem 32 provides the monitoring and control and coordination operations of multiple compressors that are significantly advanced. on the known prior art systems. The maintenance on each state compressor control board 30 and updated configuration information on each other linked compression system is another advantage of the systems and methods of the present application, in case where the modem 32 is connected to any of the systems 22, 24, 26 of linked compressor (as shown in Figure 1). Under these circumstances, the status information of all linked compressors 22, 24, 26 can be transmitted by that system 52 linked to the remotely located station 28 for real-time monitoring and control purposes. When the network is established, the operator assigns each compressor system 22, 24, 26 in the network 52 a unique sequence identifier such as A, B, C, D, etc. which is used to sequence and program the compressors in the network. The term "sequencing" refers to the order in which the linked compressors will be brought online or offline to meet the demands of the system. The term "schedule" refers to the time and day that a particular sequence will be used. Preferably, the control board 30 may store a plurality of sequences together with day and time specifications, and may use the specified sequences at the specified times on the specified days. The objective of proper programming is to assign a sequence to a particular time that ensures that the compressors that are running operate as close to a total load as possible. The number of sequences used in a linked system 52 depends on several factors. One factor is the preference of the operator. The control board 30 is provided with an omission sequence (alphabetical start with "A") and will always run this sequence unless an operator specifies the programming of different skip sequences. Linked systems will work well with only one frequency. Linked systems that use multiples of an identical compressor model can use only one sequence or can use the same number of different sequences since they are machines in the network, thereby equalizing the hours of operation on all compressors. Before ordering an installation air compressor system, in order to optimize energy savings, a study of installation air capacity needs to be conducted and compressor programming should be planned as part of the process of dimensional compressors in the compressor network. In this way, suitably sized compressors can be ordered to supply different demands of the installation air system using the minimum amount of energy. The Network Control Mode is used with a plurality of compressor systems 22, 24, 26 connected to a single service installation air system as described with reference to Figure 8 in U.S. Patent No. 5,713,724. Like the target pressure mode of a single machine described above, the network mode uses an operator that can be adjusted to the target pressure as a basis for controlling the response of all compressor systems 22, 24, 26 to change the demand of the service installation air system. In this mode, the control boards 30 connected in the network 52 pass through an operation indicator, which is different from the communication transmission mark, and only the machine having the operation indicator can take action to adjust its capacity. of exit. A sequence to start the compressors connected as demand increments is programmed into at least one of the connected compressors (unless the omission sequence A is desired), B, C, ... P, in which case no programming is necessary) and transmitted to the other compressors in the system. The operation indicator is held by the compressor system which is the next to have the capacity increase in response to an increase in demand, according to the programmed sequence. When the compressor system that has the indicator is running at full capacity, it passes the "to the right" indicator, that is, to the next compressor in the sequence. If the demand drops and the compressor system holding the indicator has reduced its capacity to 50% by activating the capacity reduction valves, it passes the indicator to the system that follows the programmed sequence. If an additional capacity reduction is required, the compressor system that receives the indicator will then sequentially activate its capacity reduction valves until it has opened the four vertical movement valves and reduced its capacity by 50%, at which point the indicator "to the left", that is, to the next compressor system in the programmed sequence. With the compressor system at full load, that is, all connected compressors operating at their maximum output, an increase in operating air pressure above the target pressure indicates a decrease in demand. The control board 30 of the last machine in the sequence, which has the indicator, will respond by opening the first valve of the last machine in the sequence. If the pressure remains above or moves above the target pressure one more time, the control will open the additional valves on the last machine to maintain the target pressure. If all the valves in the last machine open and the service air pressure is still above the target pressure, that machine will continue running at 50% of its capacity and the indicator will be passed to the "left" to the preceding compressor in the sequence, which will begin to open its valves as necessary to reduce the air pressure of the service facility. Referring now to Figure 2, a serial port 70 is included in a control board 30 associated with a compressor to provide communications with other devices. It is possible to connect a standard external modem designed for use with a personal computer to this port 70 using a serial modem cable. With an external modem 32 connected to the control board 30, the PC 50 equipped with the modem 40 can transmit and receive information through the standard telephone lines 44 to a compressor 62 or a compressor 22 linked in the compressor network 52. Due to the amount of possible compressor control with the systems and methods of the present application, security to prevent unauthorized access of the compressor 62 through the modem 60 or the compressors 52 linked through the modem 32 can be provided. In the systems and methods of the present application, two levels of security have been implemented. The first level of security is provided by a software lock key (not shown) manufactured by Aladdin Knowledge Systems Inc. This level of security prevents anyone from installing or using the modem communications software useful with the present application on a PC without the key of 5 software lock. The software block key is a hardware device that plugs into the port of the printer on a PC. The second security level uses the serial number of at least one of the linked compressors.

When a compressor controlled by the control board 30 is configured to transport it to a customer, part of the production establishment for the compression system is to register the serial number of the control on the control board 30. When the modem communications software used with the present application, is ordered, the serial number of the compressors with which communications by modem will be making communications, are embedded within the modem communications software in a flexible magnetic disk that is delivered to the end user. When the communications software that runs on the PC 50 makes contact with the compressor 22, one of the first things that will happen is a request for the serial numbers of the compressors. If the serial number can not be obtained or does not match the authorized serial numbers, the software communications by modem interrupts communication z "r- * i * => -> _ electronics with the modem 32 immediately With the modem communications software installed on a PC, an operator can monitor each compressor 22, 24, 26 in a compressor network 52 of a single modem 32 connected to one of the compressors 22. The control board 30 currently allows up to sixteen (16) compressors that can be linked in. The modem communications software used with the systems and methods of the present application is capable of withdraw all available information on control board 30. This information includes, but is not limited to, hours in Charge operation, hours in Discharge operation, hours of Air filter, hours of Fluid filter, hours of Element Separator Also, the indicators show the condition of the Air filter, Fluid filter, and Separator element.Compressor status, loaded or unloaded, is displayed by the PC 50 at a remote location. a, the reason for the shutdown is displayed at the remote location. If the compressor is running, then the operation mode, Continue run, Auto-Dual, or Network mode is displayed by the PC in the remote location. If the compressor is running, then the number of capacity reduction valves known as vertical operation valves that are open are deployed by the PC 50 in a remote location. If the compressor is running in Network mode, the status of the Network indicator is displayed by the PC in the remote location. The Network indicator is a software flag that is used in the Network operation mode to determine which compressor in a compressor network is capable of making capacity adjustments. Load and Unload pressure establishments for the compressor are deployed by the PC in the remote location. If the compressor is running in Network mode, then the percentage of the Network capacity and the horsepower used are deployed by the PC in the remote location. If the compressor is running in Network mode, the total capacity and horsepower of the network being used are deployed by the PC in the remote location. Also if the compressor is running in Network mode the average network pressure is displayed by the PC in the remote location. This deployment represents the average of the local pressures of all the compressors that are running on the network. The serial number, model, calculated capacity, calculated horsepower, type of machine, type of ignition, and number of software version of the compressor being monitored are displayed by the PC in the remote location. Collector and discharge temperatures and pressures are displayed as they appear in the compressor being monitored. All this information for each compressor in a Network can be viewed and printed, if desired, by the PC in the remote location. Each compressor control board 30 maintains a log of any shutdown that its compressors may have experienced. The type of shutdown as well as the shutdown time and date is recorded on a non-volatile memory chip in the control board 30. The PC 50 that has the modem communications software operating in it to which the modem 32 joins can access this shutdown log for a single compressor or any compressor in a Network, and display the compressor shutdown history, save it in a file, or print it in the remote location. Whenever the PC 50 communicates with a single compressor 62 or a network of compressors 22, 24, 26, the modem communications software installed in the PC collects the data of all the active compressors that can be accessed through the modem 60, 32 in the place of the compressor. The number of compressors in the place of the compressor that are in the network to the modem 32 will determine how often the data of each compressor is withdrawn. Typically, these operating data are obtained in a range of each compressor ranging from about 5 to about 20 seconds. A data log file is created on PC 50 for all, currently and preferably sixteen (16) possible compressors that can be together in the network. If any of these compressors is active, then the data is recorded in the log file for that compressor. This data contains information that includes, but is not limited to, Discharge Temperature, Discharge Pressure, Average Network Pressure, Percentage of CFM used, Percentage of Horsepower used, Percentage of Total Linked Force Horses used, Percentage of Total Linked CFM used. The Time and Date data are recorded by the PC together with this data so that the data can form graphs and can be displayed on the PC 50 that operates the communications software or other software for displaying graphics, such as, for example, excel or equivalent. The data in the graphs appear with the X axis of O at 24 hours and the Y axis established for the appropriate scale and range to fit the data. This data in graphics can also be printed in the place of the PC, if it is required. With these data recorded over a period of time, a good sequence and custom schedule for a compressor network can be developed. Each compressor in a compressor network has a unique identity. This identity can be selected by the user at the time of installation. In such a way that the sequence is the order of identities of the compressors with which the Network will operate. The control board 30 currently allows up to nine (9) sequences that can be used. The schedule is the day of the week and the time of day that a sequence will be used in the Network of the compressors. The current control board 30 and preferably, allows a repetition of a 7-day schedule with 9 different time slots for each day. With the modem communications software installed on the PC 50, the monitoring and remote control of a linked compression installation air system can include the modification of the sequence and programming information. This can be achieved by removing the programming sequence information from any compressor in a compressor Network 52 using the modem communications software installed in the PC 50 to the modem 32. The sequence and programming can then be saved and / or modified in the PC 50 and then retransmitted back to the compressor Network 52 through the modem 40 and the modem 32 to the control board 30. By using the modem communications software in the present application installed on a PC, the compressors in the Network 52 can be selectively discharged and deactivated simply by establishing a sequence that does not include the compressors and programming this sequence for a day and time of the week in which said compressor shutdown is desired. When that scheduled day and time are reached, any compressor that is not included in the sequence instruction is turned off and is not allowed to run until it is included in a sequence that is scheduled at an hour later. In essence, such remote programming selectively allows compressors to be unloaded when their demand does not exist, or during periods of peak demand of high electricity when there may be a money penalty if a compressor that is not necessary can start to run due to the installation air pressures that fluctuate. The compressors can be loaded and downloaded remotely and can be stopped and started remotely by means of commands initiated by the modem communications software on the PC and communicated to the compressors through the modem 32. All operating parameters of the compressors can be modified remotely by means of commands initiated by the modem communications software on the PC 50 and communicated to the compressors through the compressors 40, 32. These modifications include, but are not limited to, the load and discharge pressure settings of the compressors. the compressors, the Auto-Dual timer setting, the target pressure setting, the time and date setting, the operating mode, the number of vertical movement valves that open or close (this controls the supplied capacity of the compressors). The system 20 also provides effective alarms at the remote location if the compressor should shut down for any reason other than a programmed shutdown. Together with the remote alarms, the system 20 provides a description of the cause of the unscheduled shutdown at the remote location. Knowing the cause of the unscheduled shutdown can determine what course of action is needed to make the compressor work back online as quickly as possible. Because the use of energy in any industrial facility is of importance, system 20 provides the ability to buffer and record how much compressed air demand is placed on the compressors over time. This information can provide the owner of the compressors with means to more efficiently use the compressors and thereby save energy and money. System 20 can also provide the means to automatically establish and adjust a network of compressors. When using the PC to analyze the data collected with the modem of each compressor, a usage tenure can then be determined and the appropriate sequences and schedules generated and transmitted back to the compressor network.

As illustrated in Figure 1, the PC 50 with a modem 40 can access a single compressor 62 anywhere a telephone line 44 can be installed or can access a network 52 of up to sixteen (16) compressors in a single network. unlimited networks possible. It should be understood that there is no theoretical limit to the number of compressor systems, locations, or networks that can be accessed although the illustrated control system 30 has a practical limit of sixteen (16) compressors in a single network. To connect the modem 32 to the control board 30, a cable with the appropriate wiring conditions is connected to the modem 32 and then connected 70 to the control board 30. The control board 30 is where the logic receives for the control of a compressor. Without the control board 30, no compressor would be able to efficiently control its capacity. The details of the logic and associated software are described in U.S. Patent No. 5,713,724 with reference to Figures 2 and 5a-i. When the modem 32 is connected to a suitable telephone line using conventional telephone switches, with power applied to the modem using conventional methods, the control board 30 sends an initialization line to the modem 32 when the compressor system 52 is energized. This initialization line instructs the modem 32 to place itself in an answering mode and answer any incoming telephone call to the first or second call. The initialization line also tells the modem how fast it will communicate with incoming calls. Once the modem 32 is initialized it will attempt to establish a communication connection with any incoming telephone call. If it fails to establish communication, it will hang the telephone line so that another call can enter. If the modem 32 succeeds in establishing a communication connection, the modem 32 will send any data received by the telephone line to the control board 30. If this data is not recognized by the control board 30, the control board 30 will respond with an error message that is sent to port PI 70 to modem 32 and then through telephone line 44 back to the data source . If the source is a PC that is running modem communications software, it will recognize that the response to your data request is an error message and will re-send the data request. If after three attempts the software can not get an answer and there are no other active compressors linked to the compressor with the modem 32, the modem 32 will hang up. Following are example data structures for several possible messages between the PC 50 at the remote location and the control board 30 at a compressor: Data structure for an ERROR message from the control board. The Source Node is the ID number of the machine that sends the ERROR message. This will be 1 to 16 base 10 or 1 to 10 hexadecimal number and is the first byte of the message. The next byte is Destination Node and for the modem which always 255 base 10 or hexadecimal number FF. The next two bytes of the message contain the byte count of this message and will be used by the software in modem communications on the PC to determine how many bytes of the CRC number message were calculated. The next byte of the message is just a marker for the Start of the Message. The next byte of the message is the Function Code and is the only code for this message and for all other messages, in this particular message it is 2. The next byte of the message is the Subfunction Code, this is used as an error code for this message. The error codes indicate the following, unrecognized request, or a bad CRC. Any of these conditions can be caused with corrupted data in the request messages originated in the PC. The next two bytes of the message contain the CRC number for this message. CRC numbers are a well established error review for digital messages and this CRC conforms to the common methods used. The next byte is the End of Message byte and is always 253 base 10 or FD hexadecimal number. 0x00, / * 0 - Source Node * / 0x00, / * 1 - Destination Node * / 0x00, / * 2 - MSB of bytecount * / 0x06, / * 3 - LSB of bytecount * / OxFE, / * 4 - Start Message * / 0x02, / * 5 - Function Code * / 0x00, / * 6 - Subfunction Code * / 0x00, / * 7 - Upper Byte of CRC U 0x00, / * 8 - Lower Byte of CRC or OxFD, / * 9 - End Message * / Data structure for a Status Request message to the control panel. This is the message that the modem communications software running on a PC 50 sends through the modem 40 via the telephone lines 44 to the modem 32 associated with a compressor 22 and then to the control board 30 'in order to obtain the conditions of standard operation of the compressor 22. All the individual bytes of the message have already been explained, with the following exceptions. The Function Code is the real trigger for this message, it is a 3 and this always means that it is a request for the standard operating conditions. The Subfunction Code is not used for this message and is always zero. 0x00, U0 - Source Node * / 0x00, / * 1 - Destmation Node * / 0x00, / * 2 - MSB of bytecount U 0x06, / * 3 - LSB of bytecount U OxFE, / * 4 - Start Message * / 0x03, / * 5 - Function Code * / 0x00, / * 6 - Subfunction Code U 0x00, / * 7 - Upper Byte of CRC 0x00, / * 8 - Lower Byte of CRC or OxFD, / * 9 - End Message * / Structure of data for a Status Reply message on the control board. This is the message that the control board 30 sends through the modem 32 that is connected to, through telephone lines 44 to the modem 40 connected to the PC 50 running the modem communications software. The message bytes up to the Function Code have already been explained. The Function Code for this message is 4 and this identifies the message as containing the standard operating condition of the compressors. The Subfunction Code has no meaning for this message and is zero. The Status Message Structure MSB and Status Message Structure LSB are not used for this message and for this message they are always zero. The data structure for a Status Reply is as follows with and the explanation of each byte. 0x00, UO - Source Node * / 0x00, / * 1 - Destmation Node U 0x00, / * 2 - MSB of bytecount 0x52, / * 3 - LSB of bytecount V OxFE, / * 4 - Start Message * / 0x04, / * 5 - Function Code * / 0x00, / * 6 - Subfunction Code '/ 0x00, / * 7 - Status Message Structure MSB * / 0x02, / * 8 - Status Message Structure LSB U 0x00, / * 9 - Compressor State / 0x00, / * 10 - Shutdown State * / 0x00, / * 11 - Compressor Mode of Operation * / 0x00, / * 12 - Load Pressure * / 0x00, / * 13 - Unload Pressure k / 0x00, / * 14 • - Line Pressure * / 0x00, / * 15 - Sump Pressure * / 0x00, / * 16 • - Discharge Temp * / 0x00, / * 17 • - Sump Temp * / 0x00, / * 18 • - Olí Filter Switch * / 0x00, / * 19 - Intake Filter Switch * / 0x00, / * 20 - Bypass Valves * / 0x00 , / * 21 • - Motor Overload * / 0x00, / * 22 • - Main Motor Auxiliary * / 0x00, / * 23 - Air Filter Seconds MSB * / 0x00, / * 24 - Air Filter Seconds * / 0x00, / * 25 - Air Filter Seconds * / 0x00, / * 26 Air Filter Seconds LSB U 0x00, / * 27 Oil Filter Seconcls MSB * / 0x00, / * 28 Oil Filter Seconds * / 0x00, / * 29 Oil Filter Seconds * / 0x00, / * 30 Oil Filter Seconds LSB * / 0x00, / * 31 Separator Filter Seconds MSB * / 0x00, / * 32 Separator Filter Seconds * / 0x00, / * 33 Separator Filter Seconds * / 0x00, / * 34 Separator Filter Seconds LSB * / 0x00, / * 35 Loaded Seconds MSB * / 0x00, / * 36 Loaded Seconds * / 0x00, / * 37 Loaded Seconds * / 0x00, / * 38 Loaded Seconds LSB * / 0x00, / * 39 Unloadecl Seconds MSB V 0x00, / * 40 Unloaded Seconds / 0x00, / * 41 Unloaded Seconds k / 0x00, / * 42 Unloaded Seconds LSB * / 0x00, / * 43 Machine Model * / 0x00, / * 44 Machine Capacity V 0x00, / * 45 Starter Configuration * / 0x00, / * 46 Horsepower * / 0x00, / * 47 Machine Type * / 0x00, / * 48 Auto Dual Timer U 0x00, / * 49 Node Number * / 0x00, / * 50 DAM Rotation Time * / 0x00, / * 51 Bypassing Enabled * / 0x00, / * 52 Modulation Enabled * / 0x00, / * 53 Auto-Dual Timer valued * / 0x00, / * 54 Character 1 of Serial Number * / 0x00, / * 55 Character 2 of Serial Number * / 0x00, / * 56 Character 3 of Serial Number * / 0x00, / * 57 Character 4 of Serial Number * / 0x00, / * 58 Character 5 of Serial Number * / 0x00, / * 59 Character 6 of Serial Number * / 0x00, / * 60 Character 7 of Serial Number * / 0x00, / * 61 Character 8 of Serial Number * / 0x00, / * 62 Character 9 of Serial Number * / 0x00, / * 63 Character 10 of Serial Number * / 0x00, / * 64 Character 11 of Serial Number * / 0x00, / * 65 Character 12 of Serial Number * / 0x00, / * 66 Character 13 of Serial Number * / 0x00, / * 67 Character 14 of Serial Number * / 0x00, / * 68 Character 15 of Serial Number * / 0x00, / * 69 Character 16 of Serial Number * / 0x00, / * 70 Oil Seconds MSB > / 0x00, / * 71 Oil Seconds * / 0x00, / * 72 Oil Seconds * / 0x00, / * 73 Oil Seconds LSB U 0x00, / * 74 Rotation Position * / 0x00, / * 75 Total Minutes MSB * / 0x00, / * 76 - Total Minutes LSB * / 0x00, / * 77 - Online Timer * / 0x00, / * 78 - Active U 0x00, / * 79 - Operating * / 0x00, / * 80 - Bypass * / 0x00, / * 81 - Major Version Number * / 0x00, / * 82 - Minor Version Number * / 0x00, / * 83 - Upper Byte of CRC * / 0x00, / * 84 - Lower Byte of CRC * / OxFD, / * 85 - End Message * / In the previous message, the COMPRESSOR STATE byte has the following codes and possible meanings: 0 = STOPPED 1 = STATTED 2 = LOADED 3 = UNLOADED 4 = AUTO DUAL SHUTDOWN 5 = SHUTDOWN 6 = PROGRAMMED SHUTDOWN In the previous message, the byte of SHUTDOWN STATE has the following codes and possible messages: 0 = Communication with the Relay Board has been lost 1 = Contactor will not disengage 2 = Stop button or HAT backup tripped 3 = High d scharge air temperature 4 = High sump air pressure 5 = Motor overload (either mam or fan) 6 = Discharge RTD disconnected, can not monitor temperature 7 = Sump RTD disconnected, can not monitor temperature 8 = Line Pressure transducer disconnected, can not monitor pressure 9 = Sump Pressure transducer disconnected, can not monitor pressure 10 = State Machine Error 11 = Contactor wil not engage 12 = Rapid Restart of compressor (NOT USED) 13 = Possible Reverse Rotation 14 = Write error m EEPROM In the previous messages, the COMPRESSOR MODEOFOPERATION byte has the following codes and possible meanings: 0 = CONTINUOUS RUN 1 = AUTO DUAL 2 = NETWORK In the previous messages, the LOAD byte PRESSURE is the pressure at which the compressor is set to run charged. An example of the value of LOAD PRESSURE can be 6E, this is the HEX number for 110. In such a way that the load pressure would be 110 psig. The UNLOAD PRESSURE byte is the pressure at which the compressor is adjusted to discharge. Its value is in the same format as the loading pressure. The LINE PRESSURE byte is the current pressure in the discharge of the compressor package check valve. It is represented in the same way as the LOAD PRESSURE byte. The SUMP PRESSURE byte is the current pressure in the connector or the oil separator tank in the compressor package. It is represented in the same way as the LOAD PRESSURE byte. The DISCHARGE TEMP byte is the current discharge temperature of the compressor (air terminal) in Degrees F. This byte is converted in the same way as the pressures described above. The SUMP TEMP byte is the current temperature of the connector or oil separator tank in Degrees F. This byte is converted in the same way as the pressures described above. The OIL FILTER SWITCH byte has the following codes and possible meanings: 0 = BAD MAY BE A BAD SWITCH 1 = GOOD 2 = REPLACE FILTER The INTAKE FILTER SWITCH byte has the following codes and possible meanings. 0 = BAD MAY BE A BAD SWITCH 1 = GOOD 2 = REPLACE FILTER The BYPASS VALVES byte has the following codes and possible meanings. Note that this byte is only valid if the COMPRESSOR MODE byte is equal to 2. 0 = Pointer passed left, Intel closed, Lift Valves 1,2,3,4 open 1 = Pointer passed left, Intel open, Lift Valves 1,2 , 3.4 open 2 = Pointer passed left, Intel open, Lift Valves 1,2,3,4 open 3 = Pointer at machine, intel open, Lift Valves. 1,2,3,4 open 4 = Pointer at machine, intel open, Lift Valves 1,2,3, open 5 = Pointer at machine, intel open, Lift Valves 1,2 open 6 = Pointer at machine, intel open, Lift Valves 1, open 7 Pointer at machine, intel open, Lift Valves none open 8 = Pointer passing right, Intel open, Lift Valves none open 9 = Pointer passed right, Intel open, Lift Valves none, open The MOTOR OVERLOAD byte has the following codes and possible meanings. 0 = TRIPPED 1 = GOOD The MAIN MOTOR AUXILIARY byte has the following codes and possible meanings. 0 = OPEN 1 = CLOSED AIR FILTER HOURS is calculated from four (4) bytes of data representing seconds. This data has to be converted from ASCII to HEX and then changed to the correct places and changed from seconds to hours. Byte AIR FILTER SECONDS MSB Byte AIR FILTER SECONDS Byte AIR FILTER SECONDS Byte AIR FILTER SECONDS LSB An example of AIR FILTER values can be MSB = 00, next byte = IB, next byte = 98, and LSB = 9B. All of these are HEX numbers and when they are placed together we read 001B989B. When converted to decimals it would be 1808539 seconds. When converted to hours they would be 1808539/3600 = 502.37 hours. The deployment would show 502 hours because it only displays full hours. OIL FILTER HOURS is calculated from four (4) bytes of data representing seconds. This data has to be converted from ASCII to HEX and then changed to the correct places and then changed from seconds to hours, like AIR FILTER HOURS. Byte LUBE FILTER SECONDS MSB Byte LUBE FILTER SECONDS Byte LUBE FILTER SECONDS Byte LUBE FILTER SECONDS LSB SEPARATOR FILTER HOURS is calculated from four (4) bytes of data representing seconds. This data has to be converted from ASCII to HEX and then changed to the correct places and then converted into seconds to hours, like AIR FILTER HOURS. Byte SEPARATOR FILTER SECONDS MSB Byte SEPARATOR FILTER SECONDS Byte SEPARATOR FILTER SECONDS Byte SEPARATOR FILTER SECONDS LSB LOADED HOURS is calculated from four (4) bytes of data representing seconds. This data has to be converted from ASCII to HEX and then 3e is changed to the correct places and then converted into seconds to hours, like AIR FILTER HOURS. Byte LOADED SECONDS MSB Byte LOADED SECONDS Byte LOADED SECONDS Byte LOADED SECONDS LSB is..A. «^« ipre UNLOADED HOURS is calculated from four (4) bytes of data representing seconds. This data has to be converted from ASCII to HEX and then changed to the correct places and then converted from seconds to hours, like AIR FILTER HOURS. Byte UNLOADED SECONDS MSB Byte UNLOADED SECONDS Byte UNLOADED SECONDS Byte UNLOADED SECONDS LSB The MACHINE MODEL byte has the following codes and possible meanings: 0 = QSI 245 1 = QSI 370 2 = QSI 500 3 = QSI 750 4 = QSI 1000 5 = QSI 1250 6 = QSI 1500 7 = QSI SPECIAL The MACHINE CAPACITY byte has the following codes and possible meanings: 0 = 245 CFM 1 = 370 CFM 2 = 500 CFM 3 = 750 CFM 4 = 1000 CFM 5 = 1250 CFM 6 = 1500 CFM 7 = SPECIAL CFM The STARTER C0NFIGURATION byte has the following codes and possible meanings: 0 = Across-the-line Starter 1 = Wye Delta Starter 2 = Solid State Starter 3 = Remote The HORSEPOWER byte has the following codes and possible meanings: 0 = 7.5 HP 1 = 10 H.P. 2 = 15 H.P. 3 = 20 H.P. 4 = 25 H.P. 5 = 30 H.P. 6 = 40 H.P. 7 = 50 H.P. 8 = 60 H.P. 9 = 75 H.P. 10 = 100 H.P. 11 = 125 H.P. 12 = 150 H.P. 13 = 200 H.P. 14 = 250 H.P. 15 = 300 H.P. 16 = 350 H.P. The MACHINE TYPE byte has the following codes and possible meanings: 0 = Non-Lift Valve Machine * / 1 = Lift Valve Machine * / The AUTO-DUAL TIMER byte represents minutes and can be anything from one (1) to thirty (30 ). AnO (zero) is not a valid number but anO (zero) can be returned if a request is made to a NODE NUMBER that does not exist or that is disabled. The NODE NUMBER byte is a number from one (1) to sixteen (16) and must be equal to the Destination Node number from which information has been requested. The DAM ROTATION TIME byte is the time remaining in hours until the next time change and will only be used if the compressors are working in a network. The BYPOASSING ENABLED byte has the following codes and possible meanings: 0 = FALSE 1 = TRUE The MODULATION ENABLED byte has the following codes and possible meanings: 0 = FALSE 1 = TRUE The AUTO-DUAL TIMER VALUE byte would only be valid if the compressor is Discharged. This means that the COMPRESSOR STATE byte should be three (3). If this were the case, then the AUTO-DUAL TIMER VALUE byte represents the number of minutes remaining until the compressor is switched off and enters a waiting state. The serial number of the unit is contained in the following sixteen (16) bytes. Each byte represents a digit or character of a serial number. The sene number is read from left to right with the character one (1) being the character to the left. The serial number has only six (6) characters, then only the byte of character one (1) to the byte six (6) will have values. CHARACTER 10F SERIAL NUMBER CHARACTER 20F SERIAL NUMBER CHARACTER 30F SERIAL NUMBER CHARACTER 40F SERIAL NUMBER CHARACTER 50F SERIAL NUMBER CHARACTER 60F SERIAL NUMBER CHARACTER 70F SERIAL NUMBER CHARACTER 80F SERIAL NUMBER CHARACTER 90F SERIAL NUMBER CHARACTER 100F SERIAL NUMBER CHARACTER 110F SERIAL NUMBER CHARACTER 120F SERIAL NUMBER CHARACTER 130F SERIAL NUMBER CHARACTER 140F SERIAL NUMBER CHARACTER 150F SERIAL NUMBER CHARACTER 160F SERIAL NUMBER OIL HOURS is calculated from four (4) bytes of data representing seconds. This data has to be converted from ASCII to HEX and then changed to the right place and then converted from seconds to hours. OIL SECONDS MSB OIL SECONDS OIL SECONDS OIL SECONDS LSB The ROTATION POSITION byte is valid only if the COMPRESSOR MODE OF OPERATION byte equals two (2) for the NETWORK mode. The ROTATION POSITION byte represents the position of this compressor in the sequence. For example the NODE NUMBER can be three (3) but until this point the compressor is running in position one (1). TOTAL MINUTES is calculated from two (2) bytes of data representing minutes. This data has to be converted from ASCII to HEX and then changed to the correct places and changed from minutes to hours. This is the 24 hour clock time of this compressor.

TOTAL MINUTES MSB TOTAL MINUTES LSB The ONLINE TIMER byte is an indication of the quality of network communications and has the following meaning: 0 = NO COMMUNICATIONS 1 = BAD 2 = BAD to POOR 3 = POOR 4 = ACCEPTABLE 5 = GOOD This information it is only valid for linked machines that run in a network mode. The data may have to be evaluated to compare it with previous data, so that several requests will need to be made. The ACTIVE byte has the following codes and possible meanings. Note that this byte is only valid if the COMPRESSOR 'MODE OF OPERATIONA byte is equal to two (2). 0 - NOT RUNNING AND IN NETWORK MODE 1 = RUNNING AND IN NETWORK MODE The OPERATING byte has the following codes and possible meanings. Note that this byte is only valid if the COMPRESSOR MODE OF OPERATION byte equals two (2). 0 = NOT RUNNING 1 = RUNNING BYPASS byte has the following codes and possible meanings. Note that this byte is only valid if the COMPRESSOR MODE OF OPERATION byte is not equal to two (2). 0 = NO LIFT VALVES OPEN 1 = 1 LIFT VALVE OPEN 2 = 2 LIFT VALVE OPEN 3 = 3 LIFT VALVE OPEN 4 = 4 LIFT VALVE OPEN The SOFTWARE VERSION NUMBER byte is obtained from the following two (2) bytes. The MAJOR VERSION NUMBER byte A decimal point goes after this number. The MINOR VERSION NUMBER byte. Data structure for a Block Reading Request message to the electronic control system. This is the message that the modem communications software running on a PC 50 runs through the modem 40 via the telephone lines 44 to the modem 32 in a compressor and then to the control board 30 itself in order to obtain the memory information. EEPROM of the control board. This can be used to remove any of the data stored in the EEPROM memory of the control board, but the modem communications program only uses this to remove the shutdown logs of the individual compressors at this time. All the individual bytes of the message have already been explained with the following exceptions. The Function Code is the real trigger for this message, it is a ten (10) and this always means that it is a request to read a block of memory. The Subfunction Code is not used for this message and is always zero (0). The EEPROM Starting Address MSB and the EEPROM Starting Address LSB provide two bytes for a memory location in the EEPROM. The Byte Count MSB and the Byte Count LSB provide the number of bytes to be read in the EEPROM. For the shutdown log the information is stored starting at a hexadecimal memory location 100. 0x00, / * 0 - Source Node * / 0x00, / * 1 - Destination Node * / 0x00, / * 2 - MSB of bytecount * / OxOA , / * 3 - LSB of bytecount * / OxFE, / * 4 - Start Message * / 0x10, / * 5 - Function Code * / 0x00, / * 6 - Subfunction Code * / 0x00, / * 7 - EEPROM Starting Address MSB * / 0x00, / * 8 - EEPROM Starting Address LSB * / 0x00, / * 9 - Byte Count MSB * / 0x00, / * 10 - Byte Count LSB * / 0x00, / * 11 - Upper Byte of CRC * / 0x00, / * 12 - Lower Byte of CRC "/ OxFD, / * 13 - End Message * / Data structure for a Response message from Block reading of the control board. This is the message that the control board 30 sends through the modem 32 which is connected, by telephone lines 44 to the modem 40 connected to the PC 50 running the modem communications software. The message bytes up to the Function Code have already been explained. He Function Code for this message is eleven (11) and this identifies this message as containing the data of the memory reading block. The Subfunction Code has no meaning for this message and is zero (0). The EEPROM Starting Address MSB and the EEPROM Starting Address LSB should be the same as those requested. The Byte Count should be the same as the one requested and it will indicate the number Possible Bytes in this message that contains useful information. 0x00, / * 0 - Source Node * / 0x00, / * 1 - Destination Node * / 0x00, / * 2 - MSB of bytecount U 0x09, / * 3 - LSB of bytecount * / OxFE, / * 4 - Start Message * / 0x11, / * 5 - Function Code * / 0x00, / * 6 - Subfunction Code U 0x00, / * 7 - EEPROM Starting Address MSB U 0x00, / * 8 - EEPROM Starting Address LSB U 0x00, / * 9 - Byte Count * / 0x00, / * 10 - Possible Byte 1 U 0x00, / * 11 - Possible Byte 2 V 0x00, / * 12 - Possible Byte 3 * / 0x00, / * 13 -Possible Byte 4 * / 0x00, / * 14 -Possible Byte 5 * / 0x00, / * 15 - Possible Byte 6 kl 0x00, / * 16 - Possible Byte 7 * / 0x00, / * 17 - Possible Byte 8 V 0x00, / * 18 - Possible Byte 9 0x00, / * 19 - Possible Byte 10 V 0x00, / * 20 - Possible Byte 11 * / 0x00, / * 21 - Possible Byte 12 * / 0x00, / * 22 - Possible Byte 13 * / 0x00, / * 23 • - Possible Byte 14 * / 0x00, / * 24 - Possible Byte 15 * / 0x00, / * 25 • - Possible Byte 16 V 0x00, / * 26 • - Possible Byte 17 * / 0x00, / * 27 - Possible Byte 18 * / 0x00, / * 28 - Possible Byte 19 * / 0x00, / * 29 - Possible Byte 20 * / 0x00, / * 30 - Possible Byte 21 0x00, / * 31 - Possible Byte 22 * / 0x00, / * 32 - Possible Byte 23"/ 0x00, / * 33 - Possible Byte 24 * / 0x00, / * 34 - Possible Byte 25 V 0x00, / * 35 - Possible Byte 26 * / 0x00, / * 36 - Possible Byte 27 * / 0x00, / * 37 - Possible Byte 28 * / 0x00, / * 38 - Possible Byte 29 u 0x00, / * 39 - Possible Byte 30 * / 0x00, / * 40 - Possible Byte 31 u 0x00, / * 41 - Possible Byte 32 V 0x00, / * 42 - Possible Byte 33 V 0x00, / * 43 - Possible Byte 34 V 0x00, / * 44 - Possible Byte 35 u 0x00, / * 45 - Possible Byte 36 * / 0x00, / * 46 - Possible Byte 37 * / 0x00, / * 47 - Possible Byte 38 * / 0x00, / * 48 - Possible Byte 39 * / 0x00, / * 49 - Possible Byte 40 V 0x00, / * 50 - Possible Byte 41 * / 0x00, / * 51 - Possible Byte 42 u 0x00, / * 52 - Possible Byte 43 u 0x00, / * 53 - Possible Byte 44 V 0x00, / * 54 - Possible Byte 45 V 0x00, / * 55 - Possible Byte 46 V 0x00, / * 56 - Possible Byte 47 * / 0x00, / * 57 - Possible Byte 48 * / 0x00, / * 58 - Possible Byte 49 * / 0x00, / * 59 - Possible Byte 50 * / 0x00, / * 60 - Possible Byte 51 U 0x00, / * 61 - Possible Byte 52 * / 0x00, / * 62 - Possible Byte 53 V 0x00, / * 63 - Possible Byte 54 V 0x00, / * 64 - Possible Byte 55 V 0x00, / * 65 - Possible Byte 56 * / 0x00, / * 66 - Possible Byte 57 * / 0x00, / * 67 - Possible Byte 58 *, 0x00, / * 68 - Possible Byte 59 * / 0x00 , / * 69 - Possible Byte 60 V 0x00, / * 70 - Possible Byte 61 * / 0x00, / * 71 - Possible Byte 62 V 0x00, / * 72 - Possible Byte 63 V 0x00, / * 73 - Possible Byte 64 * / 0x00, / * 74 - Possible Upper Byte of CRC U 0x00, / * 75 - Possible Lower Byte of CRC * / 0x00, / * 76 - Possible End Message * / The possible shutdown codes that may be contained in the possible Bytes they are as follows: 0x01 = HIGH AIR TEMPERATURE SHUTDOWN 0x02 = HIGH AIR PRESSURE 0x03 = MOTOR OVERLOAD 0x14 = SUMP TRANSDUCER FAILURE 0 x15 = LINE TRANSDUCER FAILURE 0x16 = SUMP TEMPERATURE PROBÉ FAILURE 0x17 = DISCHARGE TEMPERATURE PROBÉ FAILURE 0x19 = AIR FILTER INDICATOR OxlA = OIL FILTER INDICATOR OxlB = SEPARATOR INDICATOR 0x21 = WELDED CONTACTOR 0x22 = FAULTY CONTACTOR 0x23 = COMMUNICATION FAILURE 0x25 = EMERGENCY STOP BUTTON PRESSED 0x26 = REVERSE ROTATION Data structure for a Sequence Request message to the control board. This is the message that the modem communications software running on a PC 50 sends through the modem 40 via telephone lines 44 to the modem 32 in a compressor 22 and then to the control board 30 itself to obtain sequence information that has been programmed in the control. All the individual bytes of the message have already been explained with the following exceptions. The Function Code is the real trigger for this message, it is an OC and this always means that this is a request for sequence information. The Subfunction Code is not used for this message and is always zero (0). 0x00, UO - Source Node * / 0x00, / * 1 - Destination Node * / 5 0x00, / * 2 - MSB of bytecount * / 0x06, / * 3 - LSB of bytecount * / OxFE, / * 4 - Start Message * / OxOC, / * 5 - Function Code * / 0x00, / * 6 - Subfunction Code * / 10 0x00, / * 7 - Upper Byte of CRC * / 0x00, / * 8 - Lower Byte of CRC * / OxFD / * 9 - End Message * / Data structure for a Sequence Response message for the control board. 15 This is the message that the Board 30 P0WER $ YNC sends through the modem 32 that is connected to, via telephone lines 44 to the modem 40 connected to the PC 50 running in the modem communications software. The bytes of the message have already been explained. Function Code 20 for this message is an OD and this identifies this message as containing the sequence information of the requested compressor. The Subfunction Code has no meaning for this message and is zero (0). There are nine possible sequences with each sequence 25 containing sixteen possible Node Numbers. The data in the Sequence n Position n byte positions will be a Node Number from zero (0) to sixteen (16), where zero (0) means that the position is empty. 0x00, / * 0 - Source Node V 0x00, / * 1 - Destination Node * / 0x00, / * 2 - MSB of bytecount * / 0x96, / * 3 - LSB of bytecount * / OxFÉ, / * 4 - Start Message * / OxOD, / * 5 - Function Code * / 0x00, / * 6 - Subfunction Code * / 0x00, / * 7 - Sequence 1 Position 1 * / 0x00, / * 8 - Sequence 1 Position 2 * / 0x00, / * 9 - Sequence 1 Position 3 * / 0x00, / * 10 - Sequence 1 Position 4 * / 0x00, / * 11 - Sequence 1 Position 5 * / 0x00, / * 12 - Sequence 1 Position 6 * / 0x00, / * 13 - Sequence 1 Position 7 * / 0x00, / * 14 - Sequence 1 Position 8 * / 0x00, / * 15 - Sequence 1 Position 9 * / 0x00, / * 16 - Sequence 1 Position 10 * / 0x00, / * 17 - Sequence 1 Position 11 * / 0x00, / * 18 - Sequence 1 Position 12 * / 0x00, / * 19 - Sequence 1 Position 13 * / 0x00, / * 20 - Sequence 1 Position 14 * / 0x00, / * 21 - Sequence 1 Position 15 * / 0x00, / * 22 Sequence 1 Positron 16 * / 0x00, / * 23 Sequence 2 Position 1 * / 0x00, / * 24 Sequence 2 Position 2 * / 0x00, / * 25 Sequence 2 Position 3 * / 0x00, / * 26 Sequence 2 Position 4 * / 0x00, / * 27 Sequence 2 Position 5 * / 0x00, / * 28 Sequence 2 Position 6 * / 0x00, / * 29 Sequence 2 Position 7 * / 0x00, / * 30 Sequence 2 Position 8 * / 0x00, / * 31 Sequence 2 Position 9 * / 0x00, / * 32 Sequence 2 Position 10 * / 0x00, / * 33 Sequence 2 Position 11 * / 0x00, / * 34 Sequence 2 Position 12 * / 0x00, / * 35 Sequence 2 Position 13 * / 0x00, / * 36 Sequence 2 Position 14 * / 0x00, / * 37 Sequence 2 Position 15 * / 0x00, / * 38 Sequence 2 Position 16 * / 0x00, / * 39 Sequence 3 Position 1 * / 0x00, / * 40 Sequence 3 Position 2 * / 0x00, / * 41 Sequence 3 Position 3 * / 0x00, / * 42 Sequence 3 Position 4 * / 0x00, / * 43 Sequence 3 Position 5 * / 0x00, / * 44 Sequence 3 Position 6 * / 0x00, / * 45 Sequence 3 Position 7 * / 0x00, / * 46 Sequence 3 Position 8 * / 0x00, / * 47 - Sequence 3 Position 9 * / 0x00, / * 48 - Sequence 3 Position 10 * / 0x00, / * 49 - Sequence 3 Position 11 * / 0x00, / * 50 - Sequence 3 Position 12 * / 0x00, / * 51 - Sequence 3 Position 13 * / 0x00, / * 52 - Sequence 3 Position 14 * / 0x00, / * 53 - Sequence 3 Position 15 * / 0x00, / * 54 - Sequence 3 Position 16 * / 0x00, / * 55 - Sequence 4 Position 1 * / 0x00, / * 56 - Sequence 4 Position 2 * / 0x00, / * 57 - Sequence 4 Position 3 * / 0x00, / * 58 - Sequence 4 Position 4 * / 0x00, / * 59 - Sequence 4 Position 5 * / 0x00 , / * 60 - Sequence 4 Position 6 * / 0x00, / * 61 - Sequence 4 Position 7 '* / 0x00, / * 62 - Sequence 4 Position 8 • * / 0x00, / * 63 - Sequence 4 Position 9 --V 0x00, / * 64 - Sequence 4 Position 10 * / 0x00, / * 65 - Sequence 4 Position 11 * / 0x00, / * 66 - Sequence 4 Position 12 * / 0x00, / * 67 - Sequence 4 Position 13 * / 0x00, / * 68 - Sequence 4 Position 14 * / 0x00, / * 69 - Sequence 4 Position 15 * / 0x00 , / * 70 - Sequence 4 Position 16 * / 0x00, / * 71 - Sequence 5 Position 1 * / ^ aya ^^^^^ to 0x00, / * 72 - Sequence 5 Position 2 * / 0x00, / * 73 - Sequence 5 Position 3 * / 0x00, / * 74 - Sequence 5 Position 4 * / 0x00, / * 75 - - Sequence 5 Position 5 * / 0x00, / * 76 - Sequence 5 Position 6 * / 0x00, / * 77 - Sequence 5 Position 7 * / 0x00, / * 78 - Sequence 5 Position 8 * / 0x00, / * 79 - Sequence 5 Position 9 * / 0x00, / * 80 - Sequence 5 Position 10 * / 0x00, / * 81 - Sequence 5 Position 11 * / 0x00, / * 82 - Sequence 5 Position 12 * / 0x00, / * 83 - Sequence 5 Position 13 * / 0x00, / * 84 - Sequence 5 Position 14 * / 0x00, / * 85 - Sequence 5 Position 15 * / 0x00, / * 86 - Sequence 5 Position 16 * / 0x00, / * 87 - Sequence 6 Position 1 * / 0x00, / * 88 - Sequence 6 Position 2 * / 0x00, / * 89 - Sequence 6 Position 3 * / 0x00, / * 90 - Sequence 6 Position 4 * / 0x00, / * 91 - Sequence 6 Position 5 * / 0x00, / * 92 - Sequence 6 Position 6 * / 0x00, / * 93 - Sequence 6 Position 7 * / 0x00, / * 94 - Sequence 6 Position 8 * / 0x00, / * 95 - Sequence 6 Position 9 * / 0x00, / * 96 - Sequence 6 Position 10 * / Hfgg HÍ J & ffi- y ^ i o 0x00, / * 97 - Sequence 6 Position 11 * / 0x00, / * 98 - Sequence 6 Position 12 * / 0x00, / * 99 - Sequence 6 Position 13 * / 0x00, / * 100 - Sequence 6 Position 14 * / 0x00, / * 101 - Sequence 6 Position 15 * / 0x00, / * 102 - Sequence 6 Position 16 * / 0x00, / * 103 - Sequence 7 Position 1 * / 0x00, / * 104 - Sequence 7 Position 2 * / 0x00, / * 105 - Sequence 7 Position 3 * / 0x00, / * 106 - Sequence 7 Position 4 * / 0x00, / * 107 - Sequence 7 Position 5 * / 0x00, / * 108 - Sequence 7 Position 6 * / 0x00, / * 109 - Sequence 7 Position 7 * / 0x00, / * 110 - Sequence 7 Position 8 * / 0x00, / * 111 - Sequence 7 Position 9 * / 0x00, / * 112 - Sequence 7 Position 10 * / 0x00, / * 113 - Sequence 7 Position 11 * / 0x00, / * 114 - Sequence 7 Position 12 * / 0x00, / * 115 - Sequence 7 Position 13 * / 0x00, / * 116 - Sequence 7 Position 14 * / 0x00, / * 117 - Sequence 7 Position 15 * / 0x00, / * 118 - Sequence 7 Position 16 * / 0x00, / * 119 - Sequence 8 Position 1 * / 0x00, / * 120 - Sequence 8 Position 2 * / 0x00, / * 121 - Sequence 8 Position 3 * / 0x00, / * 122 - Sequence 8 Position 4 * / 0x00, / * 123 - Sequence 8 Position 5 * / 0x00, / * 124 - Sequence 8 Position 6 * / 0x00, / * 125 - Sequence 8 Position 7 * / 0x00, / * 126 - Sequence 8 Position 8 * / 0x00, / * 127 - Sequence 8 Position 9 * / 0x00, / * 128 - Sequence 8 Position 10 * / 0x00, / * 129 - Sequence 8 Position 11 * / 0x00, / * 130 - Sequence 8 Position 12 * / 0x00, / * 131 - Sequence 8 Position 13 * / 0x00, / * 132 - Sequence 8 Position 14 * / 0x00, / * 133 - Sequence 8 Position 15 * / 0x00, / * 134- Sequence 8 Position 16 * / 0x00, / * 135 - Sequence 9 Position 1 * / 0x00, / * 136 - Sequence 9 Position 2 * / 0x00, / * 137 - Sequence 9 Position 3 * / 0x00, / * 138 - Sequence 9 Position 4 * / 0x00, / * 139 - Sequence 9 Position 5 * / 0x00, / * 140- Sequence 9 Position 6 * / 0x00, / * 141- Sequence 9 Position 7 * / 0x00, / * 142- Sequence 9 Position 8 * / 0x00, / * 143 - Sequence 9 Position 9 * / 0x00, / * 144- Sequence 9 Position 10 * / 0x00, / * 145- Sequence 9 Position 11 * / 0x00, / * 146 - Sequence 9 Position 12 * / 0x00, / * 147- Sequence 9 Position 13 * / 0x00, / * 148 - Sequence 9 Position 14 * / 0x00, / * 149 - Sequence 9 Position 15 * / 0x00, / * 150- Sequence 9 Position 16 * / 0x00, / * 151 - Upper Byte of CRC * / 0x00, / * 152- Lower Byte of CRC * / OxFD, / * 153- End Message * / Structure of data for a message of schedule request to the control board. This is the message that the modem communications software running on a PC 50 sends through the modem 40 via telephone lines 44 to the modem 32 in a compressor 22 and then to the control board 30 itself in order to obtain the sequence information that It has been programmed on the control board 30. All the individual bytes of the message have already been explained with the following exceptions. The Function Code is the real trigger for this message, it is a 0E and this always means that it is a request for the schedule information. The Subfunction Code is not used for this message and is always zero (0). 0x00, / * 0 - Source Node * / 0x00, / * 1 - Destination Node U 0x00, / * 2 - MSB of bytecount * / 0x06, / * 3 - LSB of bytecount * / OxFE, / * 4 - Start Message * / OxOE, / * 5 - Function Code * / 0x00, / * 6 - Subfunction Code * / 0x00, / * 7 - Upper Byte of CRC * / 0x00, / * 8 - Lower Byte of CRC or OxFD, / * 9 - End Message * / Data structure for a Schedule Response message from the control board. This is the message that the control board 30 sends through the modem 32 that is connected to, via telephone lines 44 to the modem 40 connected to the PC 50 running the modem communications software. The bytes of the message until the Function Code have already been explained. The Function Code for this message is 0F and this identifies this message as containing the schedule information of the requested compressor. The Subfunction Code has no meaning for this message and is zero (0). There are seven (7) possible days with each day containing nine (9) possible change times and sequence numbers. Holidays are not used at this time in such a way that the data contained in these bytes have no use. The changeover time is contained in two (2) bytes and is representative of a clock value of twenty-four (24) hours in minutes. The sequence number can be anything from one (1) to nine (9) and is representative of the programmed sequences 0x00, / * 0 - Source Node * / 0x00, / * 1 - Destmation Node U 0x00, / * 2 - MSB of bytecount U 0xF9, / * 3 - LSB of bytecount * / OxFE, / * 4 - Start Message * / OxOF, / * 5 - Function Code * / 0x00, / * 6 - Subfunction Code * / 0x00, / * 7 - Sunday Time 1 Shift Time (MSB) * / 0x00, / * 8 - Sunday Time 1 Shift Time (LSB¡ * / 0x00, / * 9 - Sunday Time 1 Sequence Number * / 0x00, / * 10 - Sunday Time 2 Shift Time (MSB) * / 0x00, / * 11 - Sunday Time 2 Shift Time (LSB) * / 0x00, / * 12 - Sunday Time 2 Sequence Number * / 0x00, / * 13 - Sunday Time 3 Shift Time (MSB) * / 0x00, / * 14 - Sunday Time 3 Shift Time (LSB) * / 0x00, / * 15 • • Sunday Time 3 Sequence Number * / 0x00, / * 16 - - Sunday Time 4 Shift Time (MSB) * / 0x00, / * 17 - • Sunday Time 4 Shift Time (LSB) * / 0x00, / * 18 - • Sunday Time 4 Sequence Number / 0x00, / * 19 • • Sunday Time 5 Shift Time (MSB) * / 0x00, / * 20 - - Sunday Time 5 Shift Time (LSB) * / 0x00, / * 21 - • Sunday Time 5 Sequence Number / 0x00, / * 22 - • Sunday Time 6 Shift Time (MSB) * / 0x00, / * 23 - - Sunday Time 6 Shift Time (LSB) * / 0x00, / * 24 - Sunday Time 6 Sequence Number / 0x00, / * 25 - Sunday Time 7 Shift Time (MSB) * / 0x00, / * 26 - Sunday Time 7 Shift Time (LSB) * / 0x00, / * 27 - Sunday Time 7 Sequence Number * / 0x00, / * 28 - Sunday Time 8 Shift Time (MSB) * / 0x00, / * 39 - Sunday Time 8 Shift Time (LSB) * / 0x00, / * 30 - Sunday Time 8 Sequence Number * / 0x00, / * 31 - Sunday Time 9 Shift Time (MSB) * / 0x00, / * 32 - Sunday Time 9 Shift Time (LSB) * / 0x00, / * 33 - Sunday Time 9 Sequence Number * / 0x00, / * 34 - Monday Time 1 Shift Time (MSB) * / 0x00, / * 35 - Monday Time 1 Shift Time (LSB) * / 0x00, / * 36 - Monday Time 1 Sequence Number * / 0x00, / * 37 - Monday Time 2 Shift Time (MSB) * / 0x00, / * 38 - Monday Time 2 Shift Time (LSB) * / 0x00, / * 49 - Monday Time 2 Sequence Number * / 0x00, / * 40 - Monday Time 3 Shift Time (MSB) * / 0x00, / * 41 - Monday Time 3 Shift Time (LSB) * / 0x00, / * 42 - Monday Time 3 Sequence Number * / 0x00, / * 43 - Monday Time 4 Shift Time (MSB) * / 0x00, / * 44 - Monday Time 4 Shift Time (LSB) * / 0x00, / * 45 - Monday Time 4 Sequence Number * / 0x00, / * 46 - Monday Time 5 Shift Time (MSB) * / 0x00, / * 47 - Monday Time 5 Shift Time (LSB) * / 0x00, / * 48 - Monday Time 5 Sequence Number * / - You are: -; - • "«. Jp-r-0x00, / * 59 - Monday Time 6 Shift Time (MSB) * / 0x00, / * 50 - Monday Time 6 Shift Time (LSB) * / 0x00, / * 51 - Monday Time 6 Sequence Number * / 0x00, / * 52 - Monday Time 7 Shift Time (MSB) * / 0x00, / * 53 - Monday Time 7 Shift Time (LSB) * / 0x00, / * 54 - Monday Time 7 Sequence Number * / 0x00, / * 55 - Monday Time 8 Shift Time (MSB) * / 0x00, / * 56 - Monday Time 8 Shift Time (LSB) * / 0x00, / * 57 - Monday Time 8 Sequence Number * / 0x00, / * 58 - Monday Time 9 Shift Time (MSB) * / 0x00, / * 69 - Monday Time 9 Shii t Time (LSB) * / 0x00, / * 60 - Monday Time 9 Sequence Number * / 0x00, / * 61 - Tuesday Time 1 Shift Time (MSB) * / 0x00, / * 62 - Tuesday Time 1 Shift Time (LSB) * / 0x00, / * 63 - Tuesday Time 1 Sequence Number * 0x00, / * 64 - Tuesday Time 2 Shift Time (MSB) * / 0x00, / * 65 - Tuesday Time 2 Shift Time (LSB) * / 0x00, / * 66 - Tuesday Time 2 Sequence Number * / 0x00, / * 67 - Tuesday Time 3 Shift Time (MSB) * / 0x00, / * 68 - Tuesday Time 3 Shift Time (LSB) * / 0x00, / * 79 - Tuesday Time 3 Sequence Number * / 0x00, / * 70 - Tuesday Time 4 Shift Time (MSB) * / 0x00, / * 71 - Tuesday Time 4 Shift Time (LSB) * / 0x00, / * 72 -Tuesday Time 4 Sequence Number * / 0x00, / * 73 - Tuesday Time 5 Shift Time (MSB) * / 0x00, / * 74 Tuesday Time 5 Shift Time (LSB) * / 0x00, / * 75 Tuesday Time 5 Sequence Number * / 0x00, / * 76 Tuesday Time 6 Shift Time (MSB) * / 0x00, / * 77 Tuesday Time 6 Shift Time (LSB) * / 0x00, / * 78 Tuesday Time 6 Sequence Number * / 0x00, / * 89 Tuesday Time 7 Shift Time (MSB) * / 0x00, / * 80 Tuesday Time 7 Shift Time (LSB) * / 0x00, / * 81 Tuesday Time 7 Sequence Number * / 0x00, / * 82 Tuesday Time 8 Shift Time (MSB) * / 0x00, / * 83 Tuesday Time 8 Shift Time (LSB) * / 0x00, / * 84 Tuesday Time 8 Sequence Number * / 0x00, / * 85 Tuesday Time 9 Shift Time (MSB) * / 0x00, / * 86 Tuesday Time 9 Shift Time (LSB) * / 0x00, / * 87 Tuesday Time 9 Sequence Number * / 0x00, / * 88 Wednesday Time 1 Shift Time (MSB) * / 0x00, / * 99 Wednesday Time 1 Shift Time (LSB) * / 0x00, / * 90 Wednesday Time 1 Sequence Number * / 0x00, / * 91 Wednesday Time 2 Shift Time (MSB) * / 0x00, / * 92 Wednesday Time 2 Shift Time (LSB) * / 0x00, / * 93 Wednesday Time 2 Sequence Number * / 0x00, / * 94 Wednesday Time 3 Shift Time (MSB) * / 0x00, / * 95 Wednesday Time 3 Shift Time (LSB) * / 0x00, / * 96 Wednesday Time 3 Sequence Number * / 0x00, / * 97 Wednesday Time 4 Shift Time (MSB) * / 0x00, / * 98 Wednesday Time 4 Shift Time (LSB) * / .7í 0x00, / * 99 - Wednesday Time 4 Sequence Number * / 0x00, / * 100 - Wednesday Time 5 Shift Time (MSB) * / 0x00, / * 101 - Wednesday Time 5 Shift Time (LSB) * / 0x00, / * 102 - Wednesday Time 5 Sequence Number * / 0x00, / * 103 - Wednesday Time 6 Shift Time (MSB) * / 0x00, / * 104 - Wednesday Time 6 Shift Time (LSB) * / 0x00, / * 105 - Wednesday Time 6 Sequence Number * / 0x00, / * 106 - Wednesday Time 7 Shift Time (MSB) * / 0x00, / * 107 - Wednesday Time 7 Shift Time (LSB) * / 0x00, / * 108 - Wednesday Time 7 Sequence Number * / 0x00, / * 109 - Wednesday Time 8 Shift Time (MSB) * / 0x00, / * 110 - Wednesday Time 8 Shift Time (LSB) * / 0x00, / * 111 - Wednesday Time 8 Sequence Number * / 0x00, / * 112 - Wednesday Time 9 Shift Time (MSB) * / 0x00, / * 113 - Wednesday Time 9 Shift Time (LSB) * / 0x00, / * 114 - Wednesday Time 9 Sequence Number * / 0x00, / * 115 - Thursday Time 1 Shift Time (MSB) * / 0x00, / * 116 - Thursday Time 1 Shift Time (LSB) * / 0x00, / * 117 - Thursday Time 1 Sequence Number * / 0x00, / * 118 - Thursday Time 2 Shift Time (MSB) * / 0x00, / * 119 - Thursday Time 2 Shift Time (LSB) * / 0x00, / * 120 - Thursday Time 2 Sequence Number * / 0x00, / * 121 - Thursday Time 3 Shift Time (MSB) * / 0x00, / * 122 - Thursday Time 3 Shift Time (LSB) * / 0x00, / * 123 - Thursday Time 3 Sequence Number * / 0x00, / * 124 - Thursday Time 4 Shift Time (MSB) * / 0x00, / * 125 - Thursday Time 4 Shift Time (LSB) * / 0x00, / * 126 - Thursday Time 4 Sequence Number * / 0x00, / * 127 - Thursday Time 5 Shift Time (MSB) * / 0x00, / * 128 - Thursday Time 5 Shift Time (LSB) * / 0x00, / * 139 - Thursday Time 5 Sequence Number * / 0x00, / * 130 - Thursday Time 6 Shift Time (MSB) * / 0x00, / * 131 - Thursday Time 6 Shift Time (LSB) * / 0x00, / * 132 - Thursday Time 6 Sequence Number * / 0x00, / * 133 - Thursday Time 7 Shift Time (MSB) * / 0x00, / * 134 - Thursday Time 7 Shift Time (LSB) * / 0x00, / * 135 - Thursday Time 7 Sequence Number * / 0x00, / * 136 - Thursday Time 8 Shift Time (MSB) * / 0x00, / * 137 - Thursday Time 8 Shift Time (LSB) * / 0x00, / * 138 - Thursday Time 8 Sequence Number * / 0x00, / * 149 - Thursday Time 9 Shift Time (MSB) * / 0x00, / * 140 - Thursday Time 9 Shift Time (LSB) * / 0x00, / * 141 -Thursday Time 9 Sequence Number * / 0x00, / * 142 - Fpday Time 1 Shift Time (MSB) * / 20 0x00, / * 143 - Friday Time 1 Shift Time (LSB) * / 0x00, / * 144 - Friday Time 1 Sequence Number * / 0x00, / * 145 - Friday Time 2 Shift Time (MSB) * / 0x00, / * 146 - Friday Time 2 Shift Time (LSB) * i 0x00, / * 147 - Friday Time 2 Sequence Number * / 25 0x00, / * 148 - Friday Time 3 Shift Time (MSB) * / | g ¡Bs? s? si7 j7¡ rf »¿j ** .'- * ~ 0x00, / * 149 - Friday Time 3 Shift Time (LSB) * / 0x00, / * 150 - Friday Time 3 Sequence Number * / 0x00, / * 151 - Friday Time 4 Shift Time (MSB) * / 0x00, / * 152 - Friday Time 4 Shift Time (LSB) * / 0x00, / * 153 - Friday Time 4 Sequence Number * / 0x00, / * 154 - Friday Time 5 Shift Time (MSB) * / 0x00, / * 155 - Friday Time 5 Shift Time (LSB) * / 0x00, / * 156 - Friday Time 5 Sequence Number * / 0x00, / * 157 - Friday Time 6 Shift Time (MSB) * / 0x00, / * 158 - Friday Time 6 Shift Time (LSB) * / 0x00, / * 169 - Friday Time 6 Sequence Number * / 0x00, / * 160 - Friday Time 7 Shift Time (MSB) * / 0x00, / * 161 - Friday Time 7 Shift Time (LSB) * / 0x00, / * 162 - Friday Time 7 Sequence Number * / 0x00, / * 163 - Friday Time 8 Shift. Time (MSB) * / 0x00, / * 164 - Friday Time 8 Shift Time (LSB) * / 0x00, / * 165 - Friday Time 8 Sequence Number * / 0x00, / * 166 - Friday Time 9 Shift Time (MSB) * / 0x00, / * 167 - Friday Time 9 Shift Time (LSB) * / 0x00, / * 168 - Friday Time 9 Sequence Number * / 0x00, / * 179 - Saturday Time 1 Shift Time (MSB) * / 0x00, / * 170 - Saturday Time 1 Shift Time (LSB) * / 0x00, / * 171 - Saturday Time 1 Sequence Number * / 0x00, / * 172 - Saturday Time 2 Shift Time (MSB) * / 0x00, / * 173 - Saturday Time 2 Shift Time (LSB) * / 0x00, / * 174 Saturday Time 2 Sequence Number * / 0x00, / * 175 Saturday Time 3 Shift Time (MSB) * / 0x00, / * 176 Saturday Time 3 Shift Time (LSB) * / 0x00, / * 177 Saturday Time 3 Sequence Number * / 0x00, / * 178 Saturday Time 4 Shift Time (MSB) * / 0x00, / * 189 Saturday Time 4 Shift Time (LSB) * / 0x00, / * 180 Saturday Time 4 Sequence Number * / 0x00, / * 181 Saturday Time 5 Shift Time (MSB) * / 0x00, / * 182 Saturday Time 5 Shift Time (LSB) * / 0x00, / * 183 Saturday Time 5 Sequence Number * / 0x00, / * 184 Saturday Time 6 Shift Time (MSB) * / 0x00, / * 185 Saturday Time 6 Shift Time (LSB) * / 0x00, / * 186 Saturday Time 6 Sequence Number * / 0x00, / * 187 Saturday Time 7 Shift Time (MSB) * / 0x00, / * 188 Saturday Time 7 Shift Time (LSB) * / 0x00, / * 199 Saturday Time 7 Sequence Number * / 0x00, / * 190 Saturday Time 8 Shift Time (MSB) * / 0x00, / * 191 Saturday Time 8 Shift Time (LSB) * / 0x00, / * 192 Saturday Time 8 Sequence Number * / 0x00, / * 193 Saturday Time 9 Shift Time (MSB) * / 0x00, / * 194 Saturday Time 9 Shift Time (LSB) * / 0x00, / * 195 Saturday Time 9 Sequence Number * / 0x00, / * 196 Holiday 1 Time 1 Shift Time (MSB) * / 0x00, / * 197 Holiday 1 Time 1 Shift Time (LSB) * / 0x00, / * 198 Holiday 1 Time 1 Sequence Number * / 0x00, / * 199 - Holiday 1 Time 2 Shift Time (MSB) * / 0x00, / * 200 - Holiday 1 Time 2 Shift Time (LSB) * / 0x00, / * 201 - Holiday 1 Time 2 Sequence Number * / 0x00, / * 202 - Holiday 1 Time 3 Shift Time (MSB) * / 0x00, / * 203 - Holiday 1 Time 3 Shift Time (LSB) * / 0x00, / * 204 - Holiday 1 Time 3 Sequence Number * / 0x00, / * 205 - Holiday 1 Time 4 Shift Time (MSB) * / 0x00, / * 206 - Holiday 1 Time 4 Shift Time (LSB) * / 0x00, / * 207 - Holiday 1 Time 4 Sequence Number * / 0x00, / * 208 - Holiday 1 Time 5 Shift Time (MSB) * / 0x00, / * 209 - Holiday 1 Time 5 Shift Time (LSB) * / 0x00, / * 210 - Holiday 1 Time 5 Sequence Number * / 0x00, / * 211 - Holiday 1 Time 6 Shift Time (MSB) * / 0x00, / * 212 - Holiday 1 Time 6 Shift Time (LSB) * / 0x00, / * 213 - Holiday 1 Time 6 Sequence Number * / 0x00, / * 214 - Holiday 1 Time 7 Shift Time (MSB) * / 0x00, / * 215 - Holiday 1 Time 7 Shift Time (LSB) * / 0x00, / * 216 - Holiday 1 Time 7 Sequence Number * / 0x00, / * 217 - Holiday 1 Time 8 Shift Time (MSB) * / 0x00, / * 218 - Holiday 1 Time 8 Shift Time (LSB) * / 0x00, / * 219 - Holiday 1 Time 8 Sequence Number * / 0x00, / * 220 - Holiday 1 Time 9 Shift Time (MSB) * / 0x00, / * 221 - Holiday 1 Time 9 Shift Time (LSB) * / 0x00, / * 222 - Holiday 1 Time 9 Sequence Number * / 0x00, / * 223 - Holiday 2 Time 1 Shift Time (MSB) * / 0x00, / * 224 - Holiday 2 Time 1 Shift Time (LSB) * / 0x00, / * 225 - Holiday 2 Time 1 Sequence Number * / 0x00, / * 226 - Holiday 2 Time 2 Shift Time (MSB) * / 0x00, / * 227 - Holiday 2 Time 2 Shift Time (LSB) * / 0x00, / * 228 - Holiday 2 Time 2 Sequence Number * / 0x00, / * 239 - Holiday 2 Time 3 Shift Time (MSB) * / 0x00, / * 230 - Holiday 2 Time 3 Shift Time (LSB) * / 0x00, / * 231 - Holiday 2 Time 3 Sequence Number * / 0x00, / * 232 - Holiday 2 Time 4 Shift Time (MSB) * / 0x00, / * 233 - Holiday 2 Time 4 Shift Time (LSB) * / 0x00, / * 234 - Holiday 2 Time 4 Sequence Number * / 0x00, / * 235 - Holiday 2 Time 5 Shift Time (MSB) * / 0x00, / * 236 - Holiday 2 Time 5 Shift Time (LSB) * / 0x00, / * 237 - Holiday 2 Time 5 Sequence Number * / 0x00, / * 238 - Holiday 2 Time 6 Shift Time (MSB) * / 0x00, / * 249 - Holiday 2 Time 6 Shift Time (LSB) * / 0x00, / * 240 - Holiday 2 Time 6 Sequence Number * / 0x00, / * 241 - Holiday 2 Time 7 Shift Time (MSB) * / 0x00, / * 242 - Holiday 2 Time 7 Shift Time (LSB) * / 0x00, / * 243 - Holiday 2 Time 7 Sequence Number * / 0x00, / * 244 - Holiday 2 Time 8 Shift Time (MSB) * / 0x00, / * 245 - Holiday 2 Time 8 Shift Time (LSB) * / 0x00, / * 246 - Holiday 2 Time 8 Sequence Number * / 0x00, / * 247 - Holiday 2 Time 9 Shift Time (MSB) * / 0x00, / * 248 - Holiday 2 Time 9 Shift Time (LSB) * / 0x00, / * 249 - Holiday 2 Time 9 Sequence Number * / 0x00, / * 250 - Upper Byte of CRC * / 0x00, / * 251 - Lower Byte of CRC * / OxFD / * 252 - End Message * / Additional information on the operation of the modem communications software used with the systems and methods of the present application is contained in "Instuction Manual for Modem Communications" (Instruction Manual for Modem Communications) available from Quincy Compressor Division of Coltec Industries, Inc., Bay Minette, Alabama, the description of which is incorporated herein by reference. As illustrated in Figures 3-18, flowcharts are used to represent a representative mode of modem communications software useful with the systems and methods of the present application. These flowcharts illustrate the software useful for monitoring and controlling compressors. Said software is used to communicate instructions to the different compressors and receive data from the different compressors including the display of various compressor parameters on a screen and store the different compressor data in files on a PC at a remote location. Once the modem communications software used with the present application has been loaded with the PC 50, shown in Figure 1, the PC 50 can then access the modem communications software and initiate communications with the control board 30 on the board 52 remote compressor. As shown in Figure 3, once communications have been established between the PC 50 via modem 40, and the modem 32 to the control board 30 located in the compressor 22 of the linked compressors 52 or the single compressor 62, the Modem communications software program starts at 100. After the program has been started, the program performs the presence of a list of authorized serial numbers for the compressors at 102. If the list of serial numbers of the Serial numbers in the remote 52 place matches the serial numbers embedded in the serial communications program by modem, the program allocates sufficient memory in the PC to allow the program to work in 104. If no serial number of the compressor in the remote place matches the serial numbers embedded in the modem communications software program at 105, the program ends at 106. Then, the communications software program by modem check to determine if there is enough memory available on the PC to allocate sufficient memory for the program's needs at 107 if not at 108, the program ends at 106. If there is sufficient memory available within the modem communications software program in 109, the modem communications software establishes a PC deployment to a graphics mode at 110 and initializes the mouse at 112. Then, the modem communications software program checks to see if a printer driver is present on the computer. If there is no printer dpver present in 116 the program ends in 106. If the printer driver is present in 117, the program checks to see if the Quincy Compressor logo is present in the introduction screen in 118. If the logo it is not present in 120, the program ends in 106. If the logo is present in 122, the program displays the introduction screen in the PC monitor in 124. At this point, The program accesses the main program circuit at 130. This main circuit is repeated until the program exits at 106. As shown in Figure 4, when entering the main circuit 130, the modem communications software program checks to see if the main circuit output flag has been set 132. The output flag 132 can be set by pressing the escape key on the PC keyboard or by selecting exit from the PC drop menu. archive. If the output flag has been set to 134, the program exits at 136. If the output flag has not been set to 138, the program checks to see if the PC 50 is in line with the control board 30 in place remote control at 140. Specifically, the control port checks to see if there is an open telephone line through the modem 40 that is in communication with the modem 32 or 60 at the remote location and that the modem communications software can send data to the control board 30 through the modem 32. If the online status is positive at 142, the modem communications software sends a request for information status of each possible compressor in order to determine if there are active compressors for which it is possible to have information on 144. If there are active compressors, the modem communications software updates the current list of active compressors. The information returned is the list of compressor nodes that the modem communications software will use to obtain the specific compressor data. The compressor node number is used in the destination node of the requested messages sent to the control board 30. If three (3) error messages are returned from the control board to the modem communications software or no response is returned from the remote location to the remote PC location at 146, the modem communication software will hang the connection between the PC Remote modem and modem 32 in the place of the remote compressor in 148. If 150 do not return errors or if there are valid responses to the requested messages, then the data in the response messages are processed by the modem communications software in 152. As shown in Figure 5, once the modem communications software has processed the status response message at 154, the modem communications software determines whether the response messages are valid to determine whether one hundred seventy two (172) characters have been received from the remote location in L56. One hundred and seventy-two (172) characters is the appropriate length of the data series of the status response message which shall be received from the control board 30 on the remote compressor. If there is no message with one hundred and seventy-two (172) characters returned to 158, it may be that the compressor is only inactive. If this is the case, then the modem communications software will attempt to verify that the compressor has become inactive by attempting to receive data from the machine at least three (3) times in 160. At this point the count of a retry is increased in 162 and it is verified to be sure that it is not more than three (3) retries. If it is not more than three (3) retries, then the routine returns to where it was called and the process is repeated. If the modem communications software has already tried three (3) times, the modem communications software advances to the next active node number of the compressor instead of the compressor and this route goes back to where it was called and the process is repeated. If the reply message is one hundred and seventy-two (172) characters in 170, a second revision for a valid message is made by checking the CRC number in 174. If the CRC number is not correct as it is contained in the message received from the message board. control of the compressor in place of the compressor in 176, a total of three (3) retries will be made in order to obtain the correct data in 162. If three (3) retries have already been made, then the modem communications software advances to the next active node number for the compressor and the routine returns to where it was called and the process is repeated. If the message returned from the remote compressor has been adequately adjusted in all its respects to 180, the data received from the compressor is broken down into 182 in its individual pieces and all related variables and files in the modem communications software are updated in 184. The network totals are calculated and the averages amount to 188. The retry count is reset to 190 and the number of nodes is advanced to the next active node number at 192. At this point, a packet data delay runs on 194. This delay is to avoid overriding any queue of calls in the modems of the control board 30 and the modem 32 for the control board 30. Then this routine goes back to where it was called and the process repeats itself. Referring now to Figure 4, once the valid data has been collected from the control board 30, the modem communications software performs a security review. Since one of the components in the data contained in the status response message is the serial number of the compressor that the particular control board 30 is controlling, the modem communications software compares the compressor serial number on the board. control to the list of authorized serial numbers embedded in the serial number of communications by modem. If the serial number of the compressor with which it is being communicated is not on the list at 209, then the modem communications software comes out at 200. If the serial number is a valid serial number at 210, then the signaling at line are reset to 212 and the modem communications software continues to communicate with the control board 30 at the remote compressor site at 214. Referring now to Figure 6, the modem communications software checks to see if the Hanging signaling has been set to 220. If the signaling has been set to 221, the modem communications software hangs up the modem, resets the taEa = St ^^^^ a ^ i ^ ia ^ ii signaling and returns to the place where this routine was called in 214 in Figure 4 and then to 200. If the hanging signaling has not been set to 224, the software Modem communications check at 226 to see if the modem communications software is online and has a connection to the control board 30 at the remote compressor location. If the modem communications software is not online at 228, then the modem communications software checks to see if there are active graphs at 230 and if it is active at 232, the modem communications software updates the graph at 234. If the graph is not active at 236, the program continues at 238. If the modem communications software is online at 240, then the data from the compressors are being collected and can not be plotted while the modem communications software is online. In 242, the modem communications software checks to see if the modem communications software is still connected through the modem 32 and if the authorization of the serial number is valid. If it is still connected and the serial number is valid at 244, the modem communications software then displays the marker screen at 246 and releases the connection signal at 248. At this point, the modem communications software reviews the entries of any user in 249, which would be input by mouse, to select other screens to remove other data, to print the screen, or to hang up. User entries are handled at 250. Referring now to Figure 7, after user entries 250, the mouse hides at 252 and a virtual memory buffer for a storage behind the image is created at 254. If enough available memory exists to create the virtual image storage at 256 then the graphics images, or images from behind, are stored in the memory buffer at 258 and the allocated memory for the graphic instrument library and the associated display buttons at 260. If there was not enough memory available to create the virtual memory storage in 262, then the program exits in 264. Once the memory for the library of graphic instruments and the associated display buttons has been assigned, the communications software by modem check to see if the file menu is selected in 266. If the file menu is not selected in 268, then the program returns where it is called this routine in 270. If the file menu is selected in 272, the modem communications software checks to see if the graph screen is active in 274. If the graph screen is active in 266, then the file filter the data format is set to 278. If not to 280, the modem communications software checks to see if the time editor is active at 282. If the time editor is active at 284, the file filter is set to the time format in 286. Next, the modem communications software checks to see if the sequence editor is active in 290. If the sequence editor is active in 292, the file filter is set in the sequence filter in 294. If the sequence editor is not active at 296, the modem communications software checks to see if log file 298 is active at 300. If the log file is active at 300, then the switch is set to e in the log filter in 302. If the log file is not active in 304, then the modem communications software causes the mouse pointer to be displayed and the software to return to where it was called in 250 in Figure 6 and then to 400. If at any point where said switch on the data filter was achieved at 278, 286, 294, or 302, the modem communications software program then moves through a routine at 306. As shown in Figure 8, routine 306 comprises the modem communications software by hiding the mouse pointer at 308, moving the luminous part of the screen of the current file type to 310, illuminating the recently selected file type at 312 and initializing the file list at 314. At this point the modem communications software enters a routine at 316. The routine 316 is illustrated in figure 9 and includes executing a file search for the selected file type. do in 318. The modem communications software checks to see if a list of files linking to the file type exists at 320. If the answer is yes at 322, the list of linked files is destroyed at 324 because the list can be not be updated If there is no list in 326, there is no linked file list to destroy in such a way that the modem communications software finds the first file that matches the file type that has been selected in 328. Once it has been found in 328, the modem communications software creates a new link list with all file names that match the search and adds the first found file to the list at 330. Upon completion of that action, the modem communications software Find the next file that matches the file type selected in 332. In 334, the modem communications software searches for more files that can match the type of files selected. If there are files in 336, the name of the file is added to the linked list in 338 and the search is conducted once again in 332. If there are no more matching the type selected in 340, the modem communications software returns to place in the modem communications software where this routine was called at 342. As illustrated in Figure 8, once the software returns to the function at 316, the modem communications software refreshes the open file window with the The current link list of the file names matches the file selected in 344 and displays the mouse in 346. Once the mouse is displayed, the modem communications software asks if the acceptance button has been pressed in 348 and if the button has been pressed at 350, then the modem communications software sets the screen to the selected file type at 352 and returns to the software where this routine was called at 354. If the If the cancel button was pressed at 356, then the modem communications software asks if the cancel button has been pressed at 358. If the cancel button has been pressed at 359, then the modem communications software is returned to the position where this routine was called at 354. If the cancel button has not been pressed on 360, then the modem communications software repeats this circuit until either the accept or cancel button is pressed. As illustrated in Figure 10, if the initial routine 250 has been completed, then the modem communications software starts the routine 400 by checking if the print button has been pressed at 402. If the print button has been pressed at 404 , then the modem communications software prints the screen at 406. If the print button has not been pressed at 408, then the modem communications software checks to see if the hangup button has been pressed at 410. If the button of hangup has been pressed in 412, the modem communications software is disconnected at 414 from the modem and from the control board in the place of the remote compressor. After the disconnection has been executed, the modem communications software removes the online signaling at 420. If the hangup button has not been pressed at 416, then the modem communications software returns to the place in the communications software by modem where the routine was called at 418. Referring now to Figures 6 and 11, the subroutine 422 is activated when the modem communications software checks to see if the reset menu has been selected at 424. If the menu Reset has not been selected at 426, then the modem communications software returns to a place in the modem communications software where this routine was called at 428.

If the reset menu has been selected at 430, the modem communications software then checks to see if the online establishments have been selected at 432. If the online establishments have been selected, at 434, then the communications software by modem asks if the acceptance button has been pressed on 436 or the cancel button has been pressed on 438. If either of these buttons has been pressed on 440 or 442, then the modem communications software saves any change on 444 and proceeds to screen one (1) at the start of main circuit 130. If none of buttons 436, 438 has been selected at 446, then the modem communications software checks to see if the baud rate has been selected at 448. If the transfer speed button has been selected, at 450, then the modem communications software increases the speed of the If the transfer rate button has not been pressed at 452, then the modem communications software checks to see if the connection type button has been pressed at 454. If the connection type button has been selected at 456, then communication by modem increases the type of connection either direct or remote at 458.

If the connection type button was not selected in 460, then the modem communications software checks to see if the file bin button was selected in 462. If the file bin button was selected in 464, then the software modem communications will update the log file and name changes and enter them in 466. If none of the buttons 438, 448, 454 or 462 were selected, then this circuit is repeated until a button has been selected in 468. Doing reference now to Figures 11 and 12, in the case that the modem communications software receives a negative response in 470 whether the line establishments were selected in 432, then the modem communications software moves to the routine 472. In routine 472, the modem communications software asks if the modem establishment was selected at 474. If the modem establishment was selected in 476, then the modem communications software asks if the accept button in 478 or the cancel button in 480 has been pressed. If either of these buttons 478 or 480 has been pressed at 482 or 484, then the modem communications software goes to the display one (1) at the beginning of the main circuit 130 in Figure 3. If these buttons have not been pressed in 490, then the modem communications software asks if the command port gngggm ^ has been selected at 500. If the command port button has been selected at 502, then the modem communications software increments the command port number by 50. If the command port button has not been selected at 506, then the modem communications software checks whether the prefix dialing button has been selected at 508. If the prefix dialing button has been selected at 510, then the Modem communications software will update the prefix file to 512. If the prefix dialing button was not selected at 514, then the modem communications software asks if the suffix dialing button was selected at 516. If the button marked Suffix was selected at 518, then the modem communications software will update the suffix file at 520. If the suffix dialing button is not selected at 522, then the routine returns to the selected modem reset button at 474. If the modem reset button was not selected at 524, then the modem communications software starts routine 526, as illustrated in Figure 13. n 526, the modem communications software checks to see if the phone list is selected at 528. If not at 530, the circuit repeats until a button < It is pressed which allows this routine to return to the place where it was called. If the telephone list is selected at 532, then the modem communications software will search to see if the connection button has been pressed at 534. If the connection button has been pressed at 536, then the modem communications software will proceed to the connection path at 538. If the connection button was not pressed at 540, and the cancel button 542 was pressed at 544, then the modem communications software will proceed to screen one (1) at the beginning of the circuit main in 546 in both Figure 3 and 13. If none of the connection buttons or cancel button has been pressed in 548, then the modem communications software seeks to determine if the previous button has been selected in 550. If the previous pressed button has been selected at 552, then the modem communications software decreases to the telephone number if there is a previous telephone number at 554. If the previous button n or it is selected in 556, then the modem communications software searches if the next button has been selected in 558. If the next button has been selected in 560, then the modem communications software increases to the next telephone number if the following one exists telephone number 562. 1Q1 - If the button in 558 has not been selected in 564, then the modem communications software searches to determine if the add button has been selected in 566. If the add button has been selected in 568, then the communications software by modem will open the phone file window and add the new phone number to this file at 570. If the add button has not been selected at 572, then the modem communications software asks if the delete button was selected at 574. If the delete button was selected in 576, the modem communications software opens the file window and deletes the current telephone number of this file in 578. If the delete button was not selected in 580, the modem communications software ask if the edit button was selected in 582. If the edit button was selected in 584, then the modem communications software opens the file window and allows the current telephone number to be edited in 586. If the edit button was not selected in 588, then the program repeats the circuit until a button is pressed. As illustrated in Figure 14, the modem communications software asks if the data menu has been selected at 590. If the data menu has not been selected at 592, then the communications software ® et ^ *, T sm & m by modem returns to the point where this routine was called in 594. If the data menu has been selected in 596, then the modem communications software checks to see if the markers have been selected at 598. If the bookmark menu has been selected at 600, then the modem communications software displays the bookmark screen and updates the current data, if any, at 602. If the bookmark screen was not selected at 604, then the software of modem communications asks if the graphics screen was selected at 606. If the graphics screen was selected at 608, then the modem communications software checks to see if the output button has been selected at 610. If the button is output has been selected in 612, then the modem communications software returns to the main circuit input in Figure three and goes to screen one at the beginning of the main circuit at or 130. If the exit button has not been selected at 614, then the modem communications software asks if the execution button has been selected at 616. If the execution button has been selected at 618, then the modem communications software loads the graph data file at 620. If the run button was not selected at 622, the modem communications software asks if the group button has been pressed at 624. If the button group has been selected in 626, the modem communications software is sent to the alternative group setting in 628. If the group button has not been selected in 630, then the modem communications software asks if the next node button was selected at 632. If the next mode button was selected at 634, then the modem communications software decreases the node letter and displays node data at 636. If the next node button was not selected at 638, the software of communications by modem asks if the previous node button was selected in 640. If the previous node button was not selected in 642, the modem communications software increases a node letter and display certain data for this node at 644. If the previous node button was not selected at 645, the modem communications software remains in the circuit until a button either node or output is selected to exit the graph window. If the exit button is pressed at 612, then the modem communications software goes to 546. If the 606 graph screen was not selected at 646, then the modem communications software asks if the schedule screen has been selected at 648 as shown in Figure 15. If the time display has been selected at 650, 1.64 r then the modem communications software opens the schedule edit menu at 652. If the cancel button 654 has been pressed at 656, then the modem communications software returns the program to the main circuit 130 in Figure 3 at 546. If the cancel button has not been pressed at 658, then the modem communications software checks if the cell has been selected on the time display at 660. If the cell has been selected at 662, then the modem communications software will open the cell editing window and save any changes to the copy of the schedule on the edit screen at 66. If the cell was not selected on the 666 time screen, the modem communications software will check if the save button has been pressed at 668. If the save button has been pressed at 670, then the modem communications software will open the schedule file window and save the current schedule under the name specified in 672. If the save button was not pressed in 674, then the modem communications software will check if the send button was pressed in 676. If the Send button was pressed at 678, then the modem communications software will issue a schedule response message that contains the current schedule data at 680. The response message on will write any data into the archive file. data in the memory of the control board. If the send button has not been pressed at 782, then the modem communications software will ask if the reception button has been pressed at 684. If the receive button has been pressed at 686, then the modem communications software will issue a request for the schedule message of the time data in 688 and then display the message on the remote PC screen in 690. If the reception button has not been pressed, the program remains in the circuit until a button is held down . If the programmer was not selected in 692, then the modem communications software will ask if the sequencer has been selected in 694, as shown in Figure 16. If the sequencer has been selected in 696, then the modem communications software will open the sequence edit menu at 698. If the cancel button 700 has been pressed at 702, then the modem communications software will return to the main circuit 130 in Figure 3 at 546. If the cancel button has not been pressed in 704, the modem communications software will check if a cell has been selected in the sequencer screen in 706. If the cell in the sequencer menu has been selected in 708, then the modem communications software above will write the node number in the cell only by typing the new node letter in 710. If the cell has not been selected in the sequencer menu in 712, the modem communications software will check if the save button 714 has been pressed. If the save button 714 has been pressed at 716, then the modem communications software will open the sequence file window and open the current data under the name specified in 718. If the security button was not selected at 720, then the modem communications software will check if the send button was pressed at 722. If the send button 722 was pressed at 724, then the modem communications software will issue a response message with the current sequence data. The reply message will write the data in the memory of the compressor control board at 726. If the send button was not selected at 728, the modem communications software will check if the reception button was selected at 730. If the reception button was selected in 732, the modem communications software will issue a request message for the sequence messages in 734. When the data has been received, the modem communications software will display the data received on the PC screen in the remote location at 736. If none of the buttons has been pressed at 737, then the modem communications software remains in the circuit until the button to cancel is pressed at 702. If the sequencer was not selected at 738, then the modem communications software will check if the log file screen has been turned off at 740, as illustrated in Figure 17. If the logbook was selected in 742, the modem communications software will open the log file screen off and display any logoff data that may have been selected from the file menus in 744. If the cancel 746 button has been pressed in 748, then the modem communications software will return to the main circuit 130 at 546 in Figure 3. If the cancel button has not been pressed at 750, the modem communications software asks if the reception button has been pressed at 752. If the reception button has been pressed again at 754, then the modem communications software will issue all the request messages required from the memory locations on the compressor control board, which contain the. log off information on 756 and will display them on 758. If the receive button has not been pressed on 760, then the modem communications software will check if the save button has been pressed on 762. If the save button has been - pressed in 764, the modem communications software opens the logoff file window and saves the current data under the name specified in 768. If the logoff screen was not selected in 770, then the software Modem communications repeats the circuit until a button is pressed which allows this routine to return to the place where it was called at 772. As shown in Figure 18, if the connection button was pressed under the menu telephone menu selection setting, then the modem communications software will have jumped to 800. At this point, the modem communications software will initialize the modem in 802 and rev You will see that the modem has received the initialization code and return an acceptance to 803. If the modem did not respond to 804, then an error message would be placed on the screen at 806 and this routine will return to where it was called at 808. If the modem answered correctly in 810, the modem communications software checks to see if there is a dial tone in 812. If there is no dial tone in 814, then there is some error with the telephone line and this routine goes back to where it was called and an error message is displayed at 806. If a dial tone exists at 816, then the modem communications software dials a selected telephone number at 818, and this routine enters a waiting period to provide the modem at the other end. end with time to answer the phone. If the modem at the other end does not answer or if the modem can not establish contact 820, at 822, then this routine goes back to where it was called and the error message is displayed at 806. If the contact is set to 824, then the Modem communications software establishes an online signaling at 826, and the routine returns where it was called at 808. Returning now to Figure 6, the modem communications software checks to see if the user has finished with the program at 900. If the user has finished with the program at 902, then the modem communications software disables all events at 904. In 906, the modem communications software checks to see if the modem is still online at 908. If the modem it is still online 910, then the modem communications software hangs up and resets all the signals in 912 and returns to the place of the modem communications software where this routine was called in 916. S i the modem was not online in 914, then the modem communications software returns to the place of the modem communications software where this routine was called at 916. While the systems and methods described herein constitute preferred embodiments of the invention, it should be understood that the invention does not it is limited to these precise systems and methods and that changes can be made to it without departing from the scope of the invention which is defined in the appended claims.

Claims (58)

1. CLAIMS 1. A system for remotely controlling at least one machine, characterized in that the system comprises: at least one computer having a computer program with modem communications software operatively programmed in it; at least a first modem operatively connected to the computer; at least one machine having at least one control board operatively connected thereto, the computer is located at a remote location of the machine; at least one second modem operatively connected to the control board for communication with the first modem; and communication means, which operatively connect the first and second modems, to transfer data in both directions between at least one control board and at least one computer.
2. 2. The system according to claim 1, characterized in that it further comprises: a plurality of machines, each machine has a control board operatively connected to it; and network means for operatively connecting the plurality of machines to each other.
3. The system according to claim 2, characterized in that each control board includes: means, operatively connected to the network means, for communication with each of the control boards of the machine.
4. 4. The system in accordance with the claim 3, characterized in that each electronic control board continuously maintains and exchanges operating status information with each of the other control boards operatively connected to the network; and each control board maintains total information of operation status for each of the other control panels operatively connected to the network.
5. 5. The system according to claim 2, characterized in that the status system of all linked machines is transmitted to a remotely located station for monitoring and control purposes in real time.
6. 6. The system according to claim 2, characterized in that as the demand increases, a start sequence for the connected machines is transmitted in at least one of the control boards of the linked machines and the start sequence is transmits to the other machine on the network.
7. The system according to claim 2, characterized in that the plurality of machines are sequentially programmed by an operator at the remote location in such a way that the sequence assigned to a particular time will ensure that the machines operating at that time will operate as much as possible. close to a total charge as possible 5.
8. 8. The system according to claim 1, characterized in that it further comprises: at least one security means, operatively connected to the computer, to prevent installation or unauthorized use of the modem communications software installed on the computer .
9. The system according to claim 8, characterized in that at least one security means comprises: a software block key.
10. The system according to claim 9, characterized in that the software block key is a hardware device that is operatively connected to a printer port placed in the computer.
11. 11. The system according to claim 8, characterized in that at least one security means comprises: the serial number of at least one of the machines that is embedded within the software of 25 communications by modem supplied to an end user.
12. 12. The system in accordance with the claim 11, characterized in that when the modem communications software is running on the computer, it establishes communications with at least one machine at the remote location, the modem communications software requests at least one serial number from at least one of the machines .
13. 13. The system in accordance with the claim 12, characterized in that if at least one of the serial numbers can not be obtained, the modem communications software immediately breaks the electronic connection with the modem in the remote location.
14. The system according to claim 12, characterized in that, if at least one of the received serial numbers does not match one of the authorized serial numbers embedded in the modem communications software, the modem communications software it immediately breaks the electronic connection with the modem and the remote location.
15. 15. The system in accordance with the claim 2, characterized in that with the modem communications software, the operator can monitor each machine that has a control board in the network of machines by means of at least a second modem operatively connected to a control board operatively connected to so minus one of the machines in the network.
16. 16. The system according to claim 15, characterized in that with the modem communications software, an operator can monitor up to sixteen machines in a single network.
17. 17. The system according to claim 1, characterized in that the modem communications software is capable of removing all the information available in at least one control board.
18. 18. The system according to claim 17, characterized in that the available information comprises: hours in Charge operation, hours in Discharge operation, hours of Air filter, hours of Fluid filter, hours of Separator element.
19. The system according to claim 17, characterized in that the available information comprises: the condition of the Air filter, the condition of the Fluid filter, and the condition of the Separator element.
20. 20. The system according to claim 1, characterized in that at least one computer can access a shutdown log for a single machine or any of a plurality of machines in a machine index, display the history of the machine shutdown, save the shutdown history in a file, or print the shutdown history in the remote location.
21. 21. The system according to claim 2, characterized in that the modem communications software installed in the remote computer includes: means to modify the sequence and time information of the linked machines.
22. 22. The system in accordance with the claim 21, characterized in that the modifying means further comprise: means for removing the sequence and time information of any machine in the network; means for saving or modifying the sequence and schedule information; and means for transmitting the sequence and schedule information back to the machine network through at least a first modem and at least the second modem to the control board connected thereto.
23. 23. The system in accordance with the claim 22, characterized in that by using the modem communications software, the machines in a network can be selectively downloaded and turned off by setting a sequence that does not include that specific machine programming the newly programmed sequence for a day and time of the week in which the machine is switched off.
24. 24. The system according to claim 23, characterized in that when that scheduled day and time are reached, any machine that is not included in the instruction sequence is turned off and is not allowed to run until it is included in a sequence that is scheduled at a later time.
25. 25. The system in accordance with the claim 24, characterized in that such remote programming allows the machines to be selectively unloaded when there is no demand for the selected machines, or during periods of high electrical peak demand when there may be a fine of money if a machine is not needed and it starts to work due to pressures of fluctuating installation air.
26. 26. The system according to claim 2, characterized in that all the operating parameters of each of the plurality of machines can be remotely modified by commands initiated by the modem communications software and communicated to each of the plurality of machines through at least the first and at least the second modem.
27. 27. The system according to claim 26, characterized in that the modifications comprise: the pressure settings of the machine loading and unloading, the Auto-Dual timer setting, the target pressure setting, the time and date settings, the operating mode and / or the number of vertical movement valves that open or close.
28. 28. The system according to claim 1, characterized in that the modem communications software further comprises: alarm means, operatively placed in the remote location, to notify an operator if he must turn off the machine for a reason other than the programmed shutdown.
29. 29. The system according to claim 28, characterized in that the alarm means provide a description of the cause of the unscheduled shutdown in the 10 remote place.
30. 30. The system according to claim 2, characterized in that the modem communications software also includes: means for analyzing the data collected from each machine to establish a usage trend.
31. The system according to claim 30, characterized in that the usage trend is used to automatically establish and adjust a network of machines in such a way that appropriate sequences and schedules are generated in 20 the remote place and they are transmitted back to the network of machines.
32. 32. The system according to claim 1, characterized in that the machine is a compressor and the modem communications software further comprises: means for buffering and recording the amount of ,, ^ t. jk * * &^ * Jh * 8 demand for compressed air placed in the compressor over time.
33. 33. The system according to claim 32, characterized in that the monitoring and recording means 5 comprise: means for efficiently using the energy of the machines in such a way that it reduces the energy consumption.
34. 34. A method for remotely controlling at least one machine, the method being characterized in that it comprises: providing at least one computer having a modem communications software computer program operatively programmed therein; 15 operatively connect at least a first modem to the computer; providing at least one machine having at least one control board operatively connected thereto, the machine is located at a remote location of the computer; operatively connect at least one second modem to the control board; and operationally connect at least the first modem and at least the second modem in such a way that the 25 data are transferred on at least one control board and How are you? 20 at least one computer in both directions.
35. 35. The method of compliance with the claim 34, characterized in that it comprises the steps of: providing a plurality of machines, each machine having a control board operatively connected thereto; and providing network means for operatively connecting the control boards of the plurality of machines to each other.
36. 36. The method of compliance with the claim 35, characterized in that it further comprises the step of: communicating with each of the control boards operatively connected to the network means.
37. 37. The method according to claim 34, characterized in that each control board operatively connected continuously maintains and exchanges operating status information with all the other plurality of control boards of the machines in the network; and each control panel maintains complete information about the operation status of all the other control boards in the network.
38. 38. The method according to claim 35, characterized in that it also comprises the step of: transmitting status information of all the linked machines to the remotely located computer for the purpose of monitoring and control in real time.
39. 39. The method according to claim 35, characterized in that it also comprises the step of: sequentially programming in remote Play, in such a way that the sequence assigned to the particular time will ensure that the machines operating at that time will be operating as close as possible. to the total load as possible.
40. 40. The method according to claim 34, characterized in that it also comprises the step of: operatively connecting at least one security means, to the computer to avoid the unauthorized use or installation of modem communications software installed on the computer .
41. 41. The method according to the claim 40, characterized in that it also comprises the step of: operatively connecting a software blocking key to a printer port in the computer.
42. The method according to claim 40, characterized in that it further comprises the step of: embedding the serial number of at least one machine within the modem communications software supplied to an end user.
43. 43. The method according to claim 42, characterized in that it further comprises the step of: after establishing communications with at least one machine, requesting at least one serial number from the control board operatively connected to the second modem.
44. 44. The system according to claim 35, characterized in that it further comprises the step of: monitoring each of the pluralities of machines that have a control board in the network of machines via the second modem operatively connected to at least one from 10 the control panels operatively connected to at least one of the machines in the network.
45. 45. The method according to claim 34, characterized in that it also comprises the step of: removing all available information in a control board.
46. 46. The method according to claim 45, characterized in that the step of removing comprises the steps of: removing hours in loading operation; 20 withdraw hours in Download operation; Remove hours of Air filter, remove hours of Fluid filter, and remove hours of Separator element.
47. 47. The method according to claim 25 34, characterized in that it also comprises the steps of: ¡AaáÉ? Lg? § You can access a shutdown log for a single machine or any machine in a network; display the history of shutdown of the machine; and save the history to a file, or print the shutdown history in place of the computer.
48. The method according to claim 35, characterized in that it also comprises the step of: modifying the sequence and time information for the linked machines.
49. 49. The method of compliance with the claim 35, characterized in that they also comprise the steps of: removing the sequence and schedule information of any machine in the network; save or modify the sequence and schedules; and transmit the sequence and times of return to the network of machines through at least a first modem and at least the second modem to the control panel operatively connected to it.
50. The method according to claim 34, characterized in that it also comprises the steps of: selectively downloading and shutting down the machines by establishing a sequence that does not include the specific machine; and program the sequence recently programmed for a day and time of the week in which t'al off of the machine is desired.
51. 51. The method according to claim 34, characterized in that it further comprises the steps of: remotely modifying all operating parameters of at least one machine by means of commands initiated by the modem communications software in the computer; and communicating the modifications to at least one machine through at least the first and second modems.
52. 52. The method of compliance with the claim 51, characterized in that it also comprises the step of: if at least one of the machines must be switched off for a reason other than the programmed shutdown, activate an extension in the place of the computer.
53. 53. The method of compliance with the claim 52, characterized in that the step of activating the alarm comprises the step of: providing a description of the cause of the unscheduled shutdown.
54. 54. The method of compliance with the claim 3, characterized in that it also comprises the steps of: analyzing the data collected from at least one machine; and establish a usage trend based on them.
55. 55. The method according to claim 54, characterized in that the step of establishing comprises: automatically establishing and adjusting a machine network; 5 generate appropriate sequences of hours in the place of the computer; and transmit the schedule sequences back to the machine.
56. 56. The method according to claim 10 34, characterized in that it also comprises the step of: monitoring and recording how much demand is placed on at least one machine with the passage of time.
57. 57. The method according to claim 34, characterized in that it also comprises the step of: efficiently using the energy of the machine in such a way that the energy consumption can be reduced.
58. 58. A system for remotely controlling at least one machine, the system is characterized in that it comprises: at least one computer having a modem communications software computer program operatively programmed therein; at least a first modem operatively connected to the computer; 25 a plurality of machines, each machine has at least one control panel operatively connected to it, the computer is located in a remote place of the machine; network means for operatively connecting the control boards of the plurality of machines to each other; and communication means, which operatively connect at least the first and second modems, to transfer data in both directions between at least one control board and at least one computer.