JP2001014009A - Starting system for application software, its starting method, and recording medium on which program for starting the same is recorded - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start desired application software to a different kind of PLC according to an operating state, etc. SOLUTION: In this starting system, a communication protocol at an exclusive network 5 between a PLC 3 and a programmable display 2 is converted into a communication protocol at a common network 4 between the programmable display 2 and a personal computer 1 by using data for converting protocol of a converted data storage part 2f at a data processing part 2a. In addition, when a distributing condition preset in a data distributing part 2g is established by a distribution setting part 1c, the application software preliminarily specified in an application part 1f is stared by a data communication processing part 1a. For example, generation of abnormality of the PLC 3 is provided as the distributing condition and when word processor software is started as the application software, a file in which a message of generation of the abnormality is prepared is opened and the message is displayed on a personal computer 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and method for starting various application software in association with the operation of an industrial control device such as a programmable logic controller, and a recording medium on which a program for starting the program is recorded. It is about.

[0002]

2. Description of the Related Art An industrial control device called a programmable logic controller (hereinafter, referred to as a PLC) is used to implement various controls such as a sequence control, such as a belt conveyor type automatic assembling machine. It is widely used as a control device for controlling a target system. Further, in recent years, with the complexity of the target system, the introduction of a network control system in which a plurality of PLCs are connected to each other via a network line has been spreading.

In such a network control system, display of the operation status of each PLC and control instructions to the PLC are performed by a display device having a control function such as a programmable display disposed near the PLC. Further, in the above control system, even in a place away from the PLC and the display device, the operation status of the PLC can be monitored and the PLC can be monitored.
The host computer installed in such a place can also participate so that the above-mentioned control can be performed.

In the above control system, for example, as shown in FIG. 7, PLCs 101... Are positioned at the center of control, and each PLC 101 has input / output devices such as sensors and actuators arranged at various parts of a target system. A device 102 is connected to a display device 103 such as a programmable display device for performing display and control instructions.
Further, another PLC 101 or host computer 104 is directly connected to the PLC 101 via a predetermined interface circuit or indirectly via a dedicated adapter. Data transfer between the PLC 101 and the host computer 104 and between the PLCs 101 is performed using the communication function of the PLC 101.

In such a control system, in the operation of the system, the operation state of the PLC 101 is monitored, and if necessary, the host computer 104 which performs centralized control of the control system gives a work instruction or an abnormality to the administrator. May inform. For this reason, conventionally, for example, using software that can access the PLC 101 from the host computer 104, the operating state of the PLC 101 is constantly monitored, and when an occurrence of an abnormality or the like is confirmed, application software (for example, (Eg, word processor software that creates characters and sentences).

[0006]

Generally, the PLC 101 often uses different communication protocols for data communication for each model (for each manufacturer or even for the same manufacturer even for each product). Therefore, in the above control system,
P is used both between each PLC 101 and the host computer 104 and between the PLC 101 and the display device 103.
It is necessary to communicate using a communication protocol specific to the LC 101. As a result, a problem arises in that it is not easy to use different types of PLCs 101.

More specifically, since it is necessary to prepare a communication protocol for communicating with the PLC 101 in both the host computer 104 and the display device 103, it is necessary to manufacture and maintain the host computer 104 and the display device 103. It takes time and effort.

When the degree of difference between the communication protocols is small, the communication protocols necessary for establishing communication, such as a start character, a stop character, and a method for designating a transmission / reception address, are the same and are not so important. If only the command is different, the PLC 10
If a different command is not used by limiting the function actually used among the functions of the PLC 1, the PLC 1 of a different model is used.
It is not impossible to use 01 in combination. However, when an important command such as a command for communicating with a plurality of models is different, the host computer 104 and the PLC
Even if communication is established with the host 101, the host computer 104 cannot instruct the PLC 101 to perform a desired operation.

In addition, when the communication protocol itself required for establishing the communication is different, not only communication between the PLC 101 having different communication protocols and the host computer 104 is not established, but also the PLC 101 having the same communication protocol. Communication with the host computer 104 is hindered. Therefore, the PLC 101
Is required, a converter must be inserted into the network, and the communication protocol must be mutually converted so that the PLC 101 can be seen by the host computer 104 and other PLCs 101 as the same model. However, in the control system as described above, in general, not only the place where the converter can be installed is often limited, but also the cost of the entire control system increases with the addition of the converter. Further, since there are a large number of communication protocols of the PLC 101, for example, 100 types or more, a desired converter corresponding to those communication protocols does not always exist.

Therefore, in a control system in which the PLC 101 is arranged at the center of communication, it is difficult to use different types of PLC 101 together, and the choices when selecting the PLC 101 are limited. For this reason, conventionally, in a control system, the PLC 101 of the same model is often used.

Further, since the PLCs 101, which are positioned at the center of control, process most of the communication in the control system, the load on the PLCs 101 increases. More specifically, the PLC 101 has been developed from a sequencer using a relay, and has been used for I / O control such as on / off control of a switch and data acquisition from a sensor.
Since it is good at processing related to O-control, the ability to process communication of the control system as described above is often insufficient, and even if the ability is not insufficient, the burden is large. For example, if only the target system is to be controlled, the PLC 101 usually requires a storage capacity of about several tens of kilobytes and a processing capacity according to the storage capacity. It is difficult to process this communication at a sufficient speed.

As described above, in the conventional control system, the host computer 1 is
There is a problem that the control data cannot easily be transferred from the PLC 04 to the different types of PLC 101. Also,
In the above control system, it is necessary for the user to create a program for activating any application software in accordance with the operation state of the PLCs 101... In addition, even if the above-described software capable of accessing the PLC 101 from the host computer 104 is used, the host computer 104 on which the software is installed may be used.
In addition, it is necessary to always inquire about the operation state of the PLC 101, and the efficiency of data communication is not so good.

The present invention has been made in view of the above-described problems, and does not require the creation of a new program by dedicated software or a user, and allows an arbitrary PLC to be operated in accordance with the operation state of a different type of PLC. It is an object of the present invention to provide a start-up system and a start-up method for application software capable of starting application software, and a recording medium on which a program for starting the application software is recorded.

[0014]

In order to solve the above-mentioned problems, an application software activation system according to the present invention displays a control device to which an input device and an output device are connected and a control state of the control device. And an application software activation system that activates application software in the host computer by performing communication between a display control device that gives a control instruction to the control device and a host computer provided above the display control device. Wherein the host computer and the plurality of display control devices perform communication using a common communication protocol via a common network, while the display control device and the control device communicate via a dedicated network. Communication is performed using a communication protocol specific to the control device. A protocol conversion unit that converts the communication protocol used in the two networks into a communication protocol used in the two networks, and a condition set in advance when a predetermined condition is satisfied. Notifying means for notifying the host computer of the information of the above, when the host computer receives the information on the condition from the notifying means, has a starting means for starting the application software specified in advance It is characterized by having.

In the above arrangement, the protocol conversion means converts the communication protocol of the common network into the communication protocol of the dedicated network, while converting the communication protocol of the dedicated network into the communication protocol of the common network. Accordingly, the display-type control device can always communicate with the host computer via the common network using the same communication protocol regardless of the communication protocol of the control device. As a result, even if control devices having different communication protocols coexist in the control system including the control device, the display control device, and the host computer, the host computer obtains information on the control device via the display control device. be able to.

Further, when a preset condition (such as occurrence of an abnormality in the control device transmitted from the control device) is satisfied, information about the condition is notified to the host computer by the communication means. In the host computer, the activation means activates application software specified in advance. Thus, for example, when the application software is started in accordance with the operation state of the control device, the host computer does not need to inquire the control device about the operation state, and the application software is automatically started when the above condition is satisfied. can do. Since communication is possible regardless of the communication protocol, data can be easily exchanged between the started application software and the control device.

According to the present invention, there is provided a method for starting application software, comprising: a control device to which input devices and output devices are connected; a display-type control device which displays a control state of the control device and gives a control instruction to the control device. An application software method system for starting application software in the host computer by communicating with a host computer provided above the display control device, wherein the host computer and a plurality of the display control devices are provided. Communication between the display-type control device and the control device using a communication protocol unique to the control device via the dedicated network, while performing communication using a common communication protocol through a common network with the control device. Communication is performed, and in the display-type control device, While converting the communication protocol used in both networks into the communication protocol used in both networks, and when a preset condition is satisfied, it notifies the host computer of information about the condition, and the host computer The computer is characterized in that, upon receiving information on the above conditions, application software designated in advance is started.

Also in this starting method, in the display-type control device, the communication protocol between the host computer and the display-type control device is mutually converted with the communication protocol between the display-type control device and the control device. Accordingly, the display-type control device can always communicate with the host computer via the common network using the same communication protocol. Therefore, the host computer can obtain information on the control devices having different communication protocols through the display control device.

Further, when information about the preset condition is satisfied to the host computer when the preset condition is satisfied, the host computer starts application software specified in advance. This eliminates the need for the host computer to constantly monitor the operation state of the control device, and can automatically start the application software if the above condition is satisfied. Further, data can be easily exchanged between the activated application software and a control device having a different communication protocol.

According to the present invention, there is provided a recording medium in which a program for starting application software is recorded, in order to solve the above-mentioned problems, a control device to which input devices and output devices are connected, and a control state of the control device. Is displayed, and communicates with a display-type control device that gives a control instruction to the control device using a communication protocol specific to the control device via a dedicated network, and is provided above the display-type control device. Recording a program for starting application software in the host computer by causing a communication between the host computer and the plurality of display-type control devices using a common communication protocol through a common network. A medium, in the display-type control device, used in both networks. The communication protocol is converted to the communication protocol used in the two networks, and when a preset condition is satisfied, information about the condition is notified to the host computer. It is characterized in that a program for starting application software specified in advance when information on conditions is received is recorded.

According to the program recorded on the recording medium, the display-type control device converts both communication protocols used in the common and dedicated networks into each other, so that the communication between the display-type control device and the host computer is performed. Can always be performed using the same communication protocol. Therefore, the host computer can obtain information on the control devices having different communication protocols through the display control device.

When information about the preset condition is satisfied to the host computer when the preset condition is satisfied, the host computer starts application software specified in advance. This eliminates the need for the host computer to constantly monitor the operation state of the control device, and can automatically start the application software if the above condition is satisfied. Further, data can be easily exchanged between the activated application software and a control device having a different communication protocol.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a control system according to this embodiment.
, A personal computer (hereinafter, referred to as a personal computer) 1, a plurality of programmable displays (hereinafter, referred to as a display) 2, and a plurality of PLCs 3.

The personal computer 1 and the display units 2 are connected to each other via a common network 4 capable of performing communication using a common communication protocol. On the other hand, the display 2 and the PLC 3 are individually connected via a dedicated network 5 capable of performing communication using a unique communication protocol for each PLC 3.

In a broadly defined communication protocol, codes indicating start characters and end characters, transmission / reception timing of each character, a method of specifying a transmission destination and a transmission source, and the like are unified in a network including a transmission source and a transmission destination. If the communication protocol cannot transmit data normally if it is not, the operation desired by one and the operation performed by the other, if the transmission source and the destination are not unified, such as a command system that each PLC 3 can understand, will match. There is a communication protocol that cannot be controlled normally without the communication protocol. Therefore, in the following description, a combination of the two is referred to as a communication protocol, and when the two need to be distinguished, the former is distinguished as a transmission protocol and the latter is distinguished as a command system.

Here, in the communication protocol specified by the manufacturer of each PLC 3, when instructing to read data,
Generally, as shown in FIG. 2, a control code (ESC) indicating that the code to be transmitted next is a command, and a PLC
Command code (R
D), a read start address (X0001), a read size (5), and a control code (R
Data train DT ₁ comprising ET) and is transmitted. However,
Between the PLCs 3, not only the command system including the command code but also the arrangement order of the address and the size, the control code itself, or the expression method for expressing the address and the size (the bit width and the character for indicating the numerical value are indicated. Code types) are often different from each other.

Therefore, in this embodiment, the display 2
When performing data communication via the common network 4, regardless of the communication protocol transmitted over the dedicated network 5, the communication protocol ( Common protocol). Specifically, in the present embodiment, as the common network 4,
A local area network (LAN) such as Ethernet (trademark: Xerox Corporation) is used, and TCP / IP is used as a communication protocol in the common network 4.
Has been adopted.

For this reason, each display 2 and personal computer 1 connected to the common network 4 are assigned a unique IP address, and when communicating via the common network 4, as shown in FIG. In addition, TCP / I
Receive defined format data sequence DT ₂ in P. This data string DT ₂ includes a header section 11 including the IP addresses of the transmission source and the transmission destination, and a data body 12 indicating the communication contents.
And Thus, for example, even when a computer or the like used by a control system developer is connected via a telephone line from a location different from the control system operating company, a communication device capable of communicating by TCP / IP is used. If it exists, it is possible to freely participate in the common network 4 without obstructing data transmission between other communication devices.

Further, in the common protocol, a common code 13 indicating the content of the command is included in the data body 12r when transmitting a command instructing data reading to the PLC 3.
And the related information 14 accompanying the common code 13 includes a read start address 14a and a read size 14b. Further, the data body 12 w when instructing the data write includes the write start address 14 c and the write data 14 d as the related information 14.

The common code 13 is a command code (each PL) in the dedicated network 5 between commands which can be understood by each PLC 3 and which have the same contents.
Irrespective of the command code in C3). In addition, for example, the order in which the data in the related information 14 is transmitted, such as the read start address 14a and the read size 14b, and the expression method at the time of transmission are unified regardless of the communication protocol in the dedicated network 5. Accordingly, in the common protocol, the command to be executed can be uniquely specified regardless of the type of the PLC 3 connected to the display 2.

The PLC 3 as a control device includes a CPU / power supply module, an input unit, and an output unit. The CPU / power supply module includes a CPU unit including a CPU and a memory, and a power supply unit that supplies power to each unit of the PLC 3. In accordance with the control program, the CPU unit receives input devices (in the figure, I
/ D) 6 based on a signal input from the input device, and performs a calculation process of recipe data (control data) given to an output device (O / D in the figure) 7. The input unit and output unit are
A portion having an interface function connected to the input device 6 and the output device 7, respectively, and exchanges a digital signal or an analog signal input / output with these devices with the CPU unit. .

As the input device 6, devices such as sensors (temperature sensors, optical sensors, etc.) and switches (push button switches, limit switches, pressure switches, etc.) are used. As the output device 7, an actuator, a relay, a solenoid valve, a display, or the like is used. These input devices 6 and output devices 7 are arranged in required parts of various target systems such as a production line.

The display 2 as a display-type control device has a RA
It has memories such as M, ROM, flash ROM, and VRAM, and an arithmetic processing unit such as a CPU, and controls the operation of each unit of the display 2 by these. The display 2 includes a data processing unit 2a, interface units (I / Fs in the figure) 2b and 2c, an input unit 2d, a display unit 2e, a converted data storage unit 2f, and a data distribution unit 2g.

The data processing section 2a performs various data processing for controlling display of a control screen, converting a protocol, and performing data distribution. This data processing unit 2a
Software that can be provided in the form of program media as package software,
Is downloaded to the display unit 2 from. Further, this software may be installed in the display 2 in advance at the time of shipment of the display 2 as necessary.

As for display control of the control screen, the data processing unit 2a draws the control screen on the display unit 2e using a VRAM or the like based on the screen data created by the personal computer 1. In the control screen, an image in which the input device 6 and the output device 7 are designed is synthesized as a component on a background screen imitating the target system. In the control screen configured in this way, the components are
The operation status of the input device 6 and the output device 7 is visualized.

Here, the program medium is a recording medium which is configured to be separable from the personal computer 1 and the display 2, and is a tape system such as a magnetic tape or a cassette tape, a magnetic disk system such as a floppy disk or a hard disk, Optical disc system of optical disc such as CD-ROM, MO, MD, DVD, etc., card system such as IC card (including memory card), optical card, or mask RO
A medium that fixedly holds a program, including a semiconductor memory such as an M, EPROM, EEPROM, or flash ROM, may be used.

Further, since the control system according to the present embodiment has a system configuration that can be connected to a communication network including the Internet, it is a medium that carries the program in a fluid manner so as to download the program from the communication network. Is also good. However, when the program is downloaded from the communication network as described above, the download program may be stored in the personal computer 1 in advance, or may be installed from another recording medium.

The protocol conversion process is performed on both networks 4
If the communication protocols in 5 are different from each other, this is a process of converting one communication protocol to the other communication protocol with reference to the data stored in the conversion data storage unit 2f. In the data distribution process, when a preset distribution condition is satisfied, output data taken from the input device 6 into the memory of the PCL 3 and output from the PLC 3 is distributed to the personal computer 1 or another display device 2, The recipe data set by the personal computer 1 is displayed on each PLC 3 via the display 2.
This is the process of delivering to

The interface section 2b is connected to a common network 4 for performing communication between the personal computer 1 and another display device 2. By communication via the common network 4, recipe data from the personal computer 1 is transferred from each display 2 to the PLC 3, or one PLC
The output data from the display 3 is transferred from the display 2 to the personal computer 1 or another display 2. On the other hand, the interface unit 2c is connected to the dedicated network 5 for performing communication with the PLC 3. The above-described recipe data and output data are exchanged between the display 2 and the PLC 3 by the communication via the dedicated network 5.

The input section 2d is constituted by an input device such as a touch panel for inputting on the display screen of the display section 2e. For this reason, the display unit 2e is configured by a flat display element such as a liquid crystal panel or an EL panel.

The conversion data storage unit 2h stores data required for protocol conversion processing. This data may be in any format as long as the communication protocol can be mutually converted between the dedicated network 5 and the common network 4. The converted data storage unit 2h according to the present embodiment is transmitted through the dedicated network 5. A data transfer format FMT indicating the format of the data;
• Stores a command conversion table TBL indicating the correspondence between command codes transmitted in 5.

[0043] Specifically, as shown in FIG. 2, the data transfer format FMT is in data string DT ₁ transmitted in the dedicated network 5, e.g., data content itself to read or write, the size of the data, read and write Is a skeleton-like data string in which a portion that changes according to the data content to be actually transmitted, such as an address, is undefined, and only the purpose is defined for the undefined portion. If the command area is undefined, the data transfer format FM extracted from the data string actually transmitted is used.
If T is common to a plurality of commands, the command area may be undefined, and a common data transfer format FMT may be used between these commands.

The command conversion table TBL includes
As shown in FIG. 4, the correspondence between the common code transmitted on the common network 4 and the command code transmitted on the dedicated network 5 is stored. Data processing unit 2a
Converts one code to the other code based on the command conversion table TBL (for example, TBLa and TBL).
Between BLb).

The data distribution section 2g distributes recipe data set in the personal computer 1 and output data from the PLC 3 to designated distribution destinations when a preset distribution condition is satisfied. Further, the data distribution unit 2g notifies the personal computer 1 of the fact that the preset distribution condition is satisfied and the fulfilled distribution condition. For this reason, in the data distribution unit 2g, the node information on the distribution destination node and the setting information on the distribution are downloaded from the personal computer 1 and stored in advance. The setting of the distribution condition will be described later in detail.

Personal computer 1 as host computer
CPU, memory (R)
It has an external storage device (hard disk drive, MO drive, etc.), a display device, and an input device (keyboard, mouse, etc.). As shown in FIG. 1, the personal computer 1 includes a data communication processing unit 1a,
Interface unit (I / F in the figure) 1b, distribution setting unit 1c, network file 1d, data file 1
e, an application section 1f and a recipe information file 1g.

The interface section 1b is connected to the common network 4 for performing communication with the display 2.

The data communication processing section 1a is a section for performing data communication processing with the display devices 2 via the common network 4 and for exchanging data with the application section 1f. This data communication processing unit 1a
In order to transfer screen data created in the personal computer 1 with drawing software (not shown) to the display 2 or to distribute recipe data set in the application 1f from the display 2 to the PLC 3, for example, A process of reading recipe data from 1f and taking output data from the PLC 3 into the application unit 1f and collecting the data is performed.

The data communication processing section 1a is software that can be provided in the form of program media as package software, and is installed in the personal computer 1 in advance. This program medium is also a recording medium that is configured to be separable from the personal computer 1 and the display 2, similarly to the above-described program medium.

Further, the data communication processing unit 1a receives various application software installed in the application unit 1f (hereinafter simply referred to as an application) when a predetermined distribution condition is satisfied as described later. A predetermined application is started (starting means). Therefore, the data communication processing unit 1
a provides a screen for specifying an application to be started, as described later.

As the application section 1f, for example, word processor software, audio reproduction software, communication software, spreadsheet software, and database software are installed. The word processor software is used to create a message for notifying information on the occurrence of an abnormality from the PLC 3 and a work instruction. Voice reproduction software is used to reproduce these messages by voice.
The communication software is used for automatically dialing a designated telephone number and transmitting the above message to a pager or a mobile phone. The spreadsheet software is used to record and save output data from the PLC 3, to perform statistical processing, or to perform graph processing. Database software is PLC
3 is used to set the recipe data to be given.

The application section 1f is not limited to the above-mentioned various software, but may be any other application (commercially available application or user application) as long as it performs processing relating to the operation status of the PLC 3. In addition, the above various software,
It may be used for purposes other than the above.

The above-described screen provided by the data communication processing section 1a includes, as shown in FIG.
Includes “startup option”, “current folder”, “automatic station name assignment”, and “write data assignment”.

The “starting application” is a column for designating an application to be started. In this column, the name of the application is written. The application specified here must accompany the executable file. The “startup option” is a column for specifying a file to be executed by the application to be started, and a file name as a start switch is written in this column. In addition, EXCEL.e may be used as a start switch according to the application to be started.
xe (Microsoft Excel spreadsheet software
(Executable file of (registered trademark)) or the like can be set. The “current folder” is a column for entering the name of a folder in which the above file is stored.

"Automatic assignment of station name" means that the name of the station (display unit 2) that is the notification source is added as data to the notification information notified from the display unit 2 that the distribution condition is satisfied. Is a check box for selecting. “Add write data” is a check box for selecting to add, to the above-mentioned notification information, code data in which a distribution condition serving as a trigger for activating an application is coded for each event.

The distribution setting section 1c sets node information and distribution information. The node information includes a node in the common network 4 and a type of the display 2 connected to the node. The distribution information includes a symbol name of a device (input device 6 and output device 7) connected to each PLC 3, a data distribution timing for each display 2, a store address of data to be distributed, a store address of received data, and the like. Contains. These node information and distribution information are stored in the network file 1d and downloaded to the data distribution unit 2g of each display 2 as needed. The distribution setting unit 1c is software that can be provided in the form of program media as package software, and is installed in the personal computer 1 in advance. This program medium is also a recording medium that is configured to be separable from the personal computer 1 and the display 2, similarly to the above-described program medium.

The distribution information is set on a setting screen as shown in FIGS. 6A and 6B. The setting screen is provided with “distribution conditions” and “distribution stations / reception stations”.

The "distribution conditions" shown in FIG. 6A include, as conditions for determining the distribution timing, power-on, time designation, cycle designation, rewrite trigger, ON period, OFF period, rising trigger and falling trigger. Is provided.

"Power on" is a condition for performing distribution when the display 2 is powered on, and "Time designation" is a condition for performing distribution at a designated time. The “cycle specification” is a condition for performing distribution at each desired cycle, and the “rewrite trigger” is
This is a condition for performing distribution when output data is rewritten, that is, when output data changes. "ON period"
And the "OFF period" are conditions for continuously performing distribution in each of the ON period and the OFF period of the device, and the "rising trigger" and the "falling trigger" are output data (designated device output). This is a condition for performing distribution when each of the rising edge and the falling edge is detected.

In the lower area of the distribution condition setting screen, there is provided a column for inputting a symbol name of a device to be designated with respect to a condition based on a device output among the above conditions. Further below, there are provided a cycle (in units of ms) for checking distribution conditions, a setting column for a distribution period, and a setting column for a process of returning a device output to OFF or ON after distribution. . However,
The check cycle is valid only for the distribution conditions of “power on”, “time setting”, and “cycle specification”, and the period limitation is valid only for the distribution condition of “cycle specification”. Also,
For the setting to return the device output to OFF after distribution,
This is valid only for the “trigger trigger” distribution condition. If this box is not checked, the device output will remain
N remains. On the other hand, device output is turned on after distribution
Is valid only for the distribution condition of “falling trigger”. If this column is not checked, the device output remains OFF after distribution.

On the other hand, the "distribution station / reception station" shown in FIG. 6B is provided with an information entry section for the distribution station and the reception station. The information of the distribution station includes a device name (here, the file name described above) as an output source of the recipe data distributed from the personal computer 1, a symbol name of the device as an output source of the output data distributed from the display 2, and And the number of data to be delivered in the specified period. Also,
The information of the receiving station is stored in the PL corresponding to the display 2 serving as the receiving station.
Contains the symbol name of the device connected to C3.
However, when the personal computer 1 is the receiving station, the name given to the file created by the application unit 1f is used as the symbol name.

In the data file 1e, the above-mentioned protocol conversion data to be stored in the conversion data storage unit 2f is registered in advance. The converted data is downloaded to the required display 2 via the data communication processing unit 1a at the time of initial setting or at the time of maintenance such as when the PLC 3 connected to the control system is changed.

In the control system configured as described above, when the data sequence DT ₂ of the common protocol is received via the common network 4, the data processing unit 2 a
Extracts a common code 13 indicating a command to be transmitted to the PLC 3 and related information 14 from the data body 12.
Further, the data processing unit 2a outputs the command conversion table T
With reference to the BL, a command code that can be transmitted in the dedicated network 5 and corresponds to the common code 13 is selected. If necessary, the expression method of the related information 14 is converted to an expression method transmitted on the dedicated network 5. As a result, commands to be transmitted to the PLC 3
When the data content itself, the data size, the address, and the like are determined, the data processing unit 2a can generate a data sequence to be sent to the PLC 3 with reference to the data transfer format FMT.

On the other hand, when receiving the data string DT ₁ from the PLC 3, the data processing unit 2 a applies the command indicated by the data string, the data content itself, the data size and address, etc. to the data transfer format FMT. extracted, converted into the data string DT ₂ common protocol in the reverse order to the above.

The combination (protocol information) of the data transfer format FMT and the command conversion table TBL is set in accordance with the communication protocol of the PLC 3 before the display 2 and the PLC 3 communicate control-related data. PLC adopting
When 3 is connected, its protocol information is switched. For example, in FIG. 4, when the PLC 3 of the model A is changed to the PLC 3 of the model B, the command conversion table TBL
Switching from a to the command conversion table TBLb.

The communication protocol may be selected, for example, by the user operating the personal computer 1 or the display 2. Further, the display 2 sends a command capable of specifying the communication protocol of the PLC 3 to the PLC 3 while sequentially selecting communication protocols that the display 2 itself can send, and the PLC 3
The communication protocol may be automatically determined based on the response code from. The display 2 may store the above protocol information for all communication protocols adopted by the PLC 3 that can be connected to itself.
Only the communication protocol of the currently connected PLC 3 may be stored, and the communication protocol may be downloaded from the personal computer 1 or via a recording medium by various methods as necessary.

As described above, by generating the data string DT ₁ to be transferred to and from the PLC 3 in real time during the operation of the control system, the display 2 can display the input data without asking where it came from. , PLC3, and can respond immediately without stopping the control system even if the PLC3 is changed.

As described above, in the present control system, unlike the conventional control system, the indicators 2 are arranged at the center of communication, and the indicators 2 are connected to the common network 4 and the dedicated network 5. Connected to both sides. Further, when the communication protocols in the two networks 4 and 5 are different, the display 2 converts the respective communication protocols to each other, and connects between the PLC 3 connected to itself and the personal computer 1 or another display 2. Relay communications. Thereby, even if the communication protocols adopted by the PLCs 3 connected to the respective display units 2 are different from each other, communication can be performed between each display unit 2 and the personal computer 1 by using a common communication protocol.

More specifically, the target system includes an input device 6 such as a flow rate sensor, a temperature sensor, or a sensor for detecting the state of each part of the target system, and an output device such as a valve or a motor that operates according to an instruction. The input / output devices 6 and 7 are controlled by the PLC 3. In addition, PLC3 has a unique communication protocol for each model of PLC3, for example, for each manufacturer or each product type, due to the history of development from a sequencer. Therefore, the PLC 3 connected to the display 2 via the dedicated network 5 communicates with the display 2 using a communicable communication protocol.

As a result, the PLC 3 is connected to the display 2 or to another display 2 or the personal computer 1 via the display 2.
While transmitting the data acquired by the input device 6 as output data of the PLC 3, and receiving and outputting a control instruction (including recipe data) transmitted from the display 2 or from another station via the display 2. The device 7 can be controlled.

Here, the display 2 is an indispensable device for the control system. However, in recent years, the display 2 has a storage capacity of, for example, about several megabytes and is sufficient for displaying a high-resolution image. Performs arithmetic processing at speed. Therefore, the display 2 can perform the above-described protocol conversion with a sufficient margin. In addition, P is placed between the display 2 and the personal computer 1.
Since the LC 3 is not interposed, the PLC 3 can concentrate on the control of the target system 2. Therefore, the storage capacity and the processing capacity can be reduced as compared with the above-described conventional control system in which the PLC processes most of the communication.

As an example of processing with a large amount of communication, when converting a product manufactured by the target system,
A process of downloading screen data from the personal computer 1 to the display 2 is exemplified. However, in the control system according to the present embodiment, since the screen data does not pass through the PLC 3, even when downloading the screen data, the PLC 3 can continue to operate normally with a small load.

Further, irrespective of the type of the PLC 3, communication is performed between each display 2 and the personal computer 1 by a common protocol. Therefore, a plurality of types of PLCs 3 can be mixed in the same control system, and the range of model selection can be widened. Further, unlike the above-mentioned conventional control system, the common network 4 of the present control system has a common communication protocol. Therefore, for example, devices connected to the common network 4 such as hubs, bridges, and routers can be freely diverted, and the degree of freedom regarding the arrangement of these devices and the PLC 3 can be improved. In addition, since a converter for mutually converting communication protocols is not required, the manufacturing cost of the entire control system can be reduced.

In the control system in which the communication protocol is shared in the common network 4 as described above,
Data can be easily distributed between the personal computer 1 and the PLC 3 via each display 2. Next, the distribution will be described in detail.

Here, each node A of the common network 4
To C, each display 2 is connected, and the PLCs 3 individually connected to the display 2 each have 100 input / output terminals. In such a configuration, the recipe data from the personal computer 1 is stored in the corresponding storage area of the memory in the PLC 3 for the output terminal of each PLC 3, and the output device 7 is controlled in response to the stored contents. . Further, for the input terminal of each PLC 3, the input device 6 is stored in the corresponding store area of the above-mentioned memory.
The input data from is written.

In the example shown in Table 1, 100 to 199, 200 to 299, and 200 to 299 are stored in the store areas corresponding to 100 input / output terminals of each PLC 3 corresponding to the nodes A to C.
Store addresses of 300 to 399 are assigned.

The data distribution unit 2g of the display unit 2 of the node A sends the address 10 to the preset time XX: XX.
The data in the storage area of 0 to 199, that is, all the input / output data is distributed, and the data is stored in the personal computer 1 and the display 2 of the node B. Similarly, from the display 2 of the node A, the addresses 100 to 14 are set every 10 seconds.
9, the data in the store areas 150 to 199 are distributed every 20 seconds, and the addresses 140 to 15 are stored when the display 2 is powered on.
Nine store areas are distributed.

[0078]

[Table 1]

When the output of the device connected to a certain terminal of the PLC 3 arranged in the last station rises at the end of all the processes, the data distribution unit 2g in the display 2 of the node C sends the recipe to the personal computer 1. Request data delivery. On the other hand, recipe data from the personal computer 1 is distributed to each PLC 3 via each display 2 of the nodes A to C, and stored in the storage areas of addresses 100 to 199, addresses 200 to 299, and addresses 300 to 299, respectively. You.

The personal computer 1 stores all data (output data of the PLC 3) distributed from each display device 2. On the other hand, the indicator 2 corresponding to the PLC 3 provided at the most upstream side of the production line for the node A is
It does not take in the distribution data from the display 2 corresponding to each PLC 3 for the downstream nodes B and C. However, the display 2 (B / C) takes in all the distribution data from the display 2 (A / B) on the upstream side of the manufacturing line, and the display 2 (C) takes the display 2 (C). Part of the data from (A) is also captured. Each display 2 has a storage area required for storing distribution data in the data distribution unit 2g.

The data may be fetched by the personal computer 1 and each display 2 by storing the address of the destination in the distribution data from the distribution source, for example, in the IP address. Also, when there are many receiving destinations, the above data capturing is performed by using the above IP address as a broadcast, and determining whether or not to capture the data in response to the distribution source IP address of the distribution data on the receiving side. May be determined.

Further, like the personal computer 1, all the display units 2 have store areas corresponding to all the distribution data, and may naturally hold all the distribution data. Further, in the example shown in Table 1, for simplicity of description, the store address of the transmission data and the store address of the reception data match each other, but they do not always need to match, and are different from each other. You may.

As described above, when the distribution condition is satisfied, not only can the data be distributed between each display 2 and the personal computer 1, but also when the establishment of the distribution condition is triggered, the application unit 1 f of the personal computer 1 preliminarily sets the data. The specified application can be started as described above. Subsequently, the activation will be described in detail.

For example, distribution conditions of “rising trigger” are set, and error information of the device is stored in a store area corresponding to each device in the memory of the PLC 3.
If bits indicating various information such as work instruction information corresponding to the device output are provided, when this bit rises, the distribution conditions and the node information (station name) of the PLC 3 to which the device is connected are displayed. It is transmitted from the display 2 of the node. In the personal computer 1, upon receiving such information, the data communication processing unit 1a activates the application specified on the screen of FIG. At this time, the data communication processing unit 1a triggers an OS (operating system) (not shown) using the above information as a trigger.
To start the application. by this,
The specified application starts.

For example, when the word processor software is started, a specified file is opened, and a message notifying the occurrence of a device abnormality or a message relating to a work instruction created in the file is displayed on the display of the personal computer 1. When the voice reproducing software is started, a file in which the above message is recorded as voice is opened, and the message is reproduced. This allows the operator to take necessary actions according to the message. When the communication software starts, the specified phone number is dialed,
The above message is sent to a pager, mobile phone, or the like. With this, even if you are not near the PC 1,
You can receive the above message.

Alternatively, when the database software is started, the recipe data set in the database software can be distributed to the PLC 3 using the data distribution function of each display 2. When the spreadsheet software is started, the output data from the PLC 3 can be collected by the spreadsheet software in the personal computer 1 by using the data distribution function of each display 2.

In the above example, the application is started with the rising trigger as a trigger (distribution condition). However, other distribution conditions may be used as the distribution condition for starting the application. . For example, if the distribution condition is the screen shown in FIG.
For example, the application may be activated by turning on the power or at a specified time as a trigger.

As described above, in the control system of the present embodiment, the display 2 absorbs the difference in the communication protocol for each PLC 3 model, and facilitates data communication between each display 2 and the personal computer 1. ing. Therefore, the application specified by the personal computer 1 can be started at the timing when the specified distribution condition is satisfied. therefore,
Like the conventional software for accessing the PLC from the host computer, the PLC
In addition, there is no need to always inquire about the operation state of the PLC,
The application can be started efficiently.
Further, since the data communication processing unit 1a has an application starting function, there is no need for the user to create a program for starting an arbitrary application according to the operation state of the PLC as in the related art.

If the distribution function of the display unit 2 of the control system is used, the transfer of data (output data and recipe data) between the application started automatically as described above and the PLC 3 is performed by the PLC 3. It can be easily performed regardless of the model.

In the present embodiment, TCP / IP over Ethernet is adopted as the common network 4, but the present invention is not limited to this. For example, IEEE1
Other networks such as 394 may be used. Similar effects can be obtained if the network has a sufficient communication capacity for the personal computer 1 to communicate with each PLC 3 via the display 2.

In this embodiment, the common network
Data string DT transmitted to work 4 _TwoIs shown in Figure 3.
Thus, the data body 12 including the contents of the instruction to the PLC 3,
And a header section 11 to which the PLC 3 is connected.
However, it is not limited to this. For example, one PC
One display 2 is connected,
Personal computer 1 communicates with each display 2
For example, when the port for the
If the communication partner can be specified without including the
T_TwoDoes not include the header section 11, the same effect can be obtained.
It is.

[0092] In this case, as the common network 4, a network such as RS-232C which does not need to include a header portion in the transmission protocol is adopted. However, in this case, the number of the display units 2 that can be connected to the personal computer 1 is limited by the number of ports of the personal computer 1 and the like. Therefore, if necessary the degree of freedom in the network configuration common network 4, as in the present embodiment, the header portion 11 included in the data string DT _2, who identifies the communication partner is desired.

[0093]

As described above, in the application software activation system according to the present invention, while the host computer and the plurality of display-type control devices communicate using a common communication protocol via a common network, the above-mentioned display is performed. The type control device and the control device to which the input device and the output device are connected perform communication using a communication protocol specific to the control device via a dedicated network, and the display type control device performs communication used in the two networks. Protocol conversion means for mutually converting a protocol into a communication protocol used in the two networks, and notifying means for notifying the host computer of information on a preset condition when the condition is satisfied. The host computer sends information on the condition from the notifying means. Upon receiving the a configuration that has a starting means for starting a pre-specified application software.

Thus, the communication protocol used in the common network between the display control device and the host computer and the communication protocol used in the dedicated network between the display control device and the control device are mutually reciprocal. Is converted. Therefore, the display control device always uses the same communication protocol regardless of the communication protocol of the control device.
It can communicate with a host computer via a common network. As a result, the host computer can obtain information on the control devices having different communication protocols via the display control device.

Further, since the application software in the host computer is started when a preset condition is satisfied, for example, it is not necessary for the host computer to inquire of the control device about the operation state, and the host computer does not need to inquire about the operation state. Communication load is reduced. Since communication is possible regardless of the communication protocol, data can be easily exchanged between the started application software and the control device.

Therefore, in a control system provided with a control device having a different communication protocol for each model, the host computer can start desired application software based on the operation state of the control device.

The application software starting method according to the present invention allows a host computer and a plurality of display control devices to perform communication using a common communication protocol via a common network, while the display control device operates. Communication between the input device and the control device to which the output device is connected via a dedicated network using a communication protocol specific to the control device, and in the display control device, the communication used in the two networks The protocol is mutually converted into a communication protocol used in both networks, and when a preset condition is satisfied, information about the condition is notified to the host computer. Information, the application specified in advance It is a method to start the ® down software.

Thus, the communication protocol used in one network is converted into the communication protocol used in the transmission destination network in the display control device. Therefore, the display-type control device can always communicate with the host computer through the common network using the same communication protocol, and as a result, the host computer can display information about the control device having a different communication protocol from the display-type control device. Can be obtained via

When a preset condition is satisfied, the host computer starts application software specified in advance. This eliminates the need for the host computer to constantly monitor the operation state of the control device, and can automatically start the application software if the above condition is satisfied. Further, data can be easily exchanged between the activated application software and a control device having a different communication protocol.

Therefore, similar to the above-described activation system,
In a control system provided with a control device having a different communication protocol for each model, there is an effect that the host computer can start desired application software based on the operation state of the control device.

A recording medium on which a program for activating application software according to the present invention is recorded
A control device connected to an input device and an output device, and a display type control device that displays a control state of the control device and gives a control instruction to the control device, via a dedicated network. A communication is performed using a communication protocol, and in the display-type control device, the communication protocol used in the two networks is mutually converted into the communication protocol used in the two networks, and a preset condition is satisfied. When the information about the condition is notified to the host computer, and the host computer receives the information about the condition, the host computer uses a recording medium on which a program for starting application software specified in advance is recorded. is there.

As a result, the communication protocol used in one network is converted into the communication protocol used in the transmission destination network in the display control device. Therefore, the communication between the display control device and the host computer can always be performed using the same communication protocol. As a result, the host computer can display the information on the control device having a different communication protocol from the display control device. You can get through.

When the preset conditions are satisfied, the host computer starts the application software specified in advance, so that the host computer does not need to constantly monitor the operation state of the control device. If the condition is satisfied, the application software can be automatically started. Further, data can be easily exchanged between the activated application software and a control device having a different communication protocol.

Moreover, since the above-mentioned program is provided in combination with a process for protocol conversion and distribution, dedicated software (program) for starting application software conventionally used is provided.
Do not need.

Therefore, similar to the above-mentioned activation system,
In a control system including a control device having a different communication protocol for each model, the host computer can start desired application software based on the operation state of the control device, and the program can be effectively used. It also has the effect of being able to do so.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a main part of a control system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a communication protocol of a dedicated network and a data transfer format referred to when a programmable display in the control system converts the communication protocol.

FIG. 3 is an explanatory diagram showing a communication protocol of a common network.

FIG. 4 is an explanatory diagram showing a command conversion table referred to when the programmable display device converts a communication protocol.

FIG. 5 is an explanatory diagram showing a setting screen including various setting items relating to application software to be activated among various application software installed in the application unit.

FIGS. 6A and 6B are explanatory diagrams showing a distribution condition setting screen and a distribution station / reception station setting screen set by a distribution setting unit in the personal computer, respectively.

FIG. 7 is a block diagram showing a configuration of a main part of a conventional control system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Personal computer (host computer) 1a Data communication processing part (starting means) 1c Data distribution setting part (communication means) 1f Application part (application software) 2 Programmable display (display type control device) 2a Data processing part 2f Conversion data storage Unit 2g data distribution unit 3 PLC (control device) 4 common network 5 dedicated network 6 input device 7 output device

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 21, 2000 (2008.2
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: APPLICATION SOFTWARE START-UP SYSTEM AND START-UP METHOD, AND RECORDING MEDIUM CONTAINING PROGRAM FOR START-UP THEREOF

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and method for activating various application software in association with the operation of an industrial control device such as a programmable logic controller, and a recording medium on which a program for activating the application is recorded. It is about.

[0002]

2. Description of the Related Art An industrial control device called a programmable logic controller (hereinafter, referred to as a PLC) is used to implement various controls such as a sequence control, such as a belt conveyor type automatic assembling machine. It is widely used as a control device for controlling a target system. Further, in recent years, with the complexity of the target system, the introduction of a network control system in which a plurality of PLCs are connected to each other via a network line has been spreading.

In such a network control system, display of the operation status of each PLC and control instructions to the PLC are performed by a display device having a control function such as a programmable display disposed near the PLC. Further, in the above control system, even in a place away from the PLC and the display device, the operation status of the PLC can be monitored and the PLC can be monitored.
The host computer installed in such a place can also participate so that the above-mentioned control can be performed.

In the above control system, for example, as shown in FIG. 7, PLCs 101... Are positioned at the center of control, and each PLC 101 has input / output devices such as sensors and actuators arranged at various parts of a target system. A device 102 is connected to a display device 103 such as a programmable display device for performing display and control instructions.
Further, another PLC 101 or host computer 104 is directly connected to the PLC 101 via a predetermined interface circuit or indirectly via a dedicated adapter. Data transfer between the PLC 101 and the host computer 104 and between the PLCs 101 is performed using the communication function of the PLC 101.

In such a control system, in the operation of the system, the operation state of the PLC 101 is monitored, and if necessary, the host computer 104 which performs centralized control of the control system gives a work instruction or an abnormality occurrence to an administrator. May inform. For this reason, conventionally, for example, using software that can access the PLC 101 from the host computer 104, the operating state of the PLC 101 is constantly monitored, and if an abnormality or the like is confirmed, application software (for example, (Eg, word processor software that creates characters and sentences).

[0006]

Generally, the PLC 101 often uses different communication protocols for data communication for each model (for each manufacturer or even for the same manufacturer even for each product). Therefore, in the above control system,
P is used both between each PLC 101 and the host computer 104 and between the PLC 101 and the display device 103.
It is necessary to communicate using a communication protocol specific to the LC 101. As a result, a problem arises in that it is not easy to use different types of PLCs 101.

More specifically, since it is necessary to prepare a communication protocol for communicating with the PLC 101 in both the host computer 104 and the display device 103, it is necessary to manufacture and maintain the host computer 104 and the display device 103. It takes time and effort.

When the degree of difference between the communication protocols is small, the communication protocols necessary for establishing communication, such as a start character, a stop character, and a method for designating a transmission / reception address, are the same and are not so important. If only the command is different, the PLC 10
If a different command is not used by limiting the function actually used among the functions of the PLC 1, the PLC 1 of a different model is used.
It is not impossible to use 01 in combination. However, when an important command such as a command for communicating with a plurality of models is different, the host computer 104 and the PLC
Even if communication is established with the host 101, the host computer 104 cannot instruct the PLC 101 to perform a desired operation.

In addition, when the communication protocol itself required for establishing the communication is different, not only communication between the PLC 101 having different communication protocols and the host computer 104 is not established, but also the PLC 101 having the same communication protocol. Communication with the host computer 104 is hindered. Therefore, the PLC 101
Is required, a converter must be inserted into the network, and the communication protocol must be mutually converted so that the PLC 101 can be seen by the host computer 104 and other PLCs 101 as the same model. However, in the control system as described above, in general, not only the place where the converter can be installed is often limited, but also the cost of the entire control system increases with the addition of the converter. Further, since there are a large number of communication protocols of the PLC 101, for example, 100 types or more, a desired converter corresponding to those communication protocols does not always exist.

Therefore, in a control system in which the PLC 101 is arranged at the center of communication, it is difficult to use different types of PLC 101 together, and the choices when selecting the PLC 101 are limited. For this reason, conventionally, in a control system, the PLC 101 of the same model is often used.

Further, since the PLCs 101, which are positioned at the center of control, process most of the communication in the control system, the load on the PLCs 101 increases. More specifically, the PLC 101 has been developed from a sequencer using a relay, and has been used for I / O control such as on / off control of a switch and data acquisition from a sensor.
Since it is good at processing related to O-control, the ability to process communication of the control system as described above is often insufficient, and even if the ability is not insufficient, the burden is large. For example, if only the target system is to be controlled, the PLC 101 usually requires a storage capacity of about several tens of kilobytes and a processing capacity according to the storage capacity. It is difficult to process this communication at a sufficient speed.

As described above, in the conventional control system, the host computer 1 is
There is a problem that the control data cannot easily be transferred from the PLC 04 to the different types of PLC 101. Also,
In the above control system, it is necessary for the user to create a program for activating any application software in accordance with the operation state of the PLCs 101... In addition, even if the above-described software capable of accessing the PLC 101 from the host computer 104 is used, the host computer 104 on which the software is installed may be used.
In addition, it is necessary to always inquire about the operation state of the PLC 101, and the efficiency of data communication is not so good.

The present invention has been made in view of the above-described problems, and does not require the creation of a new program by dedicated software or a user, and allows an arbitrary PLC to be operated in accordance with the operation state of a different type of PLC. It is an object of the present invention to provide a start-up system and a start-up method for application software capable of starting application software, and a recording medium on which a program for starting the application software is recorded.

[0014]

Application software activation system according to the present invention, in order to solve the problems] To solve the above problems, a controller input device and the output device is connected, it is connected to the control device, the control display control status of the device, and a display-type control device for providing a control instruction to the control unit, is provided on top of the plurality of the display type control device, the information about different control devices of the communication protocol
A host computer obtained through a display control device.
The display-type control device and the control device include a control device.
Dedicated network that communicates with the above-mentioned communication protocol specific to each device.
Connected individually via a network, while the host
The computer and the display-type control device share a common communication
Over a common network that communicates over
The display-type control device is connected to the control device
When relaying communication between the host computer
And protocol conversion means for converting a communication protocol used in the both networks to have each other <br/>, when preset condition is met, notifying means for notifying the information about the conditions in the host computer Wherein the host computer receives the information on the condition from the notifying means, and has a starting means for starting predetermined application software.

In the above arrangement, the protocol conversion means converts the communication protocol of the common network into the communication protocol of the dedicated network, while converting the communication protocol of the dedicated network into the communication protocol of the common network. Accordingly, the display-type control device can always communicate with the host computer via the common network using the same communication protocol regardless of the communication protocol of the control device. As a result, even if control devices having different communication protocols coexist in the control system including the control device, the display control device, and the host computer, the host computer obtains information on the control device via the display control device. be able to.

Further, when a predetermined condition (such as occurrence of an abnormality in the control device transmitted from the control device) is satisfied, the information about the condition is notified to the host computer by the notification means. In the host computer, the activation means activates application software specified in advance. Thus, for example, when the application software is started in accordance with the operation state of the control device, the host computer does not need to inquire the control device about the operation state, and the application software is automatically started when the above condition is satisfied. can do. Since communication is possible regardless of the communication protocol, data can be easily exchanged between the started application software and the control device.

The above application software start system
The stem, more specifically, the protocol conversion means,
Communication between the control device and the other display-type control device.
When relaying, the communication protocol used in both networks
Convert tocols to each other. Alternatively, the application
More details on the software activation system
Is a protocol conversion process by the above protocol conversion means.
The protocol information required for
The control device used is connected to the display control device.
Is switched .

[0018] Application software activation method according to the present invention, a control device for an input device and the output device is connected, is connected to the control device, to display the control state of the control device, and the control instruction to the control unit And a plurality of display-type control devices provided above the plurality of display-type control devices , and information on control devices having different communication protocols.
A host computer obtained through a display control device.
The display-type control device and the control device
Dedicated network that communicates with the above-mentioned communication protocol specific to each device.
Connected individually via a network, while the host
The computer and the display-type control device share a common communication
Over a common network that communicates over
Using the connected control system, in the display-type control device, the control device and the host computer
When relaying the communication, converts the communication protocol used in the both networks to each other physician, when preset condition is satisfied, and notifies the information about the conditions in the host computer, the When the host computer receives the information on the above conditions, the host computer starts up application software specified in advance.

Also in this starting method, in the display control device, the communication protocol between the host computer and the display control device is mutually converted with the communication protocol between the display control device and the control device. Accordingly, the display-type control device can always communicate with the host computer via the common network using the same communication protocol. Therefore, the host computer can obtain information on the control devices having different communication protocols through the display control device.

Further, when information about the preset condition is satisfied and the host computer is notified of the condition, application software specified in advance is started in the host computer. This eliminates the need for the host computer to constantly monitor the operation state of the control device, and can automatically start the application software if the above condition is satisfied. Further, data can be easily exchanged between the activated application software and a control device having a different communication protocol.

Starting the above application software
The law, more particularly, the control device and the other display-type controls
When relaying communication with the control device,
To convert the communication protocols used in each other. There
Is the same as the above
More specifically, the protocol required for protocol conversion processing
The above-mentioned control using different communication protocols
Switch when the device is connected to the display control device.

[0022] recording medium having a program recorded thereon for application software activated according to the present invention, in order to solve the above problems, a controller input device and the output device is connected, is connected to the control device , displays the control state of the control device, and a display-type control device for providing a control instruction to the control unit, is provided on top of the upper Symbol display type control device, different the control unit of the communication protocol leek
Host computer that obtains the information of the
Display type control using a control system with a computer
In the device, a common communication protocol is
The above host computer and other
While communicating with the display control device, a dedicated network
Control using a communication protocol specific to the control device
Communicates with control device, in the display-type control apparatus, the upper
Communication between the controller and the host computer.
When splicing, converts the communication protocol used in the both networks to each other physician, when preset condition is satisfied, the information about the condition and notifies the host computer, in said host computer A feature is that a program for starting application software designated in advance when receiving information on the above conditions is recorded.

According to the program recorded on the recording medium, the display-type control device converts between the two communication protocols used in the common and dedicated networks, so that the communication between the display-type control device and the host computer is performed. Can always be performed using the same communication protocol. Therefore, the host computer can obtain information on the control devices having different communication protocols through the display control device.

Further, when a preset condition is satisfied, when information on the condition is notified to the host computer, the host computer starts application software specified in advance. This eliminates the need for the host computer to constantly monitor the operation state of the control device, and can automatically start the application software if the above condition is satisfied. Further, data can be easily exchanged between the activated application software and a control device having a different communication protocol.

More specifically, the recording medium is provided with
Relays communication between the device and the other display-type control device
Communication protocol used in both networks
Programs for converting each other are recorded. There
More specifically, the above-mentioned recording medium is more
Protocol information necessary for
The adopted control device is connected to the display type control device.
Then, a switching program is recorded .

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

The control system according to this embodiment is similar to the control system shown in FIG.
, A personal computer (hereinafter, referred to as a personal computer) 1, a plurality of programmable displays (hereinafter, referred to as a display) 2, and a plurality of PLCs 3.

The personal computer 1 and the display units 2 are connected to each other via a common network 4 capable of performing communication using a common communication protocol. On the other hand, the display 2 and the PLC 3 are individually connected via a dedicated network 5 capable of performing communication using a unique communication protocol for each PLC 3.

In the broadly defined communication protocol, codes indicating start characters and end characters, transmission / reception timing of each character, a method of specifying a transmission destination and a transmission source, and the like are unified in a network including a transmission source and a transmission destination. If the communication protocol cannot transmit data normally if it is not, the operation desired by one and the operation performed by the other, if the transmission source and the destination are not unified, such as a command system that each PLC 3 can understand, will match. There is a communication protocol that cannot be controlled normally without the communication protocol. Therefore, in the following description, a combination of the two is referred to as a communication protocol, and when the two need to be distinguished, the former is distinguished as a transmission protocol and the latter is distinguished as a command system.

Here, in the communication protocol specified by the manufacturer of each PLC 3, when data reading is instructed,
Generally, as shown in FIG. 2, a control code (ESC) indicating that the code to be transmitted next is a command, and a PLC
Command code (R
D), a read start address (X0001), a read size (5), and a control code (R
Data train DT ₁ comprising ET) and is transmitted. However,
Between the PLCs 3, not only the command system including the command code but also the arrangement order of the address and the size, the control code itself, or the expression method for expressing the address and the size (the bit width and the character for indicating the numerical value are indicated. Code types) are often different from each other.

Therefore, in this embodiment, the display 2
When performing data communication via the common network 4, regardless of the communication protocol transmitted over the dedicated network 5, the communication protocol ( Common protocol). Specifically, in the present embodiment, as the common network 4,
A local area network (LAN) such as Ethernet (trademark: Xerox Corporation) is used, and TCP / IP is used as a communication protocol in the common network 4.
Has been adopted.

For this reason, each display 2 and personal computer 1 connected to the common network 4 are assigned a unique IP address, and when communicating via the common network 4, as shown in FIG. In addition, TCP / I
Receive defined format data sequence DT ₂ in P. This data string DT ₂ includes a header section 11 including the IP addresses of the transmission source and the transmission destination, and a data body 12 indicating the communication contents.
And Thus, for example, even when a computer or the like used by a control system developer is connected via a telephone line from a location different from the control system operating company, a communication device capable of communicating by TCP / IP is used. If it exists, it is possible to freely participate in the common network 4 without obstructing data transmission between other communication devices.

Further, in the common protocol, a common code 13 indicating the content of the command is included in the data body 12r when transmitting a command instructing data reading to the PLC 3.
And the related information 14 accompanying the common code 13 includes a read start address 14a and a read size 14b. Further, the data body 12 w when instructing the data write includes the write start address 14 c and the write data 14 d as the related information 14.

The common code 13 is a command code (each PL) in the dedicated network 5 between commands which can be understood by each PLC 3 and which have the same contents.
Irrespective of the command code in C3). In addition, for example, the order in which the data in the related information 14 is transmitted, such as the read start address 14a and the read size 14b, and the expression method at the time of transmission are unified regardless of the communication protocol in the dedicated network 5. Accordingly, in the common protocol, the command to be executed can be uniquely specified regardless of the type of the PLC 3 connected to the display 2.

The PLC 3 as a control device includes a CPU / power supply module, an input unit, and an output unit. The CPU / power supply module includes a CPU unit including a CPU and a memory, and a power supply unit that supplies power to each unit of the PLC 3. In accordance with the control program, the CPU unit receives input devices (in the figure, I
/ D) 6 based on a signal input from the input device, and performs a calculation process of recipe data (control data) given to an output device (O / D in the figure) 7. The input unit and output unit are
A portion having an interface function connected to the input device 6 and the output device 7, respectively, and exchanges a digital signal or an analog signal input / output with these devices with the CPU unit. .

As the input device 6, devices such as sensors (temperature sensors, optical sensors, etc.) and switches (pushbutton switches, limit switches, pressure switches, etc.) are used. As the output device 7, an actuator, a relay, a solenoid valve, a display, or the like is used. These input devices 6 and output devices 7 are arranged in required parts of various target systems such as a production line.

The display 2 as a display-type control device has an RA
It has memories such as M, ROM, flash ROM, and VRAM, and an arithmetic processing unit such as a CPU, and controls the operation of each unit of the display 2 by these. The display 2 includes a data processing unit 2a, interface units (I / Fs in the figure) 2b and 2c, an input unit 2d, a display unit 2e, a converted data storage unit 2f, and a data distribution unit 2g.

The data processing section 2a performs various data processings to perform display control of a control screen, protocol conversion, and data distribution. This data processing unit 2a
Software that can be provided in the form of program media as package software,
Is downloaded to the display unit 2 from. Further, this software may be installed in the display 2 in advance at the time of shipment of the display 2 as necessary.

With respect to the control of the display of the control screen, the data processing unit 2a draws the control screen on the display unit 2e using a VRAM or the like based on the screen data created by the personal computer 1. In the control screen, an image in which the input device 6 and the output device 7 are designed is synthesized as a component on a background screen imitating the target system. In the control screen configured in this way, the components are
The operation status of the input device 6 and the output device 7 is visualized.

Here, the program medium is a recording medium which is configured to be separable from the personal computer 1 and the display 2, and is a tape system such as a magnetic tape or a cassette tape, a magnetic disk system such as a floppy disk or a hard disk, Optical disc system of optical disc such as CD-ROM, MO, MD, DVD, etc., card system such as IC card (including memory card), optical card, or mask RO
A medium that fixedly holds a program, including a semiconductor memory such as an M, EPROM, EEPROM, or flash ROM, may be used.

Further, since the control system of the present embodiment has a system configuration that can be connected to a communication network including the Internet, it is a medium that carries the program in a fluid manner so as to download the program from the communication network. Is also good. However, when the program is downloaded from the communication network as described above, the download program may be stored in the personal computer 1 in advance, or may be installed from another recording medium.

The protocol conversion process is performed on both networks 4
If the communication protocols in 5 are different from each other, this is a process of converting one communication protocol to the other communication protocol with reference to the data stored in the conversion data storage unit 2f. In the data distribution process, when a preset distribution condition is satisfied, output data taken from the input device 6 into the memory of the PCL 3 and output from the PLC 3 is distributed to the personal computer 1 or another display device 2, The recipe data set by the personal computer 1 is displayed on each PLC 3 via the display 2.
This is the process of delivering to

The interface unit 2b is connected to a common network 4 for performing communication between the personal computer 1 and another display device 2. By communication via the common network 4, recipe data from the personal computer 1 is transferred from each display 2 to the PLC 3, or one PLC
The output data from the display 3 is transferred from the display 2 to the personal computer 1 or another display 2. On the other hand, the interface unit 2c is connected to the dedicated network 5 for performing communication with the PLC 3. The above-described recipe data and output data are exchanged between the display 2 and the PLC 3 by the communication via the dedicated network 5.

The input section 2d is constituted by an input device such as a touch panel for inputting on the display screen of the display section 2e. For this reason, the display unit 2e is configured by a flat display element such as a liquid crystal panel or an EL panel.

The conversion data storage unit 2 f stores data necessary for protocol conversion process. This data may be in any format as long as the communication protocol can be converted between the dedicated network 5 and the common network 4. The converted data storage unit 2 f according to the present embodiment is transmitted over the dedicated network 5. Data transfer format FMT indicating the format of the data
• Stores a command conversion table TBL indicating the correspondence between command codes transmitted in 5.

[0046] Specifically, as shown in FIG. 2, the data transfer format FMT is in data string DT ₁ transmitted in the dedicated network 5, e.g., data content itself to read or write, the size of the data, read and write Is a skeleton-like data string in which a portion that changes according to the data content to be actually transmitted, such as an address, is undefined, and only the purpose is defined for the undefined portion. If the command area is undefined, the data transfer format FM extracted from the data string actually transmitted is used.
If T is common to a plurality of commands, the command area may be undefined, and a common data transfer format FMT may be used between these commands.

The command conversion table TBL includes
As shown in FIG. 4, the correspondence between the common code transmitted on the common network 4 and the command code transmitted on the dedicated network 5 is stored. Data processing unit 2a
Converts one code to the other code based on the command conversion table TBL (for example, TBLa and TBL).
Between BLb).

The data distribution unit 2g distributes recipe data set in the personal computer 1 and output data from the PLC 3 to a designated distribution destination when a preset distribution condition is satisfied. Further, the data distribution unit 2g notifies the personal computer 1 of the fact that the preset distribution condition is satisfied and the fulfilled distribution condition. For this reason, in the data distribution unit 2g, the node information on the distribution destination node and the setting information on the distribution are downloaded from the personal computer 1 and stored in advance. The setting of the distribution condition will be described later in detail.

Personal computer 1 as host computer
CPU, memory (R)
It has an external storage device (hard disk drive, MO drive, etc.), a display device, and an input device (keyboard, mouse, etc.). As shown in FIG. 1, the personal computer 1 includes a data communication processing unit 1a,
Interface unit (I / F in the figure) 1b, distribution setting unit 1c, network file 1d, data file 1e
And an application unit 1f .

The interface section 1b is connected to a common network 4 for performing communication with the display 2.

The data communication processing section 1a is a section for performing data communication processing with the display devices 2 via the common network 4 and for exchanging data with the application section 1f. This data communication processing unit 1a
In order to transfer screen data created in the personal computer 1 with drawing software (not shown) to the display 2 or to distribute recipe data set in the application 1f from the display 2 to the PLC 3, for example, A process of reading recipe data from 1f and taking output data from the PLC 3 into the application unit 1f and collecting the data is performed.

The data communication processing section 1a is software that can be provided in the form of program media as package software, and is installed in the personal computer 1 in advance. This program medium is also a recording medium that is configured to be separable from the personal computer 1 and the display 2, similarly to the above-described program medium.

Further, the data communication processing section 1a, when a predetermined distribution condition is satisfied as described later, transmits various application software (hereinafter, simply referred to as an application) installed in the application section 1f. A predetermined application is started (starting means). Therefore, the data communication processing unit 1
a provides a screen for specifying an application to be started, as described later.

As the application section 1f, for example, word processor software, voice reproduction software, communication software, spreadsheet software, and database software are installed. The word processor software is used to create a message for notifying information on the occurrence of an abnormality from the PLC 3 and a work instruction. Voice reproduction software is used to reproduce these messages by voice.
The communication software is used for automatically dialing a designated telephone number and transmitting the above message to a pager or a mobile phone. The spreadsheet software is used to record and save output data from the PLC 3, to perform statistical processing, or to perform graph processing. Database software is PLC
3 is used to set the recipe data to be given.

The application unit 1f is not limited to the above-mentioned various software, but may be any other application (commercially available application or user application) as long as it performs processing relating to the operation status of the PLC 3. In addition, the above various software,
It may be used for purposes other than the above.

As shown in FIG. 5, the screen provided by the data communication processing section 1a includes a “start application”,
Includes “startup option”, “current folder”, “automatic station name assignment”, and “write data assignment”.

The “starting application” is a column for designating an application to be started, and the name of the application is entered in this column. The application specified here must accompany the executable file. The “startup option” is a column for specifying a file to be executed by the application to be started, and a file name as a start switch is written in this column. In addition, EXCEL.e may be used as a start switch according to the application to be started.
xe (Microsoft Excel spreadsheet software
(Executable file of (registered trademark)) or the like can be set. The “current folder” is a column for entering the name of a folder in which the above file is stored.

"Automatic assignment of station name" means that the name of the station (display 2) that is the notification source is added as data to the notification information notified from the display 2 that the distribution condition is satisfied. Is a check box for selecting. “Add write data” is a check box for selecting to add, to the above-mentioned notification information, code data in which a distribution condition serving as a trigger for activating an application is coded for each event.

The distribution setting section 1c sets node information and distribution information. The node information includes a node in the common network 4 and a type of the display 2 connected to the node. The distribution information includes a symbol name of a device (input device 6 and output device 7) connected to each PLC 3, a data distribution timing for each display 2, a store address of data to be distributed, a store address of received data, and the like. Contains. These node information and distribution information are stored in the network file 1d and downloaded to the data distribution unit 2g of each display 2 as needed. The distribution setting unit 1c is software that can be provided in the form of program media as package software, and is installed in the personal computer 1 in advance. This program medium is also a recording medium that is configured to be separable from the personal computer 1 and the display 2, similarly to the above-described program medium.

The distribution information is set on a setting screen as shown in FIGS. 6A and 6B. The setting screen is provided with “distribution conditions” and “distribution stations / reception stations”.

The “delivery conditions” shown in FIG. 6A include power-on, time designation, cycle designation, rewrite trigger, ON period, OFF period, rising trigger, and falling trigger as conditions for determining the distribution timing. Is provided.

"Power on" is a condition for distribution when the power of the display 2 is turned on, and "Time designation" is a condition for distribution at a designated time. The “cycle specification” is a condition for performing distribution at each desired cycle, and the “rewrite trigger” is
This is a condition for performing distribution when output data is rewritten, that is, when output data changes. "ON period"
And the "OFF period" are conditions for continuously performing distribution in each of the ON period and the OFF period of the device, and the "rising trigger" and the "falling trigger" are output data (designated device output). This is a condition for performing distribution when each of the rising edge and the falling edge is detected.

In the lower area of the distribution condition setting screen, there is provided a column for inputting a symbol name of a device to be designated with respect to a condition based on a device output among the above conditions. Further below, there are provided a cycle (in units of ms) for checking distribution conditions, a setting column for a distribution period, and a setting column for a process of returning a device output to OFF or ON after distribution. . However,
The check cycle is valid only for the distribution conditions of “power on”, “time setting”, and “cycle specification”, and the period limitation is valid only for the distribution condition of “cycle specification”. Also,
For the setting to return the device output to OFF after distribution,
This is valid only for the “trigger trigger” distribution condition. If this box is not checked, the device output will remain
N remains. On the other hand, device output is turned on after distribution
Is valid only for the distribution condition of “falling trigger”. If this column is not checked, the device output remains OFF after distribution.

On the other hand, the “distribution station / reception station” shown in FIG. 6B is provided with an information entry section for the distribution station and the reception station. The information of the distribution station includes a device name (here, the file name described above) as an output source of the recipe data distributed from the personal computer 1, a symbol name of the device as an output source of the output data distributed from the display 2, and And the number of data to be delivered in the specified period. Also,
The information of the receiving station is stored in the PL corresponding to the display 2 serving as the receiving station.
Contains the symbol name of the device connected to C3.
However, when the personal computer 1 is the receiving station, the name given to the file created by the application unit 1f is used as the symbol name.

In the data file 1e, the above-mentioned protocol conversion data to be stored in the conversion data storage unit 2f is registered in advance. The converted data is downloaded to the required display 2 via the data communication processing unit 1a at the time of initial setting or at the time of maintenance such as when the PLC 3 connected to the control system is changed.

In the control system configured as described above, when the data sequence DT ₂ of the common protocol is received via the common network 4, the data processing unit 2 a
Extracts a common code 13 indicating a command to be transmitted to the PLC 3 and related information 14 from the data body 12.
Further, the data processing unit 2a outputs the command conversion table T
With reference to the BL, a command code that can be transmitted in the dedicated network 5 and corresponds to the common code 13 is selected. If necessary, the expression method of the related information 14 is converted to an expression method transmitted on the dedicated network 5. As a result, commands to be transmitted to the PLC 3
When the data content itself, the data size, the address, and the like are determined, the data processing unit 2a can generate a data sequence to be sent to the PLC 3 with reference to the data transfer format FMT.

On the other hand, when the data sequence DT ₁ is received from the PLC 3, the data processing unit 2 a applies the command indicated by the data sequence, the data content itself, the data size and the address to the data transfer format FMT. extracted, converted into the data string DT ₂ common protocol in the reverse order to the above.

The combination (protocol information) of the data transfer format FMT and the command conversion table TBL is set in accordance with the communication protocol of the PLC 3 before the display 2 and the PLC 3 communicate control-related data. PLC adopting
When 3 is connected, its protocol information is switched. For example, in FIG. 4, when the PLC 3 of the model A is changed to the PLC 3 of the model B, the command conversion table TBL
Switching from a to the command conversion table TBLb.

The communication protocol may be selected, for example, by the user operating the personal computer 1 or the display 2. Further, the display 2 sends a command capable of specifying the communication protocol of the PLC 3 to the PLC 3 while sequentially selecting communication protocols that the display 2 itself can send, and the PLC 3
The communication protocol may be automatically determined based on the response code from. The display 2 may store the above protocol information for all communication protocols adopted by the PLC 3 that can be connected to itself.
Only the communication protocol of the currently connected PLC 3 may be stored, and the communication protocol may be downloaded from the personal computer 1 or via a recording medium by various methods as necessary.

As described above, by generating the data string DT ₁ to be transferred to and from the PLC 3 in real time during the operation of the control system, the display 2 can display the input data without asking where the input data came from. , PLC3, and can respond immediately without stopping the control system even if the PLC3 is changed.

As described above, in the present control system, unlike the conventional control system, the indicators 2 are arranged at the center of communication, and the indicators 2 are connected to the common network 4 and the dedicated network 5. Connected to both sides. Further, when the communication protocols in the two networks 4 and 5 are different, the display 2 converts the respective communication protocols to each other, and connects between the PLC 3 connected to itself and the personal computer 1 or another display 2. Relay communications. Thereby, even if the communication protocols adopted by the PLCs 3 connected to the respective display units 2 are different from each other, communication can be performed between each display unit 2 and the personal computer 1 by using a common communication protocol.

More specifically, the target system includes an input device 6 such as a flow sensor, a temperature sensor, or a sensor for detecting the state of each part of the target system, and an output device such as a valve or a motor that operates according to an instruction. The input / output devices 6 and 7 are controlled by the PLC 3. In addition, PLC3 has a unique communication protocol for each model of PLC3, for example, for each manufacturer or each product type, due to the history of development from a sequencer. Therefore, the PLC 3 connected to the display 2 via the dedicated network 5 communicates with the display 2 using a communicable communication protocol.

As a result, the PLC 3 is connected to the display 2 or through the display 2 to another display 2 or the personal computer 1.
While transmitting the data acquired by the input device 6 as output data of the PLC 3, and receiving and outputting a control instruction (including recipe data) transmitted from the display 2 or from another station via the display 2. The device 7 can be controlled.

Here, the display 2 is an indispensable device for the control system. In recent years, the display 2 has a storage capacity of several Mbytes, for example, in order to display a high-resolution image, and is sufficient for display. Performs arithmetic processing at speed. Therefore, the display 2 can perform the above-described protocol conversion with a sufficient margin. In addition, P is placed between the display 2 and the personal computer 1.
Since the LC 3 is not interposed, the PLC 3 can concentrate on the control of the target system 2. Therefore, the storage capacity and the processing capacity can be reduced as compared with the above-described conventional control system in which the PLC processes most of the communication.

As an example of the processing with a large communication amount, when converting a product manufactured by the target system,
A process of downloading screen data from the personal computer 1 to the display 2 is exemplified. However, in the control system according to the present embodiment, since the screen data does not pass through the PLC 3, even when downloading the screen data, the PLC 3 can continue to operate normally with a small load.

Further, irrespective of the type of the PLC 3, communication is performed between each display 2 and the personal computer 1 by a common protocol. Therefore, a plurality of types of PLCs 3 can be mixed in the same control system, and the range of model selection can be widened. Further, unlike the above-mentioned conventional control system, the common network 4 of the present control system has a common communication protocol. Therefore, for example, devices connected to the common network 4 such as hubs, bridges, and routers can be freely diverted, and the degree of freedom regarding the arrangement of these devices and the PLC 3 can be improved. In addition, since a converter for mutually converting communication protocols is not required, the manufacturing cost of the entire control system can be reduced.

In the control system in which the communication protocol is shared by the common network 4 as described above,
Data can be easily distributed between the personal computer 1 and the PLC 3 via each display 2. Next, the distribution will be described in detail.

Here, each node A of the common network 4
To C, each display 2 is connected, and the PLCs 3 individually connected to the display 2 each have 100 input / output terminals. In such a configuration, the recipe data from the personal computer 1 is stored in the corresponding storage area of the memory in the PLC 3 for the output terminal of each PLC 3, and the output device 7 is controlled in response to the stored contents. . Further, for the input terminal of each PLC 3, the input device 6 is stored in the corresponding store area of the above-mentioned memory.
The input data from is written.

In the example shown in Table 1, 100 to 199, 200 to 299, and 200 to 299 are stored in the store areas corresponding to the 100 input / output terminals of each PLC 3 corresponding to the nodes A to C, respectively.
Store addresses of 300 to 399 are assigned.

The data distribution unit 2g of the display 2 of the node A sends the address 10 to the preset time XX:
The data in the storage area of 0 to 199, that is, all the input / output data is distributed, and the data is stored in the personal computer 1 and the display 2 of the node B. Similarly, from the display 2 of the node A, the addresses 100 to 14 are set every 10 seconds.
9, the data in the store areas 150 to 199 are distributed every 20 seconds, and the addresses 140 to 15 are stored when the display 2 is powered on.
Nine store areas are distributed.

[0081]

[Table 1]

When the output of the device connected to a certain terminal of the PLC 3 arranged at the last station rises at the end of all the processes, the data distribution unit 2g of the display 2 of the node C sends the recipe to the personal computer 1. Request data delivery. On the other hand, recipe data from the personal computer 1 is distributed to each PLC 3 via each display 2 of the nodes A to C, and stored in the storage areas of addresses 100 to 199, addresses 200 to 299, and addresses 300 to 299, respectively. You.

The personal computer 1 stores all data (output data of the PLC 3) distributed from each display 2. On the other hand, the indicator 2 corresponding to the PLC 3 provided at the most upstream side of the production line for the node A is
It does not take in the distribution data from the display 2 corresponding to each PLC 3 for the downstream nodes B and C. However, the display 2 (B / C) takes in all the distribution data from the display 2 (A / B) on the upstream side of the manufacturing line, and the display 2 (C) takes the display 2 (C). Part of the data from (A) is also captured. Each display 2 has a storage area required for storing distribution data in the data distribution unit 2g.

The data capture by the personal computer 1 and each display 2 may be performed by storing the address of the destination in the distribution data from the distribution source, for example, in the IP address. Also, when there are many receiving destinations, the above data capturing is performed by using the above IP address as a broadcast, and determining whether or not to capture the data in response to the distribution source IP address of the distribution data on the receiving side. May be determined.

Further, like the personal computer 1, all the display units 2 have a store area corresponding to all the distribution data, and may naturally hold all the distribution data. Further, in the example shown in Table 1, for simplicity of description, the store address of the transmission data and the store address of the reception data match each other, but they do not always need to match, and are different from each other. You may.

As described above, when the distribution condition is satisfied, not only can the data be distributed between each display 2 and the personal computer 1, but also when the establishment of the distribution condition is triggered, the application unit 1 f of the personal computer 1 preliminarily sets the data. The specified application can be started as described above. Subsequently, the activation will be described in detail.

For example, distribution conditions of “rising trigger” are set, and error information of the device is stored in a store area corresponding to each device in the memory of the PLC 3.
If bits indicating various information such as work instruction information corresponding to the device output are provided, when this bit rises, the distribution conditions and the node information (station name) of the PLC 3 to which the device is connected are displayed. It is transmitted from the display 2 of the node. In the personal computer 1, upon receiving such information, the data communication processing unit 1a activates the application specified on the screen of FIG. At this time, the data communication processing unit 1a triggers an OS (operating system) (not shown) using the above information as a trigger.
To start the application. by this,
The specified application starts.

For example, when the word processor software is started, a specified file is opened, and a message notifying the occurrence of a device abnormality or a message relating to a work instruction created in this file is displayed on the display of the personal computer 1. When the voice reproducing software is started, a file in which the above message is recorded as voice is opened, and the message is reproduced. This allows the operator to take necessary actions according to the message. When the communication software starts, the specified phone number is dialed,
The above message is sent to a pager, mobile phone, or the like. With this, even if you are not near the PC 1,
You can receive the above message.

Alternatively, when the database software is started, the recipe data set in the database software can be distributed to the PLC 3 using the data distribution function of each display 2. When the spreadsheet software is started, the output data from the PLC 3 can be collected by the spreadsheet software in the personal computer 1 by using the data distribution function of each display 2.

In the above example, the application is started with the rising trigger as a trigger (distribution condition). However, other distribution conditions may be used as the distribution condition for starting the application. . For example, if the distribution condition is the screen shown in FIG.
For example, the application may be activated by turning on the power or at a specified time as a trigger.

As described above, in the control system according to the present embodiment, the display 2 absorbs the difference in the communication protocol for each model of the PLC 3 to facilitate the data communication between each display 2 and the personal computer 1. ing. Therefore, the application specified by the personal computer 1 can be started at the timing when the specified distribution condition is satisfied. therefore,
Like the conventional software for accessing the PLC from the host computer, the PLC
In addition, there is no need to always inquire about the operation state of the PLC,
The application can be started efficiently.
Further, since the data communication processing unit 1a has an application starting function, there is no need for the user to create a program for starting an arbitrary application according to the operation state of the PLC as in the related art.

If the distribution function of the display 2 of the control system is used, the transfer of data (output data and recipe data) between the application started automatically as described above and the PLC 3 is performed by the PLC 3. It can be easily performed regardless of the model.

In the present embodiment, TCP / IP over Ethernet is adopted as the common network 4, but the present invention is not limited to this. For example, IEEE1
Other networks such as 394 may be used. Similar effects can be obtained if the network has a sufficient communication capacity for the personal computer 1 to communicate with each PLC 3 via the display 2.

Further, in the present embodiment, the data sequence DT ₂ transmitted to the common network 4 includes, as shown in FIG.
It includes a header section 11 to which the PLC 3 is connected, but is not limited to this. For example, one PC
A configuration in which one display 2 is connected, and even when there are a plurality of displays 2, the personal computer 1 does not include the header unit 11 in a case where the personal computer 1 is individually provided with a port for communicating with each display 2. If the communication partner can also be specified, the data string D
Even T ₂ is not include the header portion 11, the same effect can be obtained.

In this case, a common network 4 such as RS-232C which does not need to include a header portion in a transmission protocol is employed. However, in this case, the number of the display units 2 that can be connected to the personal computer 1 is limited by the number of ports of the personal computer 1 and the like. Therefore, if necessary the degree of freedom in the network configuration common network 4, as in the present embodiment, the header portion 11 included in the data string DT _2, who identifies the communication partner is desired.

[0096]

As it is evident from the foregoing description, the application software activation system according to the present invention, a control device, 該制
A display-type control device connected to the control device, and a control device provided above the display-type control device and having a different communication protocol
Host computer that obtains information about the
A display control device and the control device.
The control device communicates with the above communication protocol unique to each control device.
Connected individually via a dedicated communication network
, The host computer and the display control device
Is a common network that communicates using a common communication protocol.
Are connected to each other via a network, and the display-type control device communicates between the control device and the host computer.
When relaying the signal, the communication protocol used in the two networks and protocol conversion means for converting each other physician, when the condition is met that is set in advance, and notifies the information about the conditions in the host computer Notification means, and the host computer, when receiving information on the condition from the notification means, has a start means for starting application software designated in advance.

Thus, the communication protocol used on the common network between the display control device and the host computer and the communication protocol used on the dedicated network between the display control device and the control device are mutually reciprocal. Is converted. Therefore, the display control device always uses the same communication protocol regardless of the communication protocol of the control device.
It can communicate with a host computer via a common network. As a result, the host computer can obtain information on the control devices having different communication protocols via the display control device.

Further, since the application software in the host computer is started when a preset condition is satisfied, for example, it is not necessary for the host computer to inquire of the control device about its operation state, and the host computer does not need to inquire about the operation state. Communication load is reduced. Since communication is possible regardless of the communication protocol, data can be easily exchanged between the started application software and the control device.

Therefore, in a control system provided with a control device having a different communication protocol for each model, the host computer can start desired application software based on the operation state of the control device.

The application software starting method according to the present invention comprises a control device and a table connected to the control device.
A display-type control device, provided above the display-type control device,
Display information on control devices with different communication protocols
A host computer obtained through the mold control device,
The display-type control device and the control device are provided for each control device.
Dedicated network that communicates with the above communication protocol specific to
Connected individually via the network, while the host
Computer and the display-type controller described above share a common communication protocol.
Connected to each other via a common network
In the display type control device using the system,
Communication between the control device and the host computer
When relaying converts the communication protocol used in the both networks to each other physician, when preset condition is satisfied, the information about the condition and notifies the host computer, in said host computer In this method, upon receiving information on the above conditions, the application software specified in advance is started.

As a result, the communication protocol used in one network is converted into the communication protocol used in the transmission destination network in the display control device. Therefore, the display-type control device can always communicate with the host computer through the common network using the same communication protocol, and as a result, the host computer can display information about the control device having a different communication protocol from the display-type control device. Can be obtained via

When a preset condition is satisfied, the host computer starts application software specified in advance. This eliminates the need for the host computer to constantly monitor the operation state of the control device, and can automatically start the application software if the above condition is satisfied. Further, data can be easily exchanged between the activated application software and a control device having a different communication protocol.

Therefore, similar to the above-mentioned activation system,
In a control system provided with a control device having a different communication protocol for each model, there is an effect that the host computer can start desired application software based on the operation state of the control device.

A recording medium on which a program for starting application software according to the present invention is recorded is :
Control device and display-type control device connected to the control device
And a communication protocol provided above the display control device.
The information on the control devices with different
And a host computer obtained through
The control device and the control device are unique to each control device.
Via a dedicated network that communicates with the communication protocol
While individually connected, the host computer and
The display control device communicates using a common communication protocol.
Systems connected to each other via a common network
The display-type control device, wherein the control device
When relaying communication between the host computer
Converts to have each other communication protocol used in the both networks <br/>, when preset condition is satisfied, the information about the condition and notifies the host computer, in said host computer ,
A recording medium on which a program for starting application software specified in advance upon receiving information on the above conditions is recorded.

Thus, the communication protocol used in one network is converted into the communication protocol used in the transmission destination network in the display control device. Therefore, the communication between the display control device and the host computer can always be performed using the same communication protocol. As a result, the host computer can display the information on the control device having a different communication protocol from the display control device. You can get through.

When the preset condition is satisfied, the host computer starts the application software specified in advance, so that the host computer does not need to constantly monitor the operation state of the control device. If the condition is satisfied, the application software can be automatically started. Further, data can be easily exchanged between the activated application software and a control device having a different communication protocol.

Moreover, since the above-described program is provided in combination with a process for protocol conversion and distribution, dedicated software (program) for starting application software conventionally used is provided.
Do not need.

Therefore, similar to the above-described activation system,
In a control system including a control device having a different communication protocol for each model, the host computer can start desired application software based on the operation state of the control device, and the program can be effectively used. It also has the effect of being able to do so.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a main part of a control system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a communication protocol of a dedicated network and a data transfer format referred to when a programmable display in the control system converts the communication protocol.

FIG. 3 is an explanatory diagram showing a communication protocol of a common network.

FIG. 4 is an explanatory diagram showing a command conversion table referred to when the programmable display device converts a communication protocol.

FIG. 5 is an explanatory diagram showing a setting screen including various setting items relating to application software to be activated among various application software installed in the application unit.

FIGS. 6A and 6B are explanatory diagrams showing a distribution condition setting screen and a distribution station / reception station setting screen set by a distribution setting unit in the personal computer, respectively.

FIG. 7 is a block diagram showing a configuration of a main part of a conventional control system.

[Description of Signs] 1 Personal computer (host computer) 1a Data communication processing unit (starting unit) 1c Data distribution setting unit ( notifying unit) 1f Application unit (application software) 2 Programmable display (display control device) 2a Data processing Unit 2f conversion data storage unit 2g data distribution unit (distribution means) 3 PLC (control device) 4 common network 5 dedicated network 6 input device 7 output device

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) HH34

Claims (3)

[Claims] 1. A control device to which an input device and an output device are connected, a display-type control device for displaying a control state of the control device and giving a control instruction to the control device, and a higher-level device of the display-type control device An application software activation system that activates application software in the host computer by communicating with the host computer provided in the host computer, wherein the host computer and a plurality of display control devices are shared via a common network. While performing communication using the communication protocol of the above, the display-type control device and the control device perform communication using a communication protocol specific to the control device via a dedicated network, and the display-type control device The communication protocol used in the network And protocol conversion means for converting each other in the communication protocol that,
A notification unit for notifying the host computer of information on the condition when a preset condition is satisfied, wherein the host computer receives the information on the condition from the notification unit. An application software activation system, characterized in that the application software activation system further comprises activation means for activating predetermined application software. 2. A control device to which an input device and an output device are connected, a display control device for displaying a control state of the control device and giving a control instruction to the control device, An application software method system for starting application software in the host computer by performing communication with a host computer provided in the host computer, wherein the host computer and the plurality of display control devices are connected via a common network. Communication between the display-type control device and the control device using a communication protocol specific to the control device via a dedicated network, while allowing the display-type control device and the control device to perform communication using the common communication protocol. In the control device, the communication protocol used in both networks is The protocol is mutually converted into a communication protocol used in a network, and when a preset condition is satisfied, information on the condition is notified to the host computer, and the host computer receives information on the condition. And a method for activating application software designated in advance. 3. A control device to which an input device and an output device are connected, and a display control device for displaying a control state of the control device and giving a control instruction to the control device via a dedicated network. A control device performs communication using a unique communication protocol, and uses a common communication protocol via a common network between a host computer provided above the display control device and a plurality of the display control devices. A program for activating the application software in the host computer by causing the host computer to perform communication, wherein the display-type control device uses a communication protocol used in the two networks in the two networks. Are converted to each other according to the specified communication protocol, and the Is satisfied, the information on the condition is notified to the host computer. When the information on the condition is received by the host computer, a program for activating the application software designated in advance is recorded. Computer readable recording medium.