JP5958517B2 - Equipment control system - Google Patents

Description

  The present invention is responsible for one or a plurality of equipment, one or a plurality of equipment controllers for controlling the operation of the equipment, and all or a part of the one or a plurality of the equipment controllers. As a device controller, one or more first layer programs for instructing a device operation command for the facility device to the device controller and managing the operation result of the facility device transmitted from the device controller And the equipment required for processing the work request according to a work request that is a request for work to be realized by operating the equipment and one or more first-layer computers To operate one or more first layer computers and to operate the first layer computers. And a single second-layer computer that executes a second-layer program for managing the result of the work related to the work request based on the operation result of the equipment and equipment transmitted from the computer. About the system.

  Such an equipment control system is, for example, an automatic warehouse equipped with a stacker crane that takes in and out articles between equipment storage shelves and itself as equipment equipment, a sorting cart that transports articles along a set track, and the above automatic warehouse. A loading / unloading conveyor for loading / unloading articles between the loading / unloading position of the stacker crane and a loading / unloading position of the sorting cart, and a loading / unloading conveyor for loading / unloading articles between the loading / unloading position of the sorting cart and the shipping position , Etc. are applied to a logistics facility configured.

  The equipment control system in such a physical distribution facility commands an equipment operation command for the equipment to the equipment controller that controls the operation of the equipment, and manages the operation results of the equipment transmitted from the equipment controller. A computer (first layer computer) that executes a program to be performed (first layer program), and a work command to the first layer computer, and the operation of the equipment transmitted from the first layer computer And a computer (second-layer computer) that executes a program (second-layer program) for managing the results.

  The second layer computer instructs the work command to the first layer computer in charge of the equipment that needs to be operated to process the work command according to the work request based on the loading / unloading schedule. Based on the work command, the first layer computer issues a device operation command for the equipment to the device controller that it is in charge of (see, for example, Patent Document 1).

  In the equipment control system for physical distribution equipment disclosed in Patent Document 1, a first-layer computer (automatic warehouse control device) is based on a work command from a second-layer computer (equipment controller) that manages the entire equipment. A device operation command is commanded to a device controller that individually controls the operation of each device. Then, the first layer computer is stored in the storage position and information on the storage position uniquely given to each of the plurality of article storage units of the article storage shelf based on the operation result information from the device controller. Each piece of article is associated with identification information unique to each piece of article, and is configured to manage article management information that is information for specifying the article stored in the article storage unit. This article management information is output to the second layer computer through the communication line, and the second layer computer associates these with the shelf data (inventory data) based on the storage position information and the identification information unique to the article. Is configured to manage inventory.

  Since the equipment control system for physical distribution equipment in Patent Document 1 is configured as described above, for example, an abnormality occurs in the second-layer computer, and thereafter, the data held before the abnormality occurs is initialized. Even when recovered in the same state, shelf data (inventory data) for inventory management can be reconstructed based on the article management information held by the first-layer computer, enabling quick recovery. is there.

  However, in such a configuration, although it is easy to recover the inventory data when an abnormality occurs in the second-layer computer and then recovers, there is no equipment controller until the recovery operation is completed. As a result, it has become unavoidable that the operation efficiency of the entire physical distribution facility is lowered, such as the necessity to manually give a work command to the first layer computer.

JP-A-9-136705

  In an information processing system using a computer, in order to avoid a problem that when a computer that executes a program that performs a certain process has an abnormality, the process that the program that is being executed by the computer cannot continue, A computer in operation (referred to as an operational computer) and a computer (referred to as a standby computer) for the purpose of only substituting the functions of the computer, and when an abnormality occurs in the operational computer, the operational system A non-disruptive system that performs failover without failing to stop the information processing system in a form in which the computer is failed over to the standby computer, and the processing of the program executed by the malfunctioning active computer is taken over by the standby computer. It has been realized. Such a non-stop system is called high availability clustering.

  When performing high availability clustering, an abnormality is detected by providing a mutual monitoring mechanism called HeartBeat between the active computer and the standby computer. However, in high-availability clustering, the operational computer operates normally because the mutual monitoring mechanism misunderstands that an abnormality has occurred in the operational computer due to an instantaneous network interruption between the active computer and the standby computer. However, the standby computer is automatically activated by the system, and so-called split brain syndrome may occur.

  In the equipment control system as shown in Patent Document 1, when high-availability clustering in which the second-layer computer is the active computer is introduced, the network interruption between the second-layer computer and the standby computer is second. When the above-described split brain syndrome occurs due to a misconception of a layer computer error, for example, there are two second layer computers that execute the same second layer program. There is a risk that a command is issued. Thus, when a plurality of work commands are commanded to the first layer computer, there is a possibility that the same transport request may be issued again even though the transport of the article is completed, and the entire equipment control system There was a risk of lowering the operating efficiency. For these reasons, the facility control system has been required to realize a non-stop system capable of accurately suppressing the occurrence of split brain syndrome and suppressing a decrease in processing efficiency of facility equipment. Further, in high availability clustering, it is necessary to provide a standby computer for the purpose of substituting the operational computer for the operational computer, resulting in high equipment costs.

  The present invention has been made in view of the above circumstances, and an object thereof is a computer that issues a work command in an equipment control system provided with a computer that commands a work command to a computer that controls the operation of the equipment. An object of the present invention is to provide an equipment control system that can suppress a decrease in processing efficiency of the equipment control system as a whole and can prevent an increase in equipment costs even when an abnormality occurs.

In order to achieve the above object, the first characteristic configuration of the equipment control system according to the present invention includes one or more equipment, one or more equipment controllers for controlling the operation of the equipment, and one or As a device controller that is in charge of all or a part of the plurality of device controllers, the device controller sends a device operation command for the facility device to the device controller and is transmitted from the device controller. Work that is a request for one or more first layer computers that execute one or more first layer programs for managing operation results, and work that is to be realized by operating the equipment. In accordance with the request, one or more of the first tier cores are operated to operate the equipment necessary to process the work request. A second layer program for instructing a work instruction to a computer and managing the result of the work related to the work request based on the operation result of the equipment transmitted from the first layer computer is executed. A single second tier computer that includes:
One or a plurality of the first layer computers, according to the work command, instruct one or a plurality of device controllers to be in charge of one or a plurality of device controllers in charge of the first layer computer. One or more of the first layer computers configured to execute a first layer program, the second layer program being executed by the second layer computer when an abnormality occurs in the second layer computer Selection means is provided for selecting whether or not to execute the operation by human operation,
An alternative command output means for instructing an alternative command for executing the second layer program executed by the second layer computer in which an abnormality has occurred as a replacement target program;
The alternative command output means is configured to output the alternative command according to the selection information selected by the selection means;
The first layer computer is configured to execute the substitution target program based on the substitution command output by the substitution command output means.

  That is, when an abnormality occurs in the second layer computer, whether or not to cause the first layer computer to execute the second layer program executed by the second layer computer is selected by a manual operation by the selection means, In accordance with the selection information, the first layer computer executes the second layer program that has been executed on the second layer computer in which an abnormality has occurred.

In other words, since the user selects by human operation, the user is in a state in which the second layer program executed on the second layer computer does not function due to an abnormality in the second layer computer. , The second layer program can be executed on the first layer computer. Accordingly, the second tier computer is not abnormal in the second tier computer, but for some reason (for example, due to an instantaneous interruption in the network between the second tier computer and the first tier computer). The system misidentifies that an abnormality has occurred in the layer computer, and the second layer program executed on the second layer computer is automatically executed on the first layer computer. It is possible to avoid a state where the same second layer program is executed on both sides.
As described above, when the second layer program is executed by both the second layer computer and the first layer computer, there is a possibility that the work command is instructed again after the work command is instructed to the first layer computer. There is. For this reason, the equipment operation command is instructed for the same work and the equipment operates even though the operation of the equipment required for processing the work related to the work instruction is completed. The operation efficiency of the entire equipment control system may be reduced. On the other hand, according to the first characteristic configuration, it is possible to avoid the situation where the second layer program is executed by both the second layer computer and the first layer computer. It is possible to prevent the work command from being duplicated from both the layer computer and the processing efficiency of the entire equipment control system from being lowered.

  Moreover, according to the first feature configuration, when an abnormality occurs in the second layer computer, the second layer program executed on the second layer computer is executed on the first layer computer, that is, an abnormality occurs. In addition, since it is possible to replace the second layer computer with the first layer computer used in the facility control system, it is necessary to separately provide a computer only for the purpose of replacing the second layer computer. No increase in equipment cost can be suppressed.

  In short, according to the first feature configuration, in the equipment control system provided with the computer that commands the work command to the computer that controls the operation of the equipment, when an abnormality occurs in the computer computer that commands the work command. In addition, it is possible to provide an equipment control system that can suppress a decrease in processing efficiency of the equipment control system as a whole and suppress an increase in equipment costs.

In the second feature configuration of the facility control system according to the present invention, in addition to the first feature configuration, two or more of the plurality of first layer computers are set as alternative candidate computers capable of executing the second layer program. And
The selection means is configured to be freely selectable by a human operation as to which of the replacement candidate computers is to execute the replacement target program.

  In other words, since the first layer computer that executes the second layer program can be selected from two or more first layer computers, the second layer program can be substituted with a sufficient processing capacity. An appropriate first layer computer can be selected to execute the second layer program, and a highly available equipment control system can be provided.

In addition to the second feature configuration, the third feature configuration of the equipment control system according to the present invention can execute both the first layer program and the second layer program at the same time as the first layer computer. A high-performance computer having a high processing capacity and a low-performance computer having a processing capacity capable of executing only the first layer program,
The high-capacity computer is set as the replacement candidate computer.

  That is, as the first layer computer, a high-capacity computer having a processing capability capable of executing both the first layer program and the second layer program at the same time, and a low capability having a processing capability capable of executing only the first layer program. When a capability computer is used, the second layer program can be selected by setting only the high capability computer among the high capability computer and the low capability computer as an alternative candidate computer and selecting it. It is possible to suppress execution by a low-capacity computer having processing capability capable of executing only the program, in other words, both the first layer program and the second layer program cannot be executed at the same time. A decrease in processing efficiency of the entire system can be suppressed.

A fourth characteristic configuration of the equipment control system according to the present invention is the work communicated between the first layer computer and the second layer computer in addition to any one of the first to third characteristic configurations. Buffer means for relaying the command data and the operation result data is provided,
The buffer means is configured to relay the transmission / reception of data between the first layer computer and the second layer computer based on the identification information in a form in which identification information is given to each of the first layer computer and the second layer computer.
The substitute command output means commands an identification information takeover command for causing the first layer computer to take over the identification information given to the second layer computer when an abnormality occurs in the second layer computer. It is in the point which is comprised.

  That is, the buffer means relays transmission / reception of data communicated between them based on identification information (for example, IP address and host name) assigned to the second layer computer and the first layer computer, respectively. The substitute command output means commands the identification information takeover command to pass the identification information given to the second layer computer in which an abnormality has occurred to the first layer computer before outputting the substitute command. Therefore, even when an abnormality occurs in the second-layer computer and the second-layer program executed on the second-layer computer is executed on the first-layer computer, the buffer means does not Data transmitted and received by the second-layer computer can be relayed to and from the first-layer computer that is the substitute destination.

  Therefore, even when an abnormality occurs in the second layer computer and the second layer program executed by the second layer computer is executed by the first layer computer, any second layer program or first layer program is Therefore, it is not necessary to change the identification information of the transmission destination of the command and report data managed by itself, and an equipment control system capable of simplifying the configuration can be provided.

In addition to any of the first to fourth feature configurations, the fifth feature configuration of the facility control system according to the present invention, the facility equipment is configured by an article transport device in a logistics facility,
The first layer computer is configured to manage the device controller that controls the operation of the article transporting device;
The second-layer computer is configured to manage conveyance information of articles in the entire logistics facility;
The work request is a request for conveying an article in a physical distribution facility.

In other words, even when an abnormality occurs in the second layer computer that manages the conveyance information of articles in the entire distribution facility, the second layer program executed in the second layer computer is used to operate the article conveyance device. It can be executed instead of the first layer computer that manages the device controller to be controlled. Accordingly, it is possible to appropriately operate the article conveying device in the distribution facility while suppressing a decrease in the processing efficiency of the entire facility control system in the distribution facility.

Overall plan view of logistics facilities Diagram showing functional block and network connection of equipment management system Flow chart for processing during alternative execution The figure which shows the display screen of the selection means The figure which shows the display screen of the selection means Diagram showing alternative state of program Diagram showing alternative state of program

The case where the equipment control system according to the present invention is applied to the physical distribution equipment 1 will be described with reference to the drawings.
As shown in FIG. 1, the logistics facility 1 includes an entry / exit conveyor for delivering an article B between an automatic warehouse J including an article storage shelf 2 and a stacker crane 51 and a stacker crane 51 provided in the automatic warehouse J. 52, the receiving / shipping conveyor 53 as the receiving section 5 for receiving the article B from the outside or the shipping section 6 for shipping, and the loading / unloading conveyor 52 and the receiving / shipping conveyor 53 that can travel along the traveling rail 4 And a sorting cart 50 for placing and transporting articles between them.

  The article storage shelf 2 is configured in such a manner that a plurality of article storage sections are arranged vertically and horizontally and the front side is opened for taking in and out the articles, and a plurality of the article storage shelves 2 are provided in a state of facing the front side. A traveling rail 3 for traveling the stacker crane 51 is provided between the article storage shelves 2 facing each other.

The stacker crane 51 includes a traveling carriage provided with traveling wheels that can travel and move on the traveling rail 3, and a lifting guide mast erected on the traveling carriage, and is lifted and lowered in a state in which the lifting platform is supported by the lifting guide mast. It is configured to be movable. And it is comprised so that an article | item can be transferred between the transfer apparatus with which an elevator stand is equipped, and an article | item storage part.
A ground-side controller 51 h that controls the operation of the stacker crane 51 is provided at one end of the traveling rail 3. In addition, the traveling vehicle of the stacker crane 51 is provided with a moving body side controller (not shown). And the ground side controller 51h and the mobile body side controller are comprised so that communication is mutually possible by infrared rays etc. A stacker crane controller 51C is configured by the ground side controller 51h and the moving body side controller.
In the vicinity of the transfer device of the stacker crane 51, an article identification sensor S1 for reading article identification information (information recorded on a barcode, IC tag, etc.) is provided, and the read information is input to the stacker crane controller 51C. It is comprised so that.

The loading / unloading conveyor 52 can transfer articles between the shelf-side loading / unloading location 52a, which is the end of the article storage shelf 2 that can transfer articles to and from the stacker crane 51, and the sorting cart 50. A trolley side loading / unloading location 52b, which is an end located on the side of the traveling rail 4 of the sorting trolley 50, which is provided in such a state. The loading / unloading conveyor 52 is configured to be controlled by a loading / unloading conveyor controller 52C.
Article identification sensors S2a and S2b for reading article identification information (information recorded on a barcode, IC tag, etc.) are provided at the shelf side entry / exit location 52a and the cart side entry / exit location 52b, respectively.

  The sorting cart 50 is configured to be able to run while detecting its own running position by a known method such as a rotary encoder or dog detection, and its operation is controlled by the sorting cart controller 50C. Further, in the vicinity of the article placement section provided in the sorting cart 50, a carriage article sensor S0 that reads identification information (information recorded on a barcode, an IC tag, etc.) of the article B that is placed and conveyed by itself is provided. .

  The incoming / outgoing conveyor 53 includes an incoming conveyor 5 as an incoming part for receiving an article B from the outside, and a shipping conveyor 6 as an outgoing part for shipping the article B to the outside. The operations of the receiving conveyor 5 and the shipping conveyor 6 are controlled by the receiving / shipping conveyor controller 53C. Further, the identification information of the item B (information recorded on a bar code, a wireless IC tag, etc.) is provided at the upstream end of the delivery conveyor 5 in the article conveyance direction and the upstream end of the shipment conveyor 6 in the article conveyance direction. ) Is provided. The article identification sensors S5 and S6 are provided.

  That is, a stacker crane 51 as an equipment device, a loading / unloading conveyor 52, an incoming / outgoing conveyor 53, a sorting cart 50, and a stacker as an equipment controller C that is provided corresponding to each equipment equipment and controls the operation of the equipment equipment. A crane controller 51C, a loading / unloading conveyor controller 52C, a loading / unloading conveyor controller 53C, and a sorting cart controller 50C are provided.

  The device controller C is configured by, for example, a microcomputer, and can transmit and receive data to and from each facility device through a communication interface such as a serial interface or an infrared communication interface. The communication interface is not limited to the above, and various interfaces can be used as long as real-time performance can be ensured.

As shown in FIG. 2, the facility control system is a device controller for which a plurality of device controllers C and the device controller C is responsible for all or part of the device controllers C. One or a plurality of first layer computers 10 for executing one or a plurality of first layer programs 11 for instructing an operation command and managing an operation result of the facility device transmitted from the device controller C; In response to a work request that is a request for work to be realized by operating the equipment, one or more first-layer computers 10 are operated to operate the equipment required to process the work request. A work command and a work request based on the operation result of the equipment transmitted from the first layer computer 10 And a single second layer computer 20 to execute the second layer program 21 for performing results management tasks that.
One or a plurality of first layer computers 10 commands a device operation command to one or a plurality of device controllers C in charge of the first layer computer 10 in accordance with a work command from the second layer computer 20. Therefore, one or a plurality of first layer programs 11 are configured to be executed.

  In addition, the facility control system executes one or a plurality of monitoring programs 31 that collect and display information on the operating state of the facility equipment from one or a plurality of first layer computers 10 or second layer computers 20. The monitoring computer 30 is provided.

Hereinafter, description will be made based on FIG. 2 showing the configuration and connection of the equipment controller C, the first layer computer 10, the second layer computer 20, and the monitoring computer 30 attached to the facility control system constituting the facility control system. To do. FIG. 2 illustrates an example of the equipment control system. The first layer computer 10 may be one or three or more, and the monitoring computer 30 may be two or more.

As shown in FIG. 2, the device controller C, the first layer computer 10, the second layer computer 20, and the monitoring computer 30 are connected to each other via a communication line L via a network interface. The communication line L is configured as, for example, a LAN having a star topology, and configured to perform communication using TCP / IP.
As for the LAN segment, any device controller C, first layer computer 10, second layer computer 20, and monitoring computer 30 may be configured to communicate with each other, and all of the computers shown in FIG. It does not have to belong to the same segment.

In FIG. 2, as the first layer computer 10, a configuration including a conveyor charge first layer computer 10 a in charge of a loading / unloading conveyor and a crane charge first layer computer 10 b in charge of a stacker crane is illustrated.
In the present embodiment, the first layer computer 10 is provided with a first layer computer in charge of the sorting cart 50 and a first layer computer in charge of the receipt / shipment conveyor 53 in addition to the above. Since it is the same structure as the conveyor charge 1st layer computer 10a and the crane charge 1st layer computer 10b, description is abbreviate | omitted.
As the first layer computer 10a in charge of the conveyor and the first layer computer 10b in charge of the crane, for example, a relatively inexpensive computer that is not a dedicated computer, such as a personal computer or a PC server, can be used. The conveyor first layer computer 10a and the crane first layer computer 10b are provided with a CPU, a main memory, a hard disk, a display, a keyboard, a pointing device (mouse), etc., and a network interface.

  Each of the first layer computer 10a in charge of the conveyor and the first layer computer 10b in charge of the crane is installed with the first layer program 11a of the conveyor in charge for the loading / unloading conveyor and the first layer program 11b of the crane in charge of the stacker crane. The second layer program 21, the database program 25 used by the second layer program 21, a service switching program 43 as a selection means and an alternative command output means described later, a message queue program 44 as a buffer means described later, and monitoring Program 31 is installed.

In the first layer computer 10a in charge of the conveyor, during normal operation (that is, when the program to be executed by another computer is not executed in substitution), among the above installed programs, the conveyor conveyor The first layer program 11a in charge of the conveyor and the service switching program 43 are executed.
In addition, the crane first layer computer 10b executes the crane first layer program 11b for the stacker crane, the service switching program 43, and the message queue program 44 among the above installed programs during normal operation. Has been.

As the second layer computer 20, a computer having a processing capability higher than that of the first layer computer 10 is used. The processing capability here is a concept relatively defined by the calculation speed of the CPU, the access speed to the hard disk, and the like. The second layer computer 20 is installed with the second layer program 21 and the database program 25 used by the second layer program 21. In addition, a service switching program 43, a message queue program 44, a monitoring program 31, a conveyor The charge first layer program 11a and the crane charge first layer program 11b are installed.
In the second layer computer 20, the second layer program 21, the database program 25, and the service switching program 43 among the above installed programs are executed during normal operation.

As the monitoring computer 30, a computer having the same or lower processing capability as the first layer computer 10 can be used. A monitoring program 31 is installed in the monitoring computer 30. In addition, a service switching program 43, a message queue program 44, and a conveyor charge first layer program 11a are installed.
In the monitoring computer 30, the second layer program 21, the database program 25, and the service switching program 43 among the above installed programs are executed during normal operation.

Next, processing executed by each program installed in the first layer computer 10, the second layer computer 20, or the monitoring computer 30 will be described.
The message queue program 44 is installed in all of the first-layer computer 10, the second-layer computer 20, and the monitoring computer 30 described above, and is executed by any one of the computers (for example, the first-layer computer 10b in charge of the crane). It is in a state. The message queue program 44 includes data on work commands transmitted from the second layer computer 20 to the first layer computer 10 and facility equipment transmitted from the first layer computer 10 to the second layer computer 20. Data related to the operation result is accumulated in a message queue constituted by a memory area of a first-in first-out (FIFO) system, and the IP addresses assigned to the first layer computer and the second layer computer are used as identification information between them. Data transmission / reception is relayed based on the IP address.
Specifically, all the first-layer computers and second-layer computers use the above-described work command data and operation result data as a computer on which the message queue program 44 is executed (hereinafter referred to as “message queue program execution computer”). To the first layer computer 10b in charge of the crane. When the crane charge first layer computer 10b receives the work command data and the operation result data, it stores them in the message queue of the message queue program 44.
By the way, the accumulated work command data and operation result data are stored in the message queue for a set time with a sufficiently small time as compared with the time required for switching, and are deleted from the message queue when the set time elapses. The

  The second layer program 21 relates to a work command for instructing conveyance of an article in accordance with a work request generated by the higher-level input means or system (for example, “ship 10 products α to the customer A”). Data (referred to as work command data) is transmitted with the IP address assigned to the crane charge first layer computer 10b being the message queue program execution computer as the destination. The work command data includes identification information (article ID) of an article to be conveyed, an initial conveyance position (From data) of the article, and a conveyance target position (To data) of the article. Receiving the work command data, the crane charge first layer computer 10b stores the work command data in a message queue formed in the memory area of the crane charge first layer computer 10b by the message queue program 44 described later.

The conveyor layer first layer programs 11a and 11b executed by the conveyor layer first layer computers 10a and 10b receive work command data stored in the message queue of the message queue program 44 distributed from the crane layer first layer computer 10b. Then, processing is performed in the order of arrival as work instructions. That is, in order to operate the equipment required for processing the work request, a device operation command is commanded to the device controller C according to the work command data.
Since the work command based on the work command data is realized by using one or more of a plurality of types of equipment in the distribution facility 1, a plurality of first layer computers 10 are obtained for one work command data. Controls the equipment that he is in charge of.

Specifically, when the work command data is “conveying the item B with the item ID β from a certain item storage unit in the item storage shelf 2 to the shipping unit 6”, first, the work in charge of the crane for the stacker crane 51 is performed. The first layer program 11b gives an equipment operation command for operating the stacker crane 51 to the stacker crane controller 51C to convey the article B with the article ID β from the article storage unit to the shelf side entry / exit location 52a of the entry / exit conveyor 52. Command.
When the stacker crane 51 transfers the article B with the article ID β to the shelf-side entry / exit location 52a of the entry / exit conveyor 52, the stacker crane controller 51C uses the article identification sensor S2a provided at the shelf-side entry / exit location 52a to identify the article ID of the article. And the article ID is transmitted to the conveyor charge first layer program 11a for the loading / unloading conveyor 52.

When the article ID received from the stacker crane controller 51C is the article ID β for which conveyance is instructed by the work command data, the conveyor charge first layer program 11a The apparatus operation command which conveys the articles | goods B mounted in 52 to the cart side entrance / exit location 52b from the shelf side entrance / exit location 52a is instruct | indicated.
When the article B reaches the trolley side entry / exit location 52b, the entry / exit conveyor controller 52C reads the article ID of the article with the article identification sensor S2b provided at the trolley side entry / exit location 52b, and continues to convey the article B. The article ID is transmitted to the first layer program 11 in charge of the carriage 50.
In this way, the first layer computer 10 commands the work controller to the device controller C that it is in charge of until the article B with the article ID β commanded by the work command data reaches the conveyance target position. Will be transported.

When each of the device controllers C completes the operation required for processing the work commanded by the work command data, the device controller C reports the operation result, that is, the work command data unique identification number and the work command data. Is transmitted to the first layer computer 10 that executes the first layer program 11 in charge of the data (hereinafter, referred to as operation result data).
Each of the first layer programs 11 transmits the operation result data received from the device controller C with the IP address assigned to the crane charge first layer computer 10b, which is a message queue program execution computer, as a destination.

The crane charge first layer computer 10b that has received the operation result data accumulates the operation result data in the message queue of the message queue program 44 and transmits the operation result data to the second layer computer 20 set as the delivery destination. The second layer program 21 executed by the second layer computer 20 processes the operation result data accumulated in the message queue of the message queue program 44 distributed from the message queue program execution computer in the order of accumulation.
Specifically, when receiving the operation result data, the second layer program 21 instructs the database program 25 executed on the same computer as the second layer program 21 to identify the identification number of the work command data and the device controller C. The database for associating the operation result data from is updated at any time. Then, by referring to the database, the second layer program 21 can know which equipment device has completed the processing corresponding to the work command data until the transfer operation.

  The monitoring program 31 is executed by a monitoring computer 30 (server) provided in one (or more than one) system. A plurality of monitoring terminals can be connected to the monitoring computer 30, and the monitoring terminal displays statistical data processed by the monitoring program 31. The monitoring program 31 collects information from one or more of the device controller C, the first layer program 11, and the second layer program 21, and monitors the state of part or all of the facility device or facility control system. (Monitoring) is configured to be possible. As an example, the monitoring program 31 receives various kinds of information such as information on the operation positions of the stacker crane 51 and the sorting cart 50 as equipment and the MTBF (average failure time interval) or failure information of the loading / unloading conveyor 52. The monitor computer 30 can be displayed on the display device or the monitoring terminal.

The service switching program 43 selects a program that has been executed on the computer in which the abnormality has occurred as a replacement target program, and selects whether or not the replacement target program is to be executed on another computer by manipulating the replacement target program. An alternative command to be executed by another computer is output.
Specifically, the service switching program 43 includes a background execution unit that is executed in the background and a user interface unit that displays information to the user and inputs a command from the user. The service switching program 43 is installed in one or a plurality of computers, and the installed computers are the first layer computer 10, the second layer computer 20, and the monitoring computer 30 constituting the equipment control system. Any one or more of them may also be used, and other computers that belong to the same network and can communicate with each other (for example, servers such as mail servers and file servers, or business terminals) may be used. .

The service switching program 43 instructs the identification information takeover command to cause the first layer computer 10 to take over the IP address assigned to the second layer computer 20 when an abnormality occurs in the second layer computer 20. It is configured.
As a result, the data transmitted to and received from the second layer computer 20 before the identification information takeover command is commanded takes over the IP address of the second layer computer 20 after the identification information takeover command is commanded. It is possible to transmit / receive data to / from the first layer computer 10. Therefore, the computer which comprises the said equipment management system can perform transmission / reception of information, without being conscious of having changed the transmission / reception destination computer before and after substitution.

  The background execution unit is activated as a background process simultaneously with the activation of the computer in which the service switching program 43 is installed. In addition, the service switching program 43 receives start notification data indicating that the service switching program 43 is being started for all the computers on which the service switching program 43 is started every set time (for example, 5 seconds). Send. The activation notification data is transmitted by UDP multicast. Then, the background execution unit of the service switching program 43 manages the starting or stopping of the computer (hereinafter referred to as the service switching program execution computer) on which the service switching program 43 is executed based on the received startup notification data. Is configured to update the startup computer list.

The user interface unit is not executed during normal operation, and is activated by a user activation command (for example, clicking an icon). As shown in FIGS. 4 and 5, when the user interface unit is activated, an information window W1 for displaying a list of activation states of each service switching program execution computer for the user is displayed on the display. FIG. 4A shows a state in which the conveyor first layer computer 10a, the crane first layer computer 10b, the second layer computer 20, and the monitoring computer 30 (server 1 to server 4) are operating normally. FIG. 4B shows a state where an abnormality has occurred in the second layer computer 20 (server 1) and the second layer program 21 has stopped.
That is, whether or not the service switching program 43 causes the first layer computer 10 to execute the second layer program 21 executed by the second layer computer 20 when an abnormality occurs in the second layer computer 20. Substitution instruction for executing the second layer program 21 executed by the second layer computer 20 in which an abnormality has occurred as an alternative target program in accordance with selection means selected by human operation and the selection information selected by the selection means And alternative command output means for commanding.

  Hereinafter, when an abnormality occurs in the second layer computer 20 and the second layer program 21 is stopped, the flow of work until the second layer program 21 is executed by another computer is shown in the flowchart of FIG. 3 and FIG. And it demonstrates based on the screen transition diagram of FIG.

As shown in FIG. 3, when a user who has learned from an alarm display or the like that an abnormality has occurred in the second layer computer 20 and the second layer program 21 has stopped is activated, the user interface unit of the service switching program 43 is activated. The information window W1 shown in FIG. 4 (b) is displayed (# 1).
An “end” button is displayed in the information window W1, and after confirming the state of each computer in the information window W1, if it is determined that no action is required, an end can be instructed ( # 2).

If the end is not selected in # 2, the service switching program 43 waits for an input specifying a computer to be processed.
In this embodiment, two first layer computers 10 are provided, and the two first layer computers 10 are set as alternative candidate computers.
When the second layer computer 20 is designated in the information window W1 (for example, the mouse pointer is positioned in a rectangular area corresponding to the second layer computer 20 and the mouse button is clicked), the activation is performed as shown in FIG. Computers that can execute the second layer program 21 are displayed based on the information managed in the computer list, and the computer on which the second layer program 21 is to be executed is selected by an artificial operation (that is, an alternative destination) A selection window W2 for selecting and inputting a computer is displayed.
In the selection window W2, two first layer computers 10 set as alternative candidate computers (that is, the first layer computer 10a in charge of the conveyor and the first layer computer 10b in charge of the crane) are displayed as selectable computers. And, it is configured to be able to select which one of the programs to be replaced is executed by manual operation (# 3 to 5).
4 and 5 exemplify the case where information of four computers, that is, the two first layer computers 10, the second layer computer 20, and the monitoring computer 30, is displayed in the information window W1, The information window W1 can display more computer information by scrolling display contents or changing pages.

  In the selection window W2, when the server 2, that is, the crane charge first layer computer 10b is selected and input as an alternative computer and the "confirm" button is pressed, the service switching program 43 is executed on the second layer computer 20. A substitute command for causing the crane charge first layer computer 10b to execute the two-layer program 21 as a substitute target program is commanded (# 6, # 7). At this time, the second layer computer 20 is physically disconnected from the network in consideration of the case where the second layer program 21 executed on the second layer computer 20 in which an abnormality has occurred is not properly stopped. It is desirable to keep it (for example, disconnect the LAN cable).

  The service switching program 43 starts the second layer program 21 installed in the crane first layer computer 10b and the database program 25 used by the second layer program 21 in accordance with the alternative command. The service switching program 43 can define dependency relations for program use. In the above case, since the second layer program 21 uses the database program 25, the database program 25 is started first and then the second layer. The program 21 is started.

The service switching program 43 starts the second layer program 21 installed in the crane first layer computer 10b in accordance with the substitute instruction, and then assigns the IP address assigned to the second layer computer 20 in which an abnormality has occurred. The virtual IP address is assigned to the network interface of the crane charge first layer computer 10b. Thereafter, the computer constituting the equipment management system replaces the second layer program 21 executed by the second layer computer 20 with the second layer program 21 executed by the crane charge first layer computer 10b. Send and receive.
The second layer program 21 executed by the crane charge first layer computer 10b is based on the work command data accumulated in the message queue by the message queue program 44 executed by the crane charge first layer computer 10b. A work command is instructed to each first layer computer 10.

If an abnormality occurs in the monitoring computer 30 and the monitoring computer 30 is selected in # 3, the monitoring program 31 that has been executed in the monitoring computer 30 can be executed in the selection window W2. The computer is displayed, and the computer on which the monitoring program 31 is executed is selected by human operation (that is, the alternative computer is selected and input) (# 3 to 5). Then, as described above, when the alternative computer is selected in the selection window W2 and the “OK” button is pressed, the service switching program 43 stops the monitoring program 31 being executed on the monitoring computer 30. A command is issued to the monitoring computer 30, and subsequently, a second substitution command is issued to cause the substitution destination computer to execute the monitoring program 31 executed on the monitoring computer 30 in which an abnormality has occurred as a substitution target program. (# 6, # 7).
The service switching program 43 starts the monitoring program 31 installed in the first layer computer 10 in accordance with the substitution instruction, and then uses the IP address assigned to the monitoring computer 30 in which an abnormality has occurred as the substitution destination. It is given as a virtual IP address to the network interface of the computer (specified one of the conveyor layer first layer computer 10a, the crane layer first layer computer 10b, or the second layer computer 20). Thereafter, the computer constituting the equipment management system transmits and receives information to and from the monitoring program 31 executed by the computer designated as an alternative destination instead of the monitoring program 31 executed by the monitoring computer 30. Will do.

  After the completion of the process of # 7, the service switching program 43 is configured to return to the process of # 2. This is because, when an abnormality occurs in a plurality of first layer computers 10, the processes of # 3 to # 7 may be repeated for the number of first layer computers 10 in which an abnormality has occurred. If “END” is instructed, the user interface unit can be ended.

  Next, an alternative command pattern commanded by the service switching program 43 will be described with reference to FIGS. FIG. 6 is a diagram for explaining the alternative form described in the flowchart of FIG. 3 and FIGS. 4 and 5. When an abnormality occurs in the second layer computer 20, the abnormality occurs in the second layer computer 20. The case where the second layer program 21 that has been executed is executed by the crane charge first layer computer 10b is shown.

  FIG. 7 shows that when an abnormality occurs in the second-layer computer 20 and the monitoring computer 30, the second-layer program 21 and the monitoring program 31 as programs to be replaced are executed by the crane first-layer computer 10b. The case where it makes it show is shown.

  Thus, according to the equipment control system concerning this embodiment, when abnormality arises in the 2nd layer computer 20, the 2nd layer program 21 which the said 2nd layer computer 20 was running is the 1st layer computer. By selecting whether or not to execute at 10 by manual operation, it is possible to suppress a decrease in the processing efficiency of the entire equipment control system, and the second layer computer 20 that has been executed by the second layer computer 20 in which an abnormality has occurred. By causing the two-layer program 21 to be executed by the first-layer computer 10 originally used in the equipment control system, it is possible to suppress an increase in equipment cost without requiring a separate computer for replacement. A possible equipment control system can be provided.

[Another embodiment]
(1) In the above embodiment, in order to stop the second layer program 21 that has been executed in the second layer computer 20 in which an abnormality has occurred when the substitute command output means commands a substitute command, the second layer The configuration in which the stop command is instructed to the computer 20 has been exemplified, but instead of such a configuration, it is checked whether the second layer program 21 is stopped and the check result is displayed. May be.

(2) In the above embodiment, the message queue program 44 uses the IP addresses assigned to the first layer computer 10 and the second layer computer 20 as identification information, and sends and receives data between them based on the IP address. The configuration is illustrated in which the relay is performed and the identification information takeover command is issued to cause the first layer computer 10 to take over the IP address assigned to the second layer computer 20 when an abnormality occurs in the second layer computer 20. Instead of such a configuration, data transmission / reception between the first layer computer 10 and the second layer computer 20 is relayed based on the host name using the host name as identification information, and the second layer computer 20 has an abnormality. Identification that allows the first layer computer 10 to take over the host name assigned to the second layer computer 20 when it occurs It may be configured to direct the broadcast takeover command.

  In the above embodiment, after the service switching program 43 starts the replacement target program installed in the replacement destination computer in accordance with the replacement instruction, the IP address assigned to the computer in which the abnormality has occurred is replaced with the replacement destination program. Although the configuration is such that a virtual IP address is assigned to the network interface of the computer, instead of such a configuration, after starting the replacement target program installed in the replacement destination computer using the host name as identification information, The host name assigned to the generated computer may be assigned to the alternative computer.

(3) In the above embodiment, the substitution command output means can output the second substitution command that causes the monitoring program 31 that has been executed by the monitoring computer 30 in which an abnormality has occurred to be executed as the second substitution target program. Although the configuration is exemplified, the monitoring program 31 may be configured not to be a replacement target program.

(4) In the above embodiment, when the article B arrives at the terminal end side of the conveyance by the equipment, the article ID is transmitted to the first layer program 11 in charge of the equipment controller C of the equipment that continues to carry. In the work command data, the first layer program 11 instructed the device operation command to the device controller C in order to sequentially operate the equipment from the transfer initial position to the transfer target position. However, instead of such a configuration, The equipment controller C reports the completion of the operation of the equipment to the first layer program 11 in charge of the equipment controller C, and the first layer program 11 supplies the article to the first layer program 11 in charge of the equipment to be operated next. It is good also as a structure which transmits / receives information between the 1st layer programs 11 by the form which notifies the conveyance start request | requirement which starts conveyance of B. FIG.

(5) In the above embodiment, the configuration in which the first layer computer 10 issues an operation command to one type of device controller C has been exemplified. However, instead of such a configuration, one first layer computer 10 However, you may comprise so that an operation command may be instruct | indicated with respect to multiple types of apparatus controller C. FIG. As such an example, there may be a case where only one first layer computer 10 is provided in an equipment control system that controls the operation of equipment equipment in a warehouse equipped with, for example, a stacker crane 51, a loading / unloading conveyor 52, a sorting cart 50 and the like. It is done. When configured in this manner, the first layer computer 10 sequentially transmits commands to the stacker crane controller 51C, the loading / unloading conveyor controller 52C, and the sorting cart controller 50C in accordance with the commands of the received work command data.

(6) In the above embodiment, the first layer computer 10 is configured to include two computers having substantially the same capability, and which of the two first layer computers 10 is caused to execute the second layer program by the selection means. Although it was configured to be selectable by human operation, instead of such a configuration, a high-performance computer having a processing capability capable of executing both the first layer program and the second layer program at the same time, A low-capacity computer having a processing capability capable of executing only the one-layer program may be provided, and the high-capacity computer may be set as an alternative candidate computer. With this configuration, when a high-capacity computer and a low-capacity computer exist as the first-layer computer 10, the second-layer program is executed on the low-capacity computer to reduce the processing efficiency of the entire equipment control system. Can be avoided.

(7) In the above embodiment, the configuration in which the facility control system of the present invention is applied to the distribution facility 1 has been described. However, instead of such a configuration, for example, the facility control system of the present invention may be applied to a production line. Is possible. That is, the equipment is composed of various production apparatuses in the production line, the first layer computer 10 is configured to manage the equipment controller C that controls the operation of the production apparatus, and the second layer computer 20 is the entire production equipment. It may be configured so as to manage the conveyance information of the article, and the work request may be a production request for the article in the production facility.

(8) In the above embodiment, the communication line L is configured as a star topology LAN and configured to perform communication using TCP / IP. However, the present invention is not limited to such a configuration. Absent. For example, the network topology may be a bus type or a ring type, and a unique protocol may be used for the network protocol.

(9) In the above-described embodiment, the configuration in which the message queue program 44 is executed by the crane first layer computer 10b is exemplified. However, the configuration is not limited to such a configuration. It may be configured to be executed by the computer 10 (the conveyor layer first layer computer 10a or the like), the second layer computer 20 or the like, and the computer that executes the message queue program 44 can be arbitrarily set. In this case, if an abnormality occurs in the computer on which the message queue program 44 is executed, the substitution destination computer is substituted by the substitution instruction commanded by the service switching program 43 as shown in the above embodiment. Instead of the configuration, various configurations can be applied, such as substituting with a preset backup computer.

(10) In the above embodiment, considering the case where the second layer program 21 executed on the second layer computer 20 in which an abnormality has occurred is not properly stopped, the second layer computer 20 is physically generated. However, instead of such a configuration, when the service switching program 43 serving as an alternative command output means instructs an alternative command, the second layer computer 20 in which an abnormality has occurred is used. In order to stop the second layer program 21 being executed, a stop command may be instructed to the second layer computer 20.

C device controller 10 first layer computer 11 first layer program 20 second layer computer 21 second layer program 30 monitoring computer 31 monitoring program 43 service switching program 44 message queue program W2 selection window

Claims (5)

One or more equipment and one or more equipment controllers that control the operation of the equipment;
The device controller that is responsible for all or part of one or more of the device controllers, and commands the device operation command for the equipment device to the device controller and is transmitted from the device controller One or more first layer computers for executing one or more first layer programs for managing the operation results of the equipment;
One or more first layers to activate the equipment required to process the work request according to a work request that is a request for work to be achieved by operating the equipment. A second layer program for instructing a work command to the computer and managing the result of the work related to the work request based on the operation result of the equipment transmitted from the first layer computer is executed. An equipment control system comprising a single second tier computer,
One or a plurality of the first layer computers, according to the work command, instruct one or a plurality of device controllers to be in charge of one or a plurality of device controllers in charge of the first layer computer. Configured to execute a first layer program;
When an abnormality occurs in the second layer computer, whether or not to cause one or more first layer computers to execute the second layer program executed by the second layer computer is selected by human operation. A selection means is provided,
An alternative command output means for instructing an alternative command for executing the second layer program executed by the second layer computer in which an abnormality has occurred as a replacement target program;
The alternative command output means is configured to output the alternative command according to the selection information selected by the selection means;
The facility control system configured to execute the substitution target program based on the substitution command output by the substitution command output means. Two or more of the plurality of first layer computers are set as alternative candidate computers capable of executing the second layer program,
The equipment control system according to claim 1, wherein the selection unit is configured to be able to select which one of the replacement candidate computers to execute the replacement target program by human operation. As the first layer computer, a high capacity computer having a processing capability capable of executing both the first layer program and the second layer program at the same time, and a processing capability capable of executing only the first layer program. A low-capacity computer with
The facility control system according to claim 2, wherein the high-capacity computer is set as the alternative candidate computer. Buffer means for relaying the data of the work command and the data of the operation result communicated between the first layer computer and the second layer computer are provided,
The buffer means is configured to relay the transmission / reception of data between the first layer computer and the second layer computer based on the identification information in a form in which identification information is given to each of the first layer computer and the second layer computer.
The substitute command output means commands an identification information takeover command for causing the first layer computer to take over the identification information given to the second layer computer when an abnormality occurs in the second layer computer. The equipment control system according to any one of claims 1 to 3, wherein the equipment control system is configured as follows. The equipment is composed of an article transport device in a logistics facility,
The first layer computer is configured to manage the device controller that controls the operation of the article transporting device;
The second-layer computer is configured to manage conveyance information of articles in the entire logistics facility;
The facility control system according to any one of claims 1 to 4, wherein the work request is a request for conveying an article in a physical distribution facility .

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