JP4278580B2 - Program change method, programmable controller, and program editing apparatus. - Google Patents

Description

  The present invention relates to a program change method for a programmable controller, a programmable controller, and a program editing apparatus.

  When the sequence program of the programmable controller is changed, the start address where the circuit to be changed exists, the circuit size before the change, the circuit size after the change, information on the circuit after the change, and the like are required.

  Conventionally, a sequence program is changed without using a function block (FB (Function Block)) which is a component circuit in which logics are grouped. In this case, since the circuit contents to be changed are different from each other, the start address of the circuit change position for each circuit to be changed, the circuit size before the change, the circuit size after the change, the circuit change such as the circuit after the change, etc. It is necessary to write information to the programmable controller and change the sequence program.

  In the program change method of the programmable controller described in Patent Document 1, a plurality of modules to be changed at the same time are once created in an empty area on the program memory and activated collectively based on an operator's command. . This activation is performed by rewriting the directory that holds the start address of the execution module, etc., and when the modules in the buffer memory are activated, the corresponding modules that were valid until then are invalidated. .

JP-A-5-224707

  According to the above conventional technique, it is possible to change a plurality of modules simultaneously online, but when there are a plurality of modules to be changed, even if the modules to be changed are the same, each module is changed. Information about module changes needs to be written to the programmable controller. For this reason, the amount of information related to the module change to be written to the programmable controller increases, it takes a long time to write the information related to the module change, and a large amount of memory capacity is required to write the information related to the module change. was there.

  The present invention has been made in view of the above, and an object of the present invention is to obtain a program change method, a programmable controller, and a program editing device that require a small amount of information to be written to the programmable controller when the program is changed.

  In order to solve the above-described problems and achieve the object, the present invention is connected to the programmable controller in the program change method of the sequence program of a programmable controller having a sequence program having a plurality of the same functional block circuits. A program transmission step for transmitting program change information for changing the sequence program from an external device, a program storage step for storing the program change information transmitted from the external device by the programmable controller, and the stored program A program change step for changing the sequence program of the programmable controller based on the change information, the program change information relates to a functional block circuit to be changed Characterized in that it has information about a plurality of addresses for storing the functional block circuits the change in distribution and in the sequence program.

  According to the present invention, the program change information for changing the sequence program has only one circuit change information regarding the same functional block circuit even when the same functional block circuit is changed at a plurality of locations. Therefore, the amount of information written from the external device to the programmable controller can be reduced.

  According to the present invention, since it is possible to reduce the amount of information written from the external device to the programmable controller, the time for writing the program change information for changing the sequence program from the external device to the programmable controller is shortened, and the program There is an effect that the size of the memory for storing the change information can be reduced.

  Embodiments of a program changing method, a programmable controller, and a program editing apparatus according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment FIG. 1 is a diagram showing a configuration of a program change system according to an embodiment of the present invention. The program change system includes a programmable controller 10 and a sequence program editing device 20, and the programmable controller 10 and the sequence program editing device 20 are connected by communication means 40. The programmable controller 10 includes an arithmetic device (program change unit) 11, a memory unit (program storage unit) 30, an editing device I / F unit (information receiving unit) 15, and a device information I / F unit 16.

  The editing device I / F unit 15 includes a program (a sequence program 70 described later) created by the sequence program editing device 20, information related to a program change when changing the sequence program 70 (a program change information 50 described later), and the like. Is a communication interface for receiving.

  The device information I / F unit 16 is a communication interface that transmits / receives information to / from an external device (not shown). The device information I / F unit 16 receives information such as ON / OFF of the switch of the external device as information related to the state of the external device from the external device.

  The memory unit 30 includes a change information storage unit 12, a sequence program storage unit 13, and a device storage unit 14. The change information storage unit 12 is a memory that stores (stores) the program change information 50. The sequence program storage unit 13 is a memory for storing a sequence program 70 that is created by the sequence program editing apparatus 20 or the like and that controls an external device. The device storage unit 14 is a device memory that stores information on the state of the external device and the calculation result of the sequence program by the calculation device 11.

  The arithmetic device 11 executes the sequence program stored in the sequence program storage unit 13. The arithmetic unit 11 sets the execution result of the sequence program in the device storage unit 14 and outputs the set execution result to the external device via the device information I / F unit 16. The programmable controller 10 performs sequence control of the external device by repeating the processing by the arithmetic device 11. The arithmetic unit 11 changes the sequence program stored in the sequence program storage unit 13 based on the program change information 50 stored in the change information storage unit 12. The program change process by the arithmetic unit 11 corresponds to the program change unit described in the claims.

  The sequence program editing device 20 is a device for creating and editing the sequence program 70 and the like, and is composed of, for example, a personal computer. The sequence program editing apparatus 20 includes a program creation unit 21, a change information creation unit 22, and a communication I / F unit 23.

  The program creation unit 21 creates a sequence program 70 to be executed by the programmable controller 10. The change information creation unit 22 creates program change information 50 for changing the sequence program 70. The communication I / F unit 23 is a communication interface that transmits and receives information to and from the programmable controller 10. The communication I / F unit 23 transmits the sequence program created by the program creation unit 21 and the program change information 50 created by the change information creation unit 22 to the programmable controller 10.

  The communication means 40 has a function of transmitting and receiving information between the programmable controller 10 and the sequence program editing device 20. The communication means 40 may be a communication network such as a LAN (Local Area Network) or the Internet, or may be configured to directly connect the programmable controller 10 and the sequence program editing device 20.

  Next, a program change processing procedure of the program change system will be described. FIG. 2 is a flowchart showing a processing procedure for changing the sequence program. The program creation unit 21 of the sequence program editing apparatus 20 creates a sequence program 70 to be executed by the programmable controller 10 and transmits the sequence program 70 to the programmable controller 10 via the communication I / F unit 23 and the communication means 40.

  The programmable controller 10 stores the sequence program (sequence program before change) 70 in the sequence program storage unit 13 and operates based on the sequence program 70. Thereafter, when it becomes necessary to change the sequence program 70, a new sequence program 70 is created by the program creation unit 21 of the sequence program editing apparatus 20. Then, the change information creation unit 22 creates the program change information 50 based on the sequence program before the change and the new sequence program.

  The communication I / F unit 23 of the sequence program editing device 20 transmits program change information 50 for changing the sequence program of the programmable controller 10 to the programmable controller 10 via the communication means 40.

  FIG. 3 is a diagram illustrating an example of a sequence program. As shown in FIG. 3, the sequence program 70 includes a plurality of programs. In the sequence program 70, the same circuit is stored in address A to address (A + 1) and address B to address (B + 1). Here, a case is shown in which the circuits stored in address A to address (A + 1) and address B to address (B + 1) are “LD M0, OUT M2”. In this circuit, LD indicates a contact input command, OUT indicates a coil output command, and M indicates the type of internal device. This circuit is a circuit of a sequence program with a content such as “M2 device is turned on when M0 device is on, and M2 device is turned off when M0 device is off”.

  Program change information 50 from the sequence program editing device 20 is written to the change information storage unit 12 via the editing device I / F unit 15 of the programmable controller 10 (step S100).

  Here, the configuration of the program change information 50 will be described. FIG. 4A is a diagram of a configuration of program change information according to the embodiment. Here, program change information 50 in the case where the circuits of address A to address (A + 1) and address B to address (B + 1) of the sequence program 70 shown in FIG. 3 are changed to “LD M1, OUT M2” is shown. . In the present embodiment, the same circuits stored in address A to address (A + 1) and address B to address (B + 1) are collectively changed.

  The program change information 50 includes the number of changed circuits, circuit change information 51 (pre-conversion circuit size, post-change circuit size, post-change circuit), and head addresses corresponding to the number of changed circuits. The number of changed circuits indicates the number of circuits to be changed in the sequence program. Here, since the number of circuits to be changed in the system program is two (address A to address (A + 1) and address B to address (B + 1)), “2” is shown as the number of changed circuits.

  The pre-conversion circuit size indicates the size of the memory used in the sequence program storage unit 13 and the change information storage unit 12 by the circuit to be changed in the sequence program (pre-change circuit). Here, a case where the size of the circuit before change is “2” (bytes) is shown.

  The post-change circuit size indicates the memory size used in the sequence program storage unit 13 and the change information storage unit 12 by the circuit (post-change circuit) to be changed in the sequence program. Here, a case where the size of the circuit before change is “2” (bytes) is shown. In this embodiment, it is described that the LD instruction and the OUT instruction each require a memory size of 1 byte, and the size of the circuit before change and the size of the circuit after change are 2 bytes.

  The post-change circuit is a circuit after the change of the sequence program 70. Here, since the circuits stored in the address A to the address (A + 1) and the address B to the address (B + 1) are the same, the address A to the address ( A + 1) and the circuits stored at address B to address (B + 1) are changed by the same circuit “LD M1, OUT M2.” The start address indicates the start address of the circuit to be changed. Here, the start address A and the start address B of the circuit “LD M0, OUT M2” to be changed are shown.

  Here, in order to clarify the difference between the configuration of the change information in the present embodiment and the conventionally used change information, the configuration of the conventionally used change information will be described. FIG. 4B is a diagram illustrating a configuration of program change information having circuit change information for the number of changed circuits, and illustrates a configuration of program change information that has been conventionally used.

  As shown in FIG. 4B, the conventional program change information 60 includes the number of changed circuits, circuit change information 61A and 61B corresponding to the number of changed circuits, and a head address corresponding to the number of changed circuits. Here, the number of changed circuits is “2”. The first address and circuit change information 61A are included as information related to the change of the first circuit, and the start address and circuit change information 61B are included as information related to the change of the second circuit.

  The circuit change information 61A of the first circuit includes the start address (A), the pre-change circuit size (“2”), the post-change circuit size (“2”), and the post-change circuit (“LD M1, OUT M2”). Contains.

  The circuit change information 61B of the second circuit includes the start address (B), the pre-change circuit size (“2”), the post-change circuit size (“2”), and the post-change circuit (“LD M1, OUT M2”). Contains.

  Thus, the conventional program change information 60 requires circuit change information for the number of changed circuits when the same circuit is changed at a plurality of locations. On the other hand, the program change information 50 according to the present embodiment shown in FIG. 4A has one circuit change information for the same circuit when the same circuit is changed at a plurality of locations. Thereby, the information written from the sequence program editing device 20 to the programmable controller 10 can be reduced.

  When the program change information 50 from the sequence program editing device 20 is written into the change information storage unit 12 of the programmable controller 10, the arithmetic unit 11 changes the sequence program 70 of the sequence program storage unit 13 based on the program change information 50. (Step S110).

  FIG. 5 is a flowchart showing a procedure for changing the setting of the sequence program. In order to change the sequence program 70 of the sequence program storage unit 13, the arithmetic unit 11 extracts a circuit to be changed from the program change information 50 written in the change information storage unit 12. For example, when the “LD M0, OUT M2” circuit shown in FIG. 3 is changed, the “LD M0, OUT M2” circuit corresponding to the head address A and “LD M0, OUT M2” corresponding to the head address B are changed. The two circuits are extracted. Then, the circuit changing process is sequentially performed on the extracted changed circuit (the changing process is repeated). Here, description will be made assuming that the top address information referred to when performing the setting change processing of the nth (n is a natural number) circuit is the top address n. In the circuit changing process, the arithmetic unit 11 first checks whether or not all the processes for the number of changed circuits have been completed (step S200).

  If the arithmetic unit 11 determines that the processing for the number of changed circuits has not been completed, it starts the n-th setting change processing (loop processing). First, the circuit size before change is compared with the circuit size after change for the nth change circuit, and whether or not the circuit size before change is smaller than the circuit size after change (circuit size before change <circuit size after change). Judgment is made (step S210). Here, the pre-change circuit size and the post-change circuit size are extracted from the circuit change information 51 of the program change information 50 and compared.

  If the arithmetic device 11 determines that the pre-change circuit size is not smaller than the post-change circuit size (No in step S210), whether or not the pre-change circuit size is larger than the post-change circuit size (pre-change circuit size> change Next circuit size) is determined (step S220).

  When the circuit size before change and the circuit size after change are the same size (when the circuit size before change is not larger than the circuit size after change) (step S220, No), the circuit after change is extracted from the circuit change information 51, and the sequence The changed circuit is copied to the position of the start address n of the sequence program on the program storage unit 13 (step S230). Thereafter, the process of step S200 is performed in order to perform a setting change process of the next circuit.

  When the arithmetic unit 11 determines that the pre-change circuit size is larger than the post-change circuit size (step S220, Yes), the circuit of the post-change circuit is placed at the position of the start address n of the sequence program on the sequence program storage unit 13. Copy (step S240). Then, a program (from the address position of “start address n + circuit size before change” to the final position of the program on the sequence program storage unit 13 so that the next program is continuously arranged in the circuit copied in step S240 ( The entire data is moved to the address position of “start address n + changed circuit size” (step S250). In other words, the entire program from the address position of “start address n + circuit size before change” to the final position of the program is moved by “start address n + circuit size after change”.

  By moving the entire program from the address position of “start address n + circuit size before change” to the final position of the program, the start address of the circuit change information of the circuit that has not been changed is shifted. In order to correct the start address of the circuit change information of the circuit that has not been changed, the start address is corrected in order for the circuits that have not been changed (the correction process is repeated). That is, first, the arithmetic unit 11 checks whether or not all the address correction processes for the number of circuits required for the correction process have been completed (step S260). Here, description will be made assuming that the top address information referred to when performing the address correction processing of the m-th (m is a natural number) circuit is the top address m.

  When the arithmetic unit 11 determines that all the address correction processes for the number of circuits that need the correction process have not been completed, the arithmetic unit 11 starts the m-th address correction process (loop process). In the address correction process, first, the arithmetic unit 11 checks whether or not the value of the start address m is larger than the value of the start address n (start address m> start address n) (step S270).

  When the arithmetic unit 11 determines that the value of the head address m is not larger than the value of the head address n (No at Step S270), it is not necessary to correct the head address m, so the address correction process is not performed. In this case, the process of step S260 is performed in order to perform the address correction process of the start address (m + 1) of the next circuit.

  When the arithmetic unit 11 determines that the value of the start address m is larger than the value of the start address n (Yes at Step S270), the value of the start address m is corrected by the amount moved by the process of Step S250. The value of “circuit size after change−circuit size before change” is added to the value of the start address m. Then, the process of step S260 is performed in order to perform the address correction process of the start address (m + 1) of the next circuit.

  In step S260, the processing of step S270 and step S280 is repeated until the arithmetic unit 11 determines that all the address correction processes for the number of circuits necessary for the correction process have been completed (the nth circuit change information being processed). Loop from the next (n + 1) th circuit change information to the last circuit change information).

  In step S260, when the arithmetic unit 11 determines that all the address correction processes for the number of circuits necessary for the correction process have been completed, the process of step S200 is performed to perform the setting change process for the next circuit.

  When the arithmetic unit 11 determines that the pre-change circuit size is not larger than the post-change circuit size (step S210, Yes), from the address position of “start address n + pre-change circuit size” on the sequence program storage unit 13. The entire program up to the final position of the program is moved to the address position of “start address n + changed circuit size” (step S290). Then, the circuit of the changed circuit is copied to the position of the start address n of the sequence program on the sequence program storage unit 13 (step S300).

  Thereafter, the processes in steps S260 to S280 are performed. That is, the arithmetic unit 11 checks whether or not all the address correction processes for the number of circuits required for the correction process have been completed (step S260), and all the address correction processes for the number of circuits required for the correction process have been completed. If it is determined that there is no such address, an address correction process for the mth circuit is performed. In the address correction process, first, the arithmetic unit 11 checks whether or not the value of the head address m is larger than the value of the head address n (step S270).

  When the arithmetic unit 11 determines that the value of the head address m is not larger than the value of the head address n (No at Step S270), the head address m need not be corrected, and the address correction process is not performed.

  If the arithmetic unit 11 determines that the value of the head address m is larger than the value of the head address n (Yes in step S270), the value of the head address m is corrected by the amount moved by the processing in step 300. The value of “circuit size after change−circuit size before change” is added to the value of address m. Here, since the pre-change circuit size is smaller than the post-change circuit size, the value of “post-change circuit size−pre-change circuit size” is a negative value.

  Then, in step S260, the processing of step S270 and step S280 is repeated until it is determined that the arithmetic unit 11 has completed all the address correction processing for the number of circuits necessary for the correction processing.

  If the arithmetic unit 11 determines in step S260 that all the address correction processes for the number of circuits required for the correction process have been completed, the process of step S200 is performed to perform the setting change process for the next circuit.

  In step S <b> 200, the processes in steps S <b> 210 to S <b> 300 are repeated until it is determined that all the change processes have been completed for the change circuit extracted by the arithmetic device 11. In step S200, when the arithmetic unit 11 determines that all the change processes for the number of circuits required for the change process have been completed, the program setting change process ends.

  As described above, the program change information 50 includes a single circuit change information 51 for the same circuit even when the same circuit is changed at a plurality of locations. It is possible to reduce the information to be written to.

  Thus, according to the embodiment, it is possible to reduce the amount of information written from the sequence program editing device 20 to the programmable controller 10, so that the program change information 50 is sent from the sequence program editing device 20 to the change information storage unit 12. The writing time is shortened and the memory size of the change information storage unit 12 can be reduced.

  As described above, the program changing method according to the present invention is suitable for changing the sequence program of the programmable controller.

It is a figure which shows the structure of the program change system which concerns on embodiment. It is a flowchart which shows the process sequence of a change of a sequence program. It is a figure which shows an example of a sequence program. It is a figure which shows the structure of the program change information which concerns on embodiment. It is a figure which shows the structure of the program change information which has circuit change information for the number of change circuits. It is a flowchart which shows the process sequence of the setting change of a sequence program.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Programmable controller 11 Arithmetic apparatus 12 Change information storage part 13 Sequence program storage part 14 Device memory | storage part 15 I / F part for editing apparatuses 16 I / F part for device information 20 Sequence program editing apparatus 21 Program creation part 22 Change information creation part 23 Communication I / F section 30 Memory section 40 Communication means 50, 60 Program change information 51, 61A, 61B Circuit change information 70 Sequence program

Claims (4)

In the program change method of the sequence program of the programmable controller provided with a sequence program having a plurality of the same functional block circuits,
A program transmission step for transmitting program change information for changing the sequence program from an external device connected to the programmable controller;
A program storage step in which the programmable controller stores the program change information transmitted from the external device;
A program change step for changing the sequence program of the programmable controller based on the stored program change information;
Including
The program change method includes information on a function block circuit to be changed and information on a plurality of addresses for storing the function block circuit to be changed in the sequence program.   The program change method according to claim 1, wherein the program change information further includes information on a size of the functional block circuit before the change and a size of the functional block circuit after the change. In a programmable controller that executes a sequence program having a plurality of the same functional block circuits,
An information receiving unit for receiving program change information for changing the sequence program from an external device that edits the sequence program;
A program storage unit for storing the program change information received from the external device;
A program change unit for changing the sequence program based on the stored program change information;
With
The program change information includes information on a function block circuit to be changed and information on a plurality of addresses storing the function block circuit to be changed in the sequence program. In a program editing device for editing a sequence program executed by a programmable controller,
A change information creating unit that creates information for changing the sequence program of the programmable controller as program change information,
The sequence program has a plurality of the same function block circuits, and the program change information includes information on the function block circuits to be changed and information on a plurality of addresses storing the function block circuits to be changed in the sequence program. A program editing apparatus comprising:

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