JPH025101A - programmable controller system - Google Patents

Abstract

PURPOSE:To easily control and maintain a ladder program by storing the comments of a network constituting a ladder program in a comment memory and controlling the addition or deletion of the comments correspondingly to the addition or deletion of the network. CONSTITUTION:The title system is constituted of a programming device 1, a communication interface module 2 and a programmable controller (PC) 5 and the PC 5 is constituted of a CPU module 3 and a comment memory module 4. Comments of the network constituting the ladder program 20 are stored in the comment memory 13 and the comments are added or deleted in accordance with the addition or deleteion of the network. Consequently, the allocation of comments to the network can be attained, the edition processing of the comment memory 13 can be executed even in the operation of a sequencer and the control and maintenance of the ladder program can be easily executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a management and maintenance method for a ladder program used in a programmable controller (hereinafter abbreviated as PC).

[Conventional technology]

FIG. 5 is a block diagram showing the configuration of a conventional example of a PC system. The CPU module 33 communicates with the programming device 31 via the communication interface module 32, and decodes and processes the ladder program 20, as well as comments on each coil of the ladder program 20 (such as the function of the ladder circuit, processing content, etc.). Annotations inserted into the ladder program for ease of use are managed.

In this case, comments can only be added to the coils used in the ladder program 20, and since the number of coils that can be used is limited, the comment area (memory area that stores comments) also has the same number of coils. As shown in FIG. 6, the coil 34 and the comment have a one-to-one correspondence by fixing the address of the comment area in correspondence with the coil. Therefore, even if a new ladder circuit is added or removed by, for example, changing the ladder program during operation, each coil 34, . 342. ..., 3
Comment area 35.4n on comment memory 35 corresponds to comment area 35.4n. ．． 35. .

..., 35n was secured.

Conventionally, as shown in FIG. 7, the ladder program 20 is divided into several units of ladder networks (hereinafter referred to as networks) 20.
．． The ladder program was divided into 2, 0□, . . . to facilitate management and maintenance of the ladder program. However, the networks 201, 202 . No comments were made on...

[Problems to be Solved by the Invention] The conventional PC system described above has the disadvantage that it is inconvenient to monitor the control flow on a CRT while the sequencer is operating because it does not have a means to add comments to the network. There is.

Therefore, there is an increasing need to add comments to each network. However, in a ladder program composed of such networks, the number of networks changes depending on the length of the program, and it is possible to add or delete programs on a network-by-network basis. As in the case of , it is impossible to add comments to a network using a method in which the address of the network comment area is fixed in correspondence with the network.

An object of the present invention is to provide a programmable controller system that can add comments to networks, add and delete comment areas in response to additions and deletions of networks, and independently manage comments. It's about doing.

[Means to solve the problem]

The programmable controller system of the present invention includes a ladder program divided into desired ladder network units, a comment regarding the unit that is output every time a ladder network unit is output, and an instruction to delete the ladder network and the corresponding comment. a first logic decoder that decodes and processes the transmitted ladder program and comments, a ladder program memory that stores information corresponding to the ladder program, and a first logic decoder that outputs the decoded comments. CP with 1 interface
a U module, a second interface for receiving the comments from the CPU module, a common memory for holding the comments transmitted via the second interface, and a second interface for decoding and processing the comments held in the common memory. a logic decoder, a comment memory module having a comment memory for storing comments decoded by the second logic decoder; a new area for storing information to be stored in the ladder program memory, a comment regarding the unit is output to the comment memory module via the first interface, and a second logic decoder inputs the comment. Then, an area for storing the comment is set and stored in the comment memory, and when a signal instructing to delete an arbitrary ladder network unit and comment is input, the first logic decoder section decodes the corresponding comment. The information corresponding to the unit is deleted from the ladder program memory, and the signal is output to the comment memory module via the first interface, and the second logic decoder inputs the signal and reads the indicated comment. a programmable controller for removing the programmable controller; and a communication interface module for interfacing communication between the programming device and the programmable controller.

[For production]

In this way, it is possible to add comments to networks by storing comments for networks that make up a ladder program in the comment memory and controlling the addition or deletion of the comments in response to the addition or deletion of networks. Editing of the comment memory can be performed even while the sequencer is operating, thereby facilitating the management and maintenance of the ladder program.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the programmable controller system of the present invention.

The programmable controller system of this embodiment includes a programming device 1 and a communication interface module 2.
and PO2.

The programming device 1 outputs a ladder program decomposed into network units, comments regarding the networks of each unit, and other data. In this embodiment, the CRT1 is conveniently used for managing the ladder program.
The sequence ladder group displayed on one screen of 6 is the unit of the network, and the ladder program is divided into these units. Therefore, the network comment is displayed on the same screen of the CRT 16 as the network.

Communication interface module 2 interfaces remote communication between programming device 1 and PO2.

PO2 is composed of a CPU module 3 and a comment memory module 4. The CPU module 3 is an upper-level calculation unit of PO2, and includes a CPU 6, ROM 7, ladder program memory 8, bus interface 9, and input/output device 10.
It consists of CPU6 is programming device 1,
It processes data through communication with the comment memory module 4, and decodes and processes the ladder program and comments transmitted from the programming device 1. ROM7
stores the arithmetic processing procedure (control program) of the CPU 6. Ladder program memory 8 stores the ladder program decoded by CPU 6. The bus interface 9 interfaces data transmission between the CPU module 3 and the comment memory module 4, and outputs comments decoded by the CPU 6 onto the common bus. The input/output device 10 interfaces data input/output between the CPU module 3 and external devices.

Comment memory module 4 has CPUI 1, ROM 1
2, a comment memory 13, a common memory 15, and a bus interface 14. The bus interface 14 interfaces data transmission between the CPU module 3 and the comment memory module 4, inputs comments output on the common bus, and transmits them to the common memory 15. Common memory 15 is CPU6 and CPUII
It holds the data sent and received between the two via the common path.

Comment memory 13 stores comments transmitted from common memory 15. The CPU II communicates with the CPU module 3, processes data, and manages the comment memory 13. The ROM 12 stores CPU II arithmetic processing procedures.

Next, the operation of this embodiment will be explained.

The programming device 1 outputs a ladder program, and each time it outputs a unit network constituting the ladder program, it outputs a comment regarding the network. When the CPU module 3 inputs the ladder program and network comments via the communication interface module 2, the CPU 6 decodes them, stores the ladder program in the ladder program memory 8, and stores the comments via the bus interface 9 in the comment memory module. 4. Comments transmitted to the bus interface 14 are held in the common memory 15 and sent to the CPU
It is stored in the comment memory 13 under the control of II.

Next, the operation of this embodiment when adding or deleting a new network will be explained with reference to FIGS. 2, 3, and 4.

Figures 2 and 3 are diagrams showing the correspondence between networks and comment memory areas when unit networks are added or deleted, respectively, and Figure 4 is a diagram showing an example of networks and comments displayed on the CRTl6. be.

The ladder program 20 includes networks 20+, 20
2.203,..., and each network is C
Displayed on the RTl6 screen. Also, network 20
The comment memory 13 has comment areas 131, 132, 133, . . , corresponding to +, 202, 203, .
... is set. Each comment area 13
．． ．． The network comments stored in 132, 133, . . . are displayed on the screen of the CRT 16 together with the corresponding networks, as shown in FIG.

Now, network 20. When the network 20X is inserted between the network 20x and the comment 13x corresponding to the network 202, when the CPU module 3 receives the network 20x and the comment 13x corresponding to the network, the CPU 5 stores the program corresponding to the network 20x in the corresponding address of the ladder program memory 8. At the same time, the comment 13X is transmitted to the comment memory module 4. In the comment memory module 4, the comment 13x is stored in the corresponding address of the comment memory 13 under the control of the CPU II.

Therefore, the already stored network 202
．． Program and comment 1 corresponding to 203...
32133, . . . are re-stored with sequentially shifted addresses.

When a signal instructing deletion of the network 202 is transmitted to the CPU module 3, the CPU 6 decodes this signal and deletes the corresponding program in the ladder program memory 8, as well as a signal instructing deletion of the corresponding comment 13□. is sent to the comment memory module 4. C.P.
When the UII receives this signal, it writes comments 133, 134 . The comments 132 are deleted by sequentially shifting the addresses of .

Note that the comments for each file are processed by the CPU module 3 and displayed on the CRT 16 as in the conventional case.

[Effects of the Invention] As explained above, the present invention stores comments of networks constituting a ladder program in a comment memory, and controls addition or deletion of the comments in response to addition or deletion of networks. This makes it possible to add comments to the network and edit the comment memory even while the sequencer is in operation, which has the effect of facilitating the management and maintenance of the ladder program.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the programmable controller system of the present invention, and FIGS. 2 and 3 are diagrams showing the correspondence between networks and comment memory areas when unit networks are added or deleted, respectively. FIG. 4 is a diagram showing an example of the network and comments displayed on the CRTl 6, FIG. 5 is a block diagram showing the configuration of a conventional example of a programmable controller system, and FIG. 6 is a diagram showing the correspondence between coils and comments. FIG. 7 is a schematic diagram showing that the ladder program is divided into ladder network units. 1... Programming device, 2...
...Communication interface module, 3...
...CPU module, 4...Comment memory module, 5...PCl 611...CPU, 7.12...・ROM. 8...Ladder program memory, 9.1
4...Bus interface, lO...
...Common memory, 13...Comment memory, 16...CRT, 20...Ladder program. RT

Claims (1)

[Scope of Claims] A ladder program divided into desired ladder network units, a comment regarding the unit that is output every time a ladder network unit is output, and a signal instructing deletion of the ladder network and the corresponding comment. a first logic decoder that decodes and processes the transmitted ladder program and comments, a ladder program memory that stores information corresponding to the ladder program, and a first logic decoder that outputs the decoded comments. CP with an interface
a U module, a second interface for receiving the comments from the CPU module, a common memory for holding the comments transmitted via the second interface, and a second interface for decoding and processing the comments held in the common memory. a logic decoder, a comment memory module having a comment memory for storing comments decoded by the second logic decoder; a new area for storing information to be stored in the ladder program memory, a comment regarding the unit is output to the comment memory module via the first interface, and a second logic decoder inputs the comment. Then, an area for storing the comment is set and stored in the comment memory, and when a signal instructing to delete an arbitrary ladder network unit and comment is input, the first logic decoder section decodes the corresponding comment. the information corresponding to the unit is deleted from the ladder program memory, and the signal is output to the comment memory module via the first interface, and the second logic decoder inputs the signal and reads the indicated comment. A programmable controller system comprising: a programmable controller to be deleted; and a communication interface module for interfacing communication between the programming device and the programmable controller.