JPH0233653A - Programmable controller - Google Patents

Abstract

PURPOSE:To improve the memory efficiency by using the module back-up information, an executing order back-up table, a switching request monitor part, an allocation processing part, and a shared memory to form a programmable controller. CONSTITUTION:One of program modules of a certain program module group is replaced with another program module having a different algorithm. In such a case, the program module groups are not registered independently of each other and the modules set at the common part of a certain program module group are kept as they area. Then only the program modules having different algorithms are replaced. In this respect, a programmable controller consists of a control part 2, a shared memory 6, an input/output processing part 7, and the arithmetic control parts 3-1 to 3-n. Thus, it is possible to delete the undesired modules and to add the desired modules without deteriorating the processing ability of an arithmetic control part. An a result, the memory effi ciency is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multiprocessor type programmable control device.

[Conventional technology]

Figure 7 shows, for example, an 11-fault tolerant computer P171~P2O2'' (Nikkei Electronics
1 is a block diagram schematically illustrating the configuration of a conventional multiprocessor-type programmable control device, such as that disclosed in 1983.5.9 issue).

In the figure, 1 is a maintenance tool for creating or maintaining programs, 2 is a management unit for managing the execution of program modules for the entire system, 3-1 to 3-N are calculation control units, and 4-1 to 4- N is the local memory of each arithmetic control unit 3-1 to 3-N, 5 is management information in the management unit 2 of the program module executed by each arithmetic control unit 3-1 to 3-N, and 6 is the system Overall shared memory, 7 is the input/output device section (hereinafter referred to as 170 sections)
, 8 is a system bus. Here, each calculation control unit 3-1
The local memories 4-1 to 4-N of ~3-N store program modules in which the control program is divided into a plurality of functional units.

Next, the operation will be explained. The management unit 2 divides the program modules created by the maintenance tool 1 into functional units into groups of program modules to be executed by the calculation control units 3-1 to 3-N.
The program module and data information are written into the -N ports and the -cal memories 4-1 to 4-H. In the arithmetic control units 3-1 to 3-N, data required at the start of execution is read from the shared memory 6 or from another memory via the I10 unit 7, and sequential operations are performed using the stored program modules. is executed, and the resulting data is written into a predetermined memory or the like via the shared memory 6 or the I10 unit 7 at the same time as the program module is completed.

[Problem to be solved by the invention]

Since the conventional programmable control device is configured as described above, all program modules must reside in each arithmetic control unit 3-1 to 3-N. Even if a part of the program module is changed and there is another program module group that will not be executed simultaneously, each program module group must be registered separately and independently in the arithmetic control units 3-1 to 3-N. In addition, all program module groups must be stored in the arithmetic control units 3-1 to 3-N, and backup information for each program module and each management information for its execution must also be stored in the management unit 2. It is necessary to have
Therefore, the common parts overlap, and as a result, the arithmetic control unit 3-
There was a problem in that the memory efficiency of 1 to 3-N and the management section 2 was significantly reduced.

This invention was made in order to solve the above-mentioned problems. For example, when it is desired to replace some program modules of a certain program module group with program modules of a different algorithm by external input, each program module group without registering them separately and independently.
By making it possible to execute a group of program modules in which the common program modules of a group of program modules remain unchanged, and only the program modules with different algorithms are replaced, the processing capacity of the arithmetic control section is not reduced. The present invention also aims to provide a programmable control device with improved memory efficiency of a management section.

[Means to solve the problem]

In the programmable control device according to the present invention, a management means for managing programs such as the program modules of a plurality of arithmetic control units each storing a program module obtained by dividing a control program into a plurality of functional units manages the program module. Management information, module backup information of the program module, an execution order pattern table indicating the execution order of the program module, a switching request monitoring unit that monitors the switching timing of input/output device units, etc., in response to requests from this switching request monitoring unit. The apparatus includes a placement processing section that deletes unnecessary program modules and places necessary program modules.

[Effect]

In the case where it is desired to exchange some program modules of a certain program module group with a program module with a different algorithm using the execution order pattern table, placement processing section, and switching request monitoring section of the management means of the present invention, 1. For example, the management means may leave a program module of a common part in response to a request from an external input.

Additionally, unnecessary program modules are deleted, and necessary program modules are arranged and executed.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a programmable control device of this embodiment, in which the same or equivalent parts as in FIG. 7 showing the prior art mentioned above are given the same reference numerals. That is, the basic configuration is the same as that in FIG. In FIG. 2, which provides a detailed explanation of the management section 2 in FIG.
g module backup information, 1o is the calculation control unit 3-1 to 3 set by the maintenance tool 1.
- An execution order pattern table showing an execution order pattern of program modules arranged in N.

11 is a switching request monitoring section that monitors the switching timing of the I10 section 7; 12 is a placement processing section that deletes unnecessary program modules and arranges necessary program modules at the request of the switching request monitoring section 11.

FIG. 3 shows a general configuration example of the program module group, and FIG. 4 shows a detailed explanation of the execution order pattern table 10 in FIG. 2, and an execution order pattern table in the general configuration example shown in FIG. A specific example of the state is shown.

Further, FIG. 5 explains in detail the shared memory 6 in FIG. 1, and in FIG.
This is arrangement information indicating the execution order pattern number of each program module group registered by , and 14 in FIG. 6, which describes the I10 part 7 in FIG.
This is a switching request port when specifying an execution order pattern number from the outside, and the switching request monitoring section 11 monitors this switching request port 14.

Next, the operation of such a programmable control device will be explained. Since the normal basic operation is the same as that of the prior art, it will be omitted here. The number of arithmetic control units 3-1 to 3-N connected to the system is arbitrary, but to simplify the explanation, we will now consider a case where there are two units (N=2).

However, now we have program modules A, B, C, D, and E (hereinafter referred to as A, B, and C) shown in Figure 3.

D, E) is sometimes called A according to pattern #1-1.
, B, C, D in order, and sometimes pattern #2-
When there is a program module group with an execution order pattern such that A, B, and E are executed in the order according to 1,
As shown in FIG. 4, the execution order pattern table 10 includes a set of multiple execution order patterns for program module groups, the number of pattern sets K (that is, the number of program module groups), and the number of execution order patterns in each pattern set. L, the number M of program modules in each execution order pattern, and information on each program module name (or number, identification code, etc.).

Now, in the initial state, if there is no particular designation, pattern #1-1, for example, is selected as the initial setting, and patterns A and B are selected.

C and D are local memories 4 of the calculation control units 3-1 and 3-2.
-1 to 4-2 are placed and activated.

In this state, as shown in FIG. 6(b), for the switching request port 14 of 1/circle section 7, the port 1 of execution order pattern set 1 is
When execution order pattern #2-1 is set in 4-1,
Switching request monitoring unit 11 that monitored switching request port 14
recognizes that the execution order pattern is designated as #2-1, and passes the request pattern number (ie, #2-1) to the placement processing unit 12. In response, the placement processing unit 12 compares the requested execution order pattern #2-1 with the execution order pattern #1-1 pointed to by the placement information, and selects the execution order pattern #2-1 that is in pattern #1-1. After deleting unnecessary C1 and D that are not present in pattern -1), A, B, and E are executed in the configuration shown in FIG. 3 #2-1. Similarly, when #1-1 is set for the switching request port 14, E is deleted, C, J) are placed, A, B, C.

D is executed. In this way, it becomes possible to exchange and execute some program modules of the program module group.

In the above embodiment, the module backup information 9 and the management information 5 are stored in the management unit 2 as the management means, but they may also be stored in the shared memory 6. In addition, although the arrangement information 13 is kept on the shared memory 6,
It may also be provided to the management section 2. Furthermore, the switching request monitoring section 11 has been monitoring the switching request boat 14 of the I10 section 7, but the switching request monitoring section 11 is configured to have the switching request boat 14 in the shared memory 6 and to monitor the shared memory 6. You can.

〔Effect of the invention〕

As described above, according to the present invention, the programmable control device includes module backup information, an execution order pattern table, a switching request monitoring section, and a placement processing section in the management means, and placement information in the shared memory. With this, if you want to change the execution order of a part of a group of program modules, you can leave the common program modules and delete unnecessary program modules.

Furthermore, since the configuration is configured so that necessary program modules are added, arranged, and started, there is no need to have duplicate program modules for common parts in the calculation control unit, and management information for each program module and its execution is not required. There is also no need to duplicate common information in the management section, and the memory efficiency of the arithmetic control section and management section can be greatly improved without reducing the processing capacity of the arithmetic control section. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a programmable control device according to an embodiment of the present invention, FIG. 2 is a block diagram showing the internal configuration of the management section 2, FIG. 3 is a configuration diagram of a program module group, and FIG. 4 is an execution order. A specific configuration diagram of the pattern table 10, FIG. 5 is a configuration diagram showing the arrangement information of the shared memory 6, FIG. 6 is a configuration diagram showing the switching request board of the I10 section 7, and FIG. 7 is a configuration diagram of the conventional programmable control device. FIG. 2 is a block diagram showing the configuration of FIG. 2 is a management unit (management means), 3-1 to 3-N are arithmetic control units, 5 is management information, 6 is a shared memory (management means), and 7 is an I
10 parts (input/output processing part), 9 is module backup information, 10 is an execution order pattern table, 11 is a switching request monitoring part, and 12 is a placement processing part. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. No. 3 rjlJ Fig. 4 Patent applicant Mitsubishi Electric Corporation 7 no l-

Claims (1)

[Claims] In the programmable control device, the programmable control device includes a plurality of arithmetic control units storing program modules in which a control program is divided into a plurality of functional units, and a management means for managing programs such as the program modules, wherein the management means is configured to control the program modules. Management information for managing the execution of the program module, module backup information stored in advance for the program module, an execution order pattern table indicating an execution order pattern in which the program modules are combined, a switching request for monitoring the switching timing of input/output device units, etc. a monitoring section; a placement processing section for erasing the unnecessary program module and arranging the necessary program module in response to a request from the switching request monitoring section;
During the execution of a program module group consisting of the plurality of program modules mentioned above, when executing another program module group whose execution order is only partially changed and which is not executed at the same time as this program module group, each program module By deleting only unnecessary program modules and arranging and activating only the necessary program modules without registering the groups separately and independently, it is possible to eliminate the need to redundantly place program modules of common parts in the above-mentioned arithmetic control section. A programmable control device characterized in that the program module group is executed by eliminating the need to have redundant backup information for each program module and management information for its execution with respect to the common portion information.