JPH03216703A - Collation method for sequence program - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for collating sequence programs that allows only different parts of sequence programs to be collated accurately.

(Problem to be solved by the prior art and the invention) When programming, adjusting, or changing device specifications, it is necessary to search any location in the sequence program.
At that time, the sequence program stored in the memory device is compared with the sequence program stored in the programmable controller. This matching is
One sequence block at a time is sequentially executed from the beginning of both sequence programs.

However, in verification using such a method, if there is a mismatch in even some of the verified blocks, the entire block is considered to have been changed. Therefore, it is not easy to find only the truly changed parts by checking. For example, even if a sequence program performs essentially the same process simply by changing the order of the sequence program, the parts of this block after that part will be considered to have been changed. . If the range that is considered to have been changed is wide, it becomes necessary to manually search for the truly changed part, which impedes rapid modification of the sequence program.

The present invention was made to solve these conventional problems, and an object of the present invention is to provide a method for collating sequence programs that allows only the different portions of sequence programs to be accurately searched.

(Means for Solving the Problems) To achieve the above object, the present invention provides a method for comparing a sequence program stored in a programmable controller with a sequence program stored in a memory device. Based on the sequence program stored in both the controller and the memory device, a data table regarding whether or not each output coil is used is created, and based on the data table, whether or not each output coil is used is determined. The present invention is characterized in that the sequence program stored in the programmable controller and the sequence program stored in the memory device are verified by comparing the sequence programs stored in the programmable controller and the sequence program stored in the memory device.

(Function) According to such a matching method, matching of the sequence program is performed based on the output coils stored in both the programmable controller and the memory device, so that only changed portions of the sequence program can be reliably searched. I can do it.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a schematic configuration diagram of a programmable controller that implements the verification method of the present invention, FIG. 2 is a flowchart showing the verification method of the present invention, and FIGS. 3 and 4 are flowcharts shown in FIG. 2. FIG. 2 is a conceptual diagram of the operation of FIG.

FIG. 1 is a schematic configuration diagram of a programmable controller. The CPU has RAM2, ROM3, CRT4,
A human output device 5 is connected. , RAM 2 stores contact information and various detected values input from the human output device 5, as well as CP
Calculated values of the UI, etc. are temporarily stored. Further, the ROM 3 stores a sequence program executed by this programmable controller. CRT4 has CP
The calculation results by U1 and the above-mentioned various information input manually from the input/output device 5 are displayed. Furthermore, when changing the sequence program, the sequence program is displayed. The input/output device 5 inputs information from various sensors and limit switches attached to the driven body, and outputs instructions calculated by the CPU to the driven body.

Verification of sequence programs is performed by the programmable controller configured as described above as shown in the flowchart shown in FIG.

First, when checking a sequence program, the sequence program is input from an external memory device via the input/output device 5, and this sequence program is stored in the RAM.
Temporarily stored in 2. Next, from the sequence program stored in the ROMB and the sequence program stored in the RAM2, only information regarding the output coil is collected and a data table regarding the output coil is created.
The data table is stored in RAM2. This concept is shown in FIG. That is, one data table A is created by collecting only information regarding the output coil from the sequence programs stored in the programmable controller. Similarly, one data table B is created for the memory device (step 10).

Next, both data tables A and B are compared.

This comparison is performed for each output coil, and its concept is as shown in FIG. 4 (step 11). In this comparison, the data for a certain output coil is shown in data table A.
and data table B are both 1 (A=1.8=1). That is, when it exists in both data tables (step 12), the sequence program is compared one instruction at a time from the beginning of the block that activates this output coil (step 13). This comparison continues until all instructions for that output coil have been completed (step 14.15). If an instruction that does not match is found during this comparison, it means that the sequence program for that output coil has been changed, so the changed portion is displayed on the CRT 4 (step 16). On the other hand, in the comparison in step 12, A=1, B=0
If so, since the output coil that existed in the programmable controller does not exist in the memory device, it is determined that the sequence program has been deleted. Also, if A = O, B = 1, the output coil that did not exist in the block'rammable controller exists in the memory device, so it is determined that it is an added sequence program. do. Further, when both data tables are 0 (A=0, B=0), it is determined that there is no change (step 17).

In this way, according to the matching method of the present invention, only changed portions of sequence blocks can be easily searched.

(Effects of the Invention) As is clear from the above explanation, according to the sequence program matching method according to the present invention, a changed part is searched based on the information of the output coil of the sequence program. It is possible to reliably search only the changed parts.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a programmable controller that implements the verification method of the present invention, FIG. 2 is a flowchart showing the verification method of the present invention, and FIGS. 3 and 4 are flowcharts shown in FIG. 2. FIG. 2 is a conceptual diagram of the operation of FIG.

Claims (1)

[Claims] A method of collating a sequence program stored in a programmable controller and a sequence program stored in a memory device, comprising: a sequence program stored in both the programmable controller and the memory device. Based on this, a data table is created for each output coil regarding whether or not it is used, and the sequence program stored in the programmable controller is created by comparing whether or not each output coil is used based on the data table. 1. A method for comparing a sequence program, the method comprising: comparing a sequence program stored in a memory device with a sequence program stored in a memory device.