JPH01112403A - Programmable controller - Google Patents

Abstract

PURPOSE:To shorten a debugging time by storing status information changed in accordance with the change of an input command. CONSTITUTION:A program is written to a CPU 2 and during the execution, an input command is successively given by a key input from a peripheral device 1 to the CPU 2. At this time, each time an input condition is changed, all parts and a part of the status are stored into a memory 2b for storing an internal status. When the debugging is discovered at a sequence program, the input command is interrupted and the program is corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blockable controller.

[Conventional technology]

Figure 2 is a block diagram showing, for example, the control system of a conventional programmable controller. (2) is a CPU that controls input/output according to the sequence block diagram; (2a) is a calculation unit that forms part of CPU (2); , (3) is I1 that actually turns on and off the controlled object according to input/output commands from the CPU (2).
0 unit, 1-1(4) is I1022, -, )-(3
) is the controlled object.

Next, let's explain the operation.1 Normally, when you create a sequence block program for the first time, you can correct any bugs in the block program.
(Deva-ri is performed in order to
0 unit... There are cases in which the controlled object (4) is connected to (3) and cases in which it is not connected, but suddenly C! Even if PTJ (2) is operated, it is not possible to determine which part of the program is bad. Therefore, by cutting off the input signal from I1022-G (3), putting the CPU (2) in the running state, and manually inputting the input signal from the peripheral fM (1), the outputs can be sequentially output. The state of the X4 element (4) is determined based on the state of the LED indicating the output state of the I10, etc., and the program is debugged. If a bug is found, the program is modified and the above method of sequentially giving input commands from the beginning is repeated until the bug is eliminated.

[Problem that the invention seeks to solve]

Conventional programmable controllers are configured as described above, so every time you modify a part of the program when debugging a program, you have to re-give the input commands in order from the beginning to the point where the debugging ended. must,
Furthermore, as the object to be controlled (4) becomes larger and the size of the sequence program also becomes larger, there is a problem in that this work takes a lot of time.

This invention was made to solve the above-mentioned problems, and it eliminates the loss of having to reassign key personnel from the beginning even when a block is modified when depacking a program. The purpose is to reduce the time required for programming.

In addition to the above-mentioned object, another object of the present invention is to eliminate errors in inputting commands when re-applying human power to keys.

[Means for solving problems]

The programmable controller according to the present invention is configured to store all or part of the status information of internal output contacts 8, internal contacts, timers, etc. that changes due to changes in input commands during execution of a sequence program.

[Operation 21] In the present invention, the status storage memory stores status information that has changed due to changes in input commands.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, the same reference numerals as in FIG. 2, which shows the conventional example, indicate the same parts, so a description thereof will be omitted. In the figure, (2
h) is a status storage memory that exchanges data with the arithmetic unit (2a) inside the CPU (21). Next, the operation will be explained. The controlled object (4) is connected to You don't have to do it.Also, v!
=, cut off the input signal from g (3) Next, cpu
A program is written in (2) and executed, and input commands are sequentially given to the CPU (2) from the peripheral device (1) manually using keys. At this time, the CPU (2) stores all or part of the status in the internally provided status storage memory (21) every time the input status changes. Assuming that each input command advances the number of steps, the larger the memory capacity is, the more steps the program will store from the last step.
I can memorize many Ste Libs. If a bug is discovered in the sequence program during the process, stop giving input commands and correct the program. When the modification is completed, the sequence block is executed again, but whether to incise the status or to execute from the same stored status is determined by mode switching. The mode switching method is not relevant here, and if you want to start execution from the steps before the final step, press the specified key manually from peripheral B (1). It is possible to start with a quick steno knob within the range you have memorized.

'tkr+m When target (4) is connected,
It is a good idea to advance the machine's operation to that stage in advance so that it corresponds to the starting stage I (ζ).

In the above embodiment, the storage location of the status is CP.
Although it is inside the UQ23, it goes without saying that it will not make any difference if it is included in other tiles such as the peripheral ff1 (1).

[Threat of invention]

As described above, according to the present invention, since a status storage memory is provided for storing status information of the CPH, it is possible to avoid the trouble of re-supplying the same input command several times each time the program is modified. In addition to being able to significantly shorten the processing time, there is no need to give incorrect input fingers, and it is said that the debugging effect is improved, such as being able to debug/rig only a part of the steps in the middle. effective.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a control system showing a programmable controller according to an embodiment of the present invention, and FIG. 2 is a block diagram of a control system showing a conventional programmable controller. In the figure, (2b) is a status storage memory. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] It is characterized by comprising a status storage memory that executes a sequence program created in advance, stores CPU status information that changes every time an input command is given from the outside, and outputs the status information to the CPU in accordance with a predetermined input command. A programmable controller.