JPS63293604A - Sequence table type controller - Google Patents

Abstract

PURPOSE:To improve the productivity and the quality of a program with a sequence table type controller by having the output of the state of a device designated as an interlock and the AND arithmetic result as the operation output signals. CONSTITUTION:The interlock conditions C are given to an output signal name and a process number B. In this example, the ON signal of an FIC103 and the OFF signal of a DI12 are applied to an output signal TIC101 and PL1 as the interlock signals respectively. Therefore the signal TIC101 is outputted only when the ON signal of the FIC103 exists; while the signal PL1 is outputted only when the OFF signal of the DI12 exists. Thus it is possible to obtain simple a sequence control function without deteriorating the program productivity and quality just by setting an equipment number and its state related to an interlock function.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a table that divides a predetermined process into a plurality of steps and defines the state of the operation output for each step, and a table that defines the state of the operation output for each step, and the transition conditions for each step of the process. The present invention relates to a sequence table type control device that performs a series of controls based on the following.

[Conventional technology]

Conventionally, such a sequence table type control device uses a so-called sequence table, which allocates a process to each different output state of the operation target and defines the operation output state for each process, as shown in Fig. 4, for example. Generally, the program is carried out using

That is, in the figure, A indicates the output signal name corresponding to the device to be operated, and the output status of each is indicated by diagonal lines (
For example, on state), or not (for example, off state 11!li
It is shown by . Further, B indicates a process, which can essentially be considered as a time axis.

Therefore, for example, the output TICi D 1 is the step 1°2
．． It can be seen that the output is on in steps 6 and 5, and off in step 4, and similarly, it is found that the output PL1 is on in step 4.5 and off in steps 1 and 2.3.

[Problem that the invention seeks to solve]

However, in such a sequence table, depending on the device to be operated, the main state may be ON (ON).
), it may be necessary to turn the device ON or OFF in conjunction with the status of other devices related to it, which means that the target process is actually only one step. However, if two or more apparent processes are made safe, and the transition conditions between processes are made safe for each of these apparent processes, the productivity of the program will not only decrease, but also the target process Since the process and the process on the sequence table do not match, problems arise such as poor understanding due to poor understanding.

Therefore, this invention can match the steps of the target process with the steps on the sequence table,
Another object of the present invention is to provide a sequence control device that can improve the productivity and quality of programs.

[Means for solving problems]

Interlock conditions can be assigned to each operation output point,
When outputting, the final operation output is determined by referring to whether or not the interlock condition is given.

[Effect]

Interlock conditions can be assigned to each operation output of the sequence table, and even if the operation output corresponding to the process of the sequence table is ON, the operation output signal is the result of performing a logical product operation with the state of the device specified for interlock. By outputting as , it is possible to match the steps in the target process with the steps in the sequence table, and to enable interlocking with the equipment specified for interlock.

〔Example〕

FIG. 1 is an explanatory diagram for explaining the invention in detail, and FIG.
The figure is a ladder diagram showing the logical relationship between interlock signals and operation outputs, and FIG. 3 is a time chart showing the relationship between outputs corresponding to processes in the sequence table of FIG. 1, interlock signals, and final output results.

As is clear from FIG. 1, the feature is that an interlock condition C is further added to the output signal master and process number B, and in -, the output signal TIC101 and PL
For l, ON signal of FIC103 and OFF of D112
An example is shown in which each signal is provided as an interlock signal. Therefore, logically, as shown in FIG. 2, output signal TIC101 is output only when there is an ON signal of FIC103, and output signal PL1 is output from
Output only when F signal is present. As a result, Figure 6 (
For outputs 1 and 4 such as (a) and (e), (b) respectively.
Since interlock signals such as , and (f) are provided, the final output results are as shown in (c) and (g), respectively. In addition to this, the process numbers 1 to 5 are also 1-5, as in (d).
1.1-2, 2-1, 2-2, 3-1, 3-2
, 4-1.

The process steps are divided into 4-2, 4-3, 5-1, 5-2, and 5-3, allowing the process steps to match the steps on the sequence table.

In this way, the productivity of the p1 program can be increased by setting the device number and its status related to the interlock function.
It becomes possible to easily construct a sequence control function without compromising quality. In addition, in the above, ON or OF
Although we have explained the case of controlling the F state, for example, when controlling a speed-type device such as an electric valve, the valve position switch is set as an interlock signal and an opening command is issued.

By using two sets of operation outputs for the close command, positioning control functions, etc. can be realized.

〔Effect of the invention〕

According to this invention, both the advantages of ease of creating and understanding sequence table type programs and the advantage of being able to handle two shifts of ON and OFF of a single ladder type with a single signal are achieved in one system. It can be used by simply assigning signals, therefore, it is possible to build sequence control functions with high productivity and quality, and in a manner that matches the target process steps. What benefits can be brought about?

[Brief explanation of drawings]

Figure 1 is an explanatory diagram for detailed explanation of this invention, 8g
Figure 2 is a ladder diagram showing the logical relationship between interlock signals and operation outputs, and Figure 6 is a time chart showing the relationship between outputs corresponding to processes, interlock signals, and final output results in the Jiken Stable in Figure 1. , FIG. 4 is an explanatory diagram for explaining a conventional example of a sequence table. Code explanation A, TlC101, PLl... Output signal, B.
...Process number, C, FIC103, DIi2...
...Interlock signal. Agent Patent Attorney Akio Namiki Agent Patent Attorney Kiyoshi Matsuzaki Figure 2

Claims (1)

[Claims] In a sequence table control device that divides a given process into multiple steps and performs a series of controls based on a table that defines the state of the manipulated output for each step and transition conditions for each step of the process, 1. A sequence table type control device, characterized in that an interlock condition can be given to the control device, and when outputting, the final operation output is determined by referring to whether or not the interlock condition is given.