JPS63131202A - Sequence controller - Google Patents

Abstract

PURPOSE:To raise the generality of a controller by varying an input signal and an action signal by means of the specification of a variable condition registration part. CONSTITUTION:A sequence controller 10 is constituted with an input circuit part 11 connected to the respective final control elements of a controlled system 20, a control part 13 constituted with a CPU as a central part and a storage part 15. And a condition input device 30 is connected to the control part 13. The above-mentioned storage part 15 provides a condition signal registration part 15a where the input signal from the controlled system 20 is registered, an action signal registration part 15b where the condition of output is registered, an input condition registration part 15c where the condition of sequential transition is previously registered every step and an action output registration part 15d and also provides the variable condition registration part 15e where the respective variable conditions of the input signals and the output signals are registered. Since the input signal and the output signals can be variably treated, the controller becomes extremely convenient in such a case as the signals of the same pattern are repeatedly treated, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a sequence control device using a decision table, and particularly to a highly versatile sequence control device.

(Prior art) A conventional general decision table is provided in the memory device of a metering machine, and is divided into four parts, top, bottom, left and right, as shown in Figure 3.The upper left section is a conditional message @ column. 1, and the input signal from the controlled object that becomes the sequence transition condition is specified.The lower left is the operation signal column 3, and the output signal to be given to the controlled object is specified.The upper right is input condition specification 1II.
I15, and information serving as a sequence transition condition corresponding to the input signal in the condition signal column 1 is written in advance.

The lower right part is an operation output designation a17, in which operating conditions for the controlled object are written in advance. The columns of the input condition designation field 5 and the operation output designation field 7 correspond to each other.

The operating state of the $ control target is specified in the condition signal field as an input signal in one of the three states of 1'', "0" and "°blank", and each specified input signal corresponds to the input condition The corresponding sequence transition condition (“01”) in the specification column 5
, “00”, “2-bit signal of blank pad)
It is compared and judged. As a result of comparison and judgment, if both match, it is determined that the condition is met, and the operation output specification column 7 in the column corresponding to the sequence transition condition in the input condition specification column 5 is determined.
The operation signal 1IW3 is applied to the operation signal 1IW3. After the operation signal from the operation signal column 3 is given to the controlled object as an output signal, the next sequence control is performed.

However, in the conventional sequence control device described above that performs sequential processing sequence control using a decision table, the input signal condition specified in the condition signal a11 and the output signal specified in the operation signal column 3 are uniquely fixed. Therefore, it is inconvenient when handling signals of the same pattern repeatedly or when handling continuous signals such as analog signals, and there is a problem that efficient control cannot be performed.

(Problems to be Solved by the Invention) As mentioned above, in conventional sequence control devices, input signals and output signals are handled in a fixed manner, so it is difficult to handle signals that repeat the same pattern or analog signals. Moreover, there are problems in that it is extremely inconvenient, lacks operability, and cannot be controlled efficiently.

The present invention has been made based on the above-mentioned conventional problems, and
The purpose is to provide a sequence control device that is highly operable and enables efficient sequence control.

[Configuration of the Invention (Means for Solving the Problems) In order to achieve the above object, the sequence control device of the present invention includes a condition signal registration section in which input signals from a controlled object are registered, and a condition signal registration section that is applied to the controlled object. An operation signal registration section in which output signals are registered; an input condition 0 record section in which sequence transition conditions corresponding to the input signals of the condition signal registration section are registered in advance for each step; and an operation signal registration section in which operation conditions for the controlled object are registered for each step. an operation output registration section registered in advance in the condition signal registration section; and a variable condition registration section in which variable conditions of input signals registered in the condition signal registration section and output signals registered in the operation signal registration section are registered. Features.

(Function) In the sequence control device of the present invention, when the input signal from the controlled object satisfies the sequence transition condition registered in the input condition registration section, the current step is transitioned to the next step, and the output settings of the corresponding step are changed. based on,
An operation signal is given to the controlled object.

In particular, in the present invention, the input signal and the operation signal are changed when the variable condition registration section specifies the input signal and the operation signal, so that the input signal and the operation signal are not treated uniquely or fixedly, thereby increasing the versatility of the device. .

(Embodiment) FIG. 1 is a block diagram showing the configuration of a sequence control device according to the present invention.

This sequence control device 10 includes an input circuit section 11 connected to each operating end of a controlled object 20, a control section 13 that is configured around a CPU and serves as the control center of the device, and a storage section 15. A condition input device 30 for inputting sequence conditions by an operator or the like is connected to the control section 13.

The storage unit 15 includes a condition signal registration unit 15a in which input signals from the controlled object 20 are registered, an operation signal registration unit 15b in which output signals given to the controlled object 20 are registered, and input signals of the condition signal registration unit 15a. an input condition registration unit 15 in which sequence transition conditions corresponding to are registered in advance for each step;
c, and an operation output registration section 15d in which operating conditions for the controlled object 20 are registered in advance for each step, and in particular, in this embodiment, input signals and operation signal registration section 15d registered in the condition signal registration section 15a are provided. It is configured to include a variable condition registration section 15e in which each variable condition of the output signal to be registered is registered.

The registration in each of the registration sections 158 to 15e of the storage section 15 is performed using a decision table shown in FIG.

As shown in the figure, the decision table of this embodiment has a condition signal W11, a 3° input condition specification column 5 for operation signals, and 5. It has an operation output designation column 7. In particular, this embodiment has a variable condition specification field 21 for varying the conditions of the input signal specified by the condition signal ff1I11 and the output signal specified by the operation signal @3.

Next, the operation of the present invention will be explained using the decision table shown in FIG. 2 as ex1 to ex3.

<exl> As shown in Figure 2, the condition signal 1 has an input DI350.
1 is specified, and in the variable condition specification column 21,
Input variable condition DI3515.2 is specified and registered in advance in the condition signal registration section 15a and input condition registration section 15c, respectively.

In this case, the digital input DI35 from the controlled object 20
01 is input to the control unit 13 via the input/output circuit unit 11, the control unit 13 operates only when all inputs from input DI 3501 to every other input DI 3515 (+2 in the number) are on. Output D specified as signal a13 (registered in advance in operation signal n green section 15b)
O3601 is output. As a result, the input/output circuit section 1
An output DO3601 is given to the controlled object 20 via the DO1.

<ex2> This example shows how to handle the case where the input signal is analog.

Analog input 2 for condition signal 1 of the decision table
1PV1 is specified, and the condition GT, 80 is specified in the variable condition specification column 21, and the condition signal registration section 1
5 and is registered in the variable condition registration section 15e.

Then, when the analog human power 21PV1 from the controlled object 20 is input to the control unit 13 via the input/output circuit unit 11,
This control section 13 turns on only when the input 21Pv1 is 80% or more, and the output DO3602 is outputted to the controlled object 20 via the input/output circuit section 11.

<ex3> This example is a case where a variable condition is specified for the operation signal.

The operation output DO3701 and the operation output CNT○1 are designated as the operation signal 11i113, and are registered in advance in the operation signal registration section 15b. Further, a variable condition (CNTOl) of the output signal is specified in the variable condition specification column 2, and is registered in advance in the variable condition registration section 15e.

Then, when the input transition condition is satisfied by the input signal from the controlled object 20, it is counted from the output 003701 and the condition (
The output 0NTO1 of the number specified by CNTOl) is given to the controlled object 20 via the input/output circuit unit 11 as an output signal.

As explained above in ex1, eX2, and ex3, according to this embodiment, input signals and output signals can be handled variably, so it is possible to handle signals of the same pattern repeatedly or when handling analog signals. This makes it extremely convenient.

[Effects of the Invention] As explained above, according to the sequence control device of the present invention, input signals and output signals can be handled variably. This makes it extremely convenient, improves the operability of the device, and enables efficient control.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of a sequence control device to which the present invention is applied, FIG. 2 is a configuration diagram showing a decision table used in the present invention, and FIG. 3 is a block diagram showing a conventional decision table. FIG. 13... Control section 15a... Condition signal registration section 15b... Operation signal registration section 15c... Input condition n green section 15d... Operation output registration section 15e... Variable condition registration section

Claims (1)

[Claims] (1) A condition signal registration section in which input signals from the controlled object are registered, an operation signal registration section in which output signals given to the controlled object are registered, and sequence transition conditions corresponding to the input signals of the condition signal registration section are each The input condition registration section is registered in advance for each step, the operation output registration section is registered in advance for each step, and the input signal and operation signal registration section are registered in the condition signal registration section. A sequence control device comprising: a variable condition registration unit in which each variable condition of an output signal to be outputted is registered;