JP2001022409A - Sequence changing method of programmable controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change a sequence in a short time by writing an operation instruction of an actuator in a data register and writing the operation contents by a program which uses an index register. SOLUTION: Step numbers indicating the order of the operations of respective actuators are written to registers 4 assigned to the respective operating actuators from a touch panel 1. Sequence software stored in a register 4 generates a sequence for generating the operation order table of the actuators through the touch panel 1 and a sequence which operates exactly according to an automatic operation flow and they are download or written to a PC 2. Namely, operation instructions for the automatic operations and origin returns of the actuators are written to data registers 3 in the PC 2 by the touch panel 1 and the operation contents of the actuators are written by the program which uses the index register to change the sequence of the actuators.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for changing a sequence of a programmable controller for controlling a sequence operation of an actuator.

[0002]

2. Description of the Related Art Conventionally, in this type of programmable controller (hereinafter abbreviated as PC), sequence software indicating an operation order of an actuator is created, and the sequence software is downloaded or directly written to a PC to operate. . When the operation order of the actuator is changed, the sequence software is recreated and downloaded or written directly. For example, if the actuator is →→→→→→→
→→→→→→
When changing in the order of →, the operation of is inserted between and and the subsequent sequence is shifted or changed.

[0003]

However, in the above-described conventional PC, since the sequence software is downloaded or directly written, the sequence cannot be easily changed. There were problems such as making mistakes, taking time, and difficult work.

The present invention has been made in view of the above-mentioned problems, and a sequence change method for a PC which can change a sequence easily and in a short time and can reduce errors. It is intended to provide.

[0005]

The sequence changing method of the programmable controller according to the present invention is configured as follows.

(1) A method for changing the sequence of a programmable controller that controls the operation of an actuator, wherein an operation instruction of the actuator is written into a data register in the programmable controller, and the operation content of the actuator is described by a program using an index register. By writing, the sequence of the actuator is changed.

(2) In the above method (1), an operation command for automatic operation and home return of the actuator is written in a data register, and operation confirmation information of the actuator is written in a program.

(3) In the above method (1) or (2), the data register is rewritten using a touch panel.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 is a block diagram showing the internal configuration of the PC, FIG. 2 is a flowchart showing a procedure for creating an operation sequence of the actuator, FIG. 3 is a diagram showing an operation sequence of the actuator, and FIG. 4 is a flowchart showing a sequence operation of the actuator. FIG. 5 is a ladder diagram showing the overall operation of the embodiment.

First, the configuration of the PC will be described. FIG.
, 1 is a touch panel for rewriting the contents of the data register 3 in the PC 2 from the outside, and 4 is each actuator (1, 2, 3,...) In the data register 3.
, M).

In the above configuration, the step number indicating the order in which each actuator operates from the touch panel 1 is written into the register 4 assigned to each operation actuator.

On the other hand, in the sequence software stored in the register 4,
The sequence for creating the operation sequence of the actuator shown in FIG. 3 according to the flow of creating the operation sequence of the actuator shown in FIG. A sequence is created and downloaded or written to the PC 2 in advance.

That is, by writing the operation commands for the automatic operation of the actuator and the return to origin to the data register 3 in the PC 2 by the touch panel 1, the operation contents (confirmation information) of the actuator are written by the program using the index register. The sequence of the actuator is changed.

Next, a procedure for preparing an operation sequence of the actuator will be described with reference to the flowchart of FIG.

In step S1, the register T (k) for various tables is cleared, and the variables k, m, and n are set to the initial value of 1 (one).
Initial reset is performed.

In step S2, it is determined whether or not the actuator is set in a register as a step number for executing the same value as the variable n which is the step number.

In step S3, the last two digits (actuator number m) of the coil number of the actuator that meets the conditions of step S2 are stored in a table register T.
Set to (k).

In step S4, a variable k, which is the position of the last two digits of the coil number of the actuator to be stored next, is set. That is, +1 is added to the table Nok.

In step S5, the variable m which is the last two digits of the coil number of the search actuator is incremented by one.

In step S6, it is determined whether all the assumed actuators have been searched, that is, whether the above processing has been performed.

In step S7, when the step number is the same, the table No. is incremented by 1 instead of writing 0 indicating the end of the registration of the operating actuator. At this time, since it is set to 0 by the initial reset, it is only necessary to add +1.

In step S8, it is determined whether or not the variable k, which is the number of the table registers T (k) for registering the actuators to be operated, is larger than a reserved numerical value (full numerical value).

In step S9, when the state is not full in step S8, the increment Non is incremented by 1 in order to search for an actuator to be executed in the next increment.

In step S10, it is determined whether n representing the execution step number is larger than the last step number.

In step S11, the next execution step Non
In order to find the actuator to execute, the variable m (search actuator number), which is the last two digits of the coil number of the actuator, is set to 1, and the process returns to step S2.

In step S12, the above-described step S12 is executed.
When it is full at step 8, error processing is performed and the operation is terminated.

FIG. 3 is a table showing the operation sequence of the actuator prepared as described above.
, The actuator Nos. 59 and 1 and the ending 0 are shown.

Next, the sequence operation of the automatic operation of the actuator will be described with reference to the flowchart of FIG.

In step S21, it is determined whether or not the vehicle is in automatic operation. If not in automatic operation, k and n are set to 0 elsewhere.

In step S22, it is determined whether or not the content of the register of T (k), which is the k-th table corresponding to the currently executed step, is 0. By the way, if it is 0,
This indicates that all the actuators that should be operated in the currently executed increment are operating.

In step S23, since all the actuators to be operated in the currently executed increment are not operating, the lower two digits No. (m) of the actuator to be operated are referred to from the table, and the actuator is turned on. I do.

In step S24, the above-mentioned step S23
Check if the actuator (m) that was turned on is turned on.

In step S25, the above-mentioned step S23
Since the actuator that was turned on at was turned on,
The table number k is incremented by 1 to refer to the actuator to be N.

In step S26, since all the actuators to be operated in the currently executed increment are operating, the table number k is incremented by 1 to refer to the actuator to be turned on next.

In step S27, the step number n is incremented by 1 to turn on the next actuator to be executed.

FIG. 5 shows the entire operation flow in the form of a ladder in the form of a ladder. The part A shows the software of the flow shown in FIG. 4, and this software is the core software. I'm using Part B shows the software of the flow of FIG. Part C in FIG. 5 shows an example of an operation actuator, and a register D300 is a register for storing an execution variable that changes when returning to the origin.
A register D301 is a register assigned to this actuator, and is a register for writing an execution number outside the PC 2 or from a ladder. D400 is a register that stores an execution variable n that changes during automatic operation. D601 is a register assigned to this actuator, and is a register for writing the execution number outside the PC 2 or from a ladder. Then, when the contents of the registers D400 and D601 are equal and there is no interlock and immediate stop abnormality, the actuator M601 is turned on.

That is, before the apparatus is automatically operated, the operation order of each operation actuator or virtual operation actuator is written into the assigned register by the touch panel, and an operation order table is created. In accordance with the following. When the operation order is changed, the automatic operation is stopped, the operation sequence is changed using the touch panel, and the automatic operation is performed again.

As described above, according to the present embodiment, by using the data register and the index register and performing the programming as described above, the data register in which the sequence is described can be rewritten from the outside or the programming device can be used. The sequence can be changed by using and rewriting.

In order to prevent the data from being easily rewritten by anyone other than the designer, the problem can be solved by writing software for writing a fixed value in the data register by using ladder software.

Here, as another embodiment, for example, RS2
PC2 by serial communication such as 32C or RS422
Using a protocol that rewrites the internal registers of
The sequence may be changed similarly to the above-described embodiment.

The register inside the PC 2 may be rewritten using DI / DO.

Further, a sequence for writing the operation order to each operation actuator by a sequence program may be created, and the sequence for writing the operation order may be rewritten when the operation order is changed.

[0043]

As described above, according to the present invention, P
The operation sequence of the actuator can be changed without rewriting the C sequence program. Therefore, sequence software can be designed even if the operation order of the actuators is not determined, and the design time can be reduced. In addition, even if it is changed by remodeling or the like, it can be easily changed and errors can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an internal configuration of a programmable controller.

FIG. 2 is a flowchart showing a procedure for creating an operation sequence of the actuator.

FIG. 3 is a diagram showing an operation sequence of an actuator.

FIG. 4 is a flowchart showing a sequence operation of an actuator.

FIG. 5 is a ladder diagram showing the entire operation of the embodiment.

[Explanation of symbols]

 1 touch panel 2 programmable controller 3 data register 4 register

Claims (3)

[Claims] 1. A method for changing a sequence of a programmable controller for controlling an operation of an actuator, comprising:
A sequence of the programmable controller, wherein the sequence of the actuator is changed by writing an operation instruction of the actuator to a data register in the programmable controller and writing an operation content of the actuator by a program using an index register. Modification method. 2. The method according to claim 1, wherein operation commands for automatic operation and home return of the actuator are written in a data register, and operation confirmation information of the actuator is written in a program. . 3. The sequence changing method for a programmable controller according to claim 1, wherein the data register is rewritten using a touch panel.