JPH02138606A - Programmable controller - Google Patents

Abstract

PURPOSE:To correctly and rapidly understand the operation of a sequence program by extracting the data of an address contained in the instruction word immediately before the instruction word is operated by an arithmetic part and an arithmetic result immediately after the instruction word is executed and displaying them together with the instruction word. CONSTITUTION:A command for displaying an instruction word to transfer data between memories and operating the data of one byte or above such as four rules operation on a displaying part 4, is given from an arithmetic part 3 to a control part 1. As a result, in response thereto, an arithmetic part 2 extracts the data of the address included in the instruction word immediately before the instruction word is operated by the arithmetic part 2 and the arithmetic result immediately after the instruction word is executed. Also, the displaying part 4 displays the data of the address included in the instruction word immediately before the instruction word is operated by the arithmetic part 2 and the arithmetic result immediately after the instruction word is executed. Accordingly, immediately before the instruction word is operated by the arithmetic part 2, the data of the address included in the instruction and the arithmetic result immediately after the instruction word is executed are successively displayed together with the instruction word. In such a way, the operation of a sequence program can be correctly and rapidly understood.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a programmable controller that controls various devices according to a predetermined sequence program.

[Traditional techniques]

In conventional programmable controllers, when you want to know the operation result of a command word that performs an operation of 1 byte or more, such as inter-memory transfer or four arithmetic operations during the execution of a sequence program, the on/off status of internal memory and input/output is displayed on the display. The result of the operation of the instruction word was recognized by executing a function to display the command (hereinafter referred to as the input/output monitor function).

(II, I!I to be solved by the invention) However, in the above method of checking the operation result using the input/output monitor function, the operator grasps the address where the operation result of the instruction word is stored and displays it. The operation result cannot be recognized unless the address is set after the unit is switched to the mode of the input/output monitor function, so there is a problem in that the operation is time-consuming.

Sarah, performed during one sequence program! If there are multiple instruction words that store the result at the same address, the input/output monitor is supposed to display the last executed result of the sequence program, so you may not be able to check the result immediately after the operation. There was a problem.

Therefore, an object of the present invention is to provide a programmable controller that can accurately and quickly grasp the operation of a sequence program.

[Means to solve the problem]

In the programmable controller of the present invention, the data of the address included in the instruction word immediately before the instruction word is operated in the operation section and the operation result immediately after the instruction word is executed are displayed in the operation section in response to a display command of the instruction word. A means for extracting the instruction word, and a means for displaying the address data included in the instruction word immediately before the instruction word is operated in the arithmetic unit and the operation result immediately after the instruction word is executed on the display unit together with the instruction word. It is characterized by

[For production]

In the configuration of the present invention, when a command is given from the operation unit to the control unit to display a command word for calculating data of 1 byte or more such as data transfer between memories and four arithmetic operations on the display unit, the operation The display section extracts the data of the address included in the instruction word immediately before the instruction word is calculated by the calculation section and the operation result immediately after the instruction word is executed, and the display section extracts the data of the address included in the instruction word immediately before the instruction word is calculated by the calculation section. The address data included in the instruction word and the calculation result immediately after the instruction word is executed are displayed.

Therefore, if the instruction words to be displayed on the display section are changed sequentially according to the sequence program, for example, the display section will change the instruction words for all the instruction words of 1 byte or more that make up the sequence program immediately before the operation section calculates the instruction words. The address data included in the instruction word and the calculation result immediately after the instruction word is executed are displayed sequentially together with the instruction word, so that the operation of the sequence program can be grasped accurately and quickly.

In this case, in order to execute the above operation, for example, when displaying an instruction word that performs an operation of 1 byte or more on the display section and monitoring the instruction word, only the instruction word to be displayed must be displayed on the operation section. By adding an instruction that calls a subprogram that extracts the data at the address included in the instruction word immediately before the operation is performed and the operation result immediately after the instruction word is executed, and displays it, the above instruction word It is possible to display on the display section the data of the address included in the instruction word immediately before the instruction word is computed by the arithmetic section and the operation result immediately after the instruction word is executed.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 to 3. FIG. 1 shows the configuration of a programmable controller according to an embodiment of the present invention.

In FIG. 1, numeral 1 denotes a control section that performs logical operations on input states and internal information, and numeral 2 denotes an arithmetic section that executes a sequence program. 5 is input/output data and internal information,
An internal memory stores calculation results, etc., and a memory 6 stores a sequence program. 3 is the control unit 1
An operating section 4 is used to input various commands and user programs (sequence programs) to the operating section 3, and a display section 4 displays various commands instructed from the operating section 3, calculation results processed by the calculating section 2, and the like. 7 is an input/output section.

FIG. 2 shows the data at the address included in the instruction immediately before the instruction is operated in the arithmetic section and the data at the address immediately after the instruction is executed when the instruction is displayed on the display section 4 to monitor the instruction. Means for causing an extraction operation section to extract the operation result, and for displaying on a display section the data of the address included in the instruction word immediately before the instruction word is operated by the operation section and the operation result immediately after the instruction word is executed. FIG. FIG. 3 is a flowchart of a sequence program when each of the above-mentioned means is specifically executed.

The programmable controller configured as described above will be explained using FIGS. 1 to 3.

In the programmable controller in the execution state,
When a command to display command words of a sequence program is sent from the operation section 3 to the control section 1, the control section 1 executes the commands based on the flowchart shown in FIG. First, in process 8, it is determined whether the instruction word to be monitored is an arithmetic instruction of one byte or more (hereinafter referred to as a byte arithmetic instruction), and if so, a copy of the instruction word is stored in the storage unit (system area). Execute process 9 to create.

Next, write a CALL instruction to call the subprogram at the beginning of the instruction word. For example, as shown in FIG. 3, if the instruction word ■ of step number 003 is a byte operation instruction, When the command to display is sent, processes 8, 9 and 10 in Figure 2 are executed, so the command word ■
A CALL instruction will be written at the beginning of the file. Thereafter, the sequence program 12 is sequentially executed by the arithmetic unit 2, and when the step number reaches 003, subroutine processes 13, 14, 15, and 16 are executed. That is, in process 13, the data of the address included in instruction word 4 is displayed, in process 14, an operation is performed on instruction word 4, and in process 15, the result of the operation is displayed. In process 16, the process returns to the sequence program 12,
Execute the instruction word ■ of step number 004 of the sequence program 12.

In addition, if a command other than displaying the command word ■ mentioned above is sent from the operation unit 3 to the control unit 1, after repairing the contents of the command word that had been displayed until then, Processing will be performed for another command.

As a result of this configuration, if the command words to be displayed on the display unit 4 are changed sequentially according to the sequence program 12, the display unit 4 will display the commands for all the command words of 1 byte or more that constitute the sequence program 12. Immediately before the instruction word is computed by the arithmetic unit 2, the address data included in the instruction word and the operation result immediately after the instruction word is executed are sequentially displayed together with the instruction word, allowing accurate and accurate operation of the sequence program 12. Can be grasped quickly.

〔Effect of the invention〕

According to the programmable controller of the present invention, the address data included in the instruction word immediately before the instruction word is operated in the arithmetic section and the operation result immediately after the instruction word is executed are extracted and displayed together with the instruction word. It is possible to accurately and quickly understand the operation of a sequence program.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a block diagram showing the configuration of a programmable controller according to an embodiment of the present invention, FIG. 2 is a flowchart showing means for extracting and displaying data immediately before and after execution of a command word, and FIG. The figure is a flowchart showing a sequence program when specifically executing means for extracting and displaying data immediately before and after execution of a command word. DESCRIPTION OF SYMBOLS 1...Control part, 2...Calculation part, 3...Operation part, 4
...Display section, 7...Input/output section Fig.

Claims (1)

[Scope of Claims] A programmable controller capable of executing commands for data transfer between memories and operations on data of 1 byte or more, such as four arithmetic operations, and a control unit that performs logical operations on input states and internal information. a first storage section that stores data processed by the control section; a calculation section that executes the command; a second storage section that stores data executed by the calculation section; and a control section. an operating section for transmitting various commands to the computer; a display section for displaying results processed by the control section and the calculation section; and data of an address included in the instruction word immediately before the instruction word is calculated by the calculation section. means for causing the arithmetic unit to extract an operation result immediately after the instruction word is executed in response to a display command of the instruction word; A programmable controller comprising: means for displaying address data and a calculation result immediately after the instruction word is executed on the display unit together with the instruction word.