A method for program non-disturbance reconfiguration during the running of programmable controller

Abstract

The invention discloses a program non-disturbance reconstruction method in the operation process of a programmable controller. A control program of the programmable controller comprises a data symbol table, an initialized data table, program codes and a data movement table. The program non-disturbance reconstruction method comprises the steps that the data symbol table, before reconstruction, of the control program of the programmable controller and a data symbol table of the reconstructed control program of the programmable controller are compared to generate a reconstructed data movement table; data in a source address in an operation memory area of the current control program are copied to a target address in an operation memory area of the reconstructed control program according to the reconstructed data movement table, so that data coverage is completed, and control program reconstruction is realized. A control system comprising the programmable controller with the function that programs can be reconstructed without disturbance in the operation process has higher usability, updating of the control program can be realized without disturbance under the conditions that a controlled device is not shut down, the shut-down risk is reduced, and economic loss caused by shut-down is reduced.

Description

technical field [0001] The invention belongs to the technical field of automatic control system controller programming, and in particular relates to a method for reconfiguring a program without disturbance during the operation of a programmable controller. Background technique [0002] The core control equipment in the programmable control system, such as the programmable logic controller (PLC) and the distributed processing unit in the distributed control system (DCS), compile the control program through the programming software and load the control program into the control memory to execute the new control program. Realize the reprogramming of the programmable controller. Traditional programmable controllers usually do not have the ability to program online (the control system needs to be shut down for an update and then restarted) or cannot achieve a disturbance-free control process when the new control program is reconfigured (the new program will cause disturbance to th...

AI Technical Summary

Problems solved by technology

Traditional programmable controllers usually do not have the ability to program online (the control system needs to be shut down for an update and then restarted) or cannot achieve a disturbance-free control process when the new control program is reconfigured (the new program will cause disturbance to the control process when the new program takes effect. equipment malfunction, etc.)

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