Method for cooperative work of multiple programmable controllers based on data synchronization

Abstract

The invention discloses a method for cooperative work of multiple programmable controllers based on data synchronization. The method comprises the following steps: S1, defining variables, exporting variable declarations and programming; s2, analyzing a program file XML (Extensible Markup Language), distributing a variable address of each programmable controller variable, and processing each pair of export variable relations; and S3, program compilation, the synchronization function block provided by the invention is essentially a performance function for packaging synchronization codes, but is transparent for a user, the user does not need to worry about the realization problem of the synchronization function block, and the realization of the codes can be automatically generated according to the difference of exported variables and the difference of equipment information of the programmable controller; according to the invention, one-time synchronization is carried out on the derived variables of the same programmable controller by using a communication protocol, so that the problem that the waiting time is too long due to too many received and transmitted frames caused by synchronization of only a single variable each time is well solved.

Description

technical field [0001] The implementation of the invention relates to the field of industrial control, and relates to a method for cooperating with multiple programmable controllers based on data synchronization. Background technique [0002] With the continuous development of the industrial control field, the degree of automation is getting higher and higher, the control system in the industrial field is becoming more and more complex, and a single programmable controller can often no longer support the needs of complex control programs. [0003] In order to solve the problem that the programmable controller cannot support the complex control program requirements, most of them adopt to improve or increase the number of I / O points, storage capacity, scan speed, function and number of instructions, type and number of internal components, special Functional units and scalable ways to improve the performance of a single programmable controller. But this method is easy to reach...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of the industrial control field, the degree of automation is getting higher and higher, and the control system in the industrial field is becoming more and more complex. A single programmable controller often cannot support the needs of complex control programs.

[0003] In order to solve the problem that the programmable controller cannot support the requirements of complex control programs, most of the methods are used to improve or improve the I / O points, storage capacity, scanning speed, function and quantity of instructions, types and quantities of internal components, and special functions of the programmable controller. Functional units and scalability to improve the performance of a single programmable controller

But this method is easy to reach the bottleneck of the hardware

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