Share connection expansion method of controller and device thereof

Abstract

A shared connection expansion method and device for controllers, mainly including built-in programmable logic controllers (PLCs) inside a plurality of controllers, and forming internal communication between each controller through a signal transmission interface to cooperate with the built-in Set the program and detect the unused transmission interface in the programmable logic controller (PLC) built in the controller. Through the shared setting and interface function setting, an expansion interface of another controller is formed. According to the connection expansion requirements, Therefore, the transmission function is improved, the interface is fixed, expansion modules need to be purchased separately, and it takes more time to write communication control programs.

Description

technical field [0001] The present invention relates to a controller, in particular to a programmable logic controller (PLC) built in the controller, which can detect the built-in programmable logic controller (PLC) of a certain controller when signals are transmitted between multiple controllers. The unused transmission interface of the controller (PLC) can be shared with other controllers and used as an expansion interface. Background technique [0002] As we all know, various controllers such as inverters, servers, human-machine interface devices, and temperature control modules have been applied to the control operations of electrical and electronic products with motor equipment. However, the connection and operation control of the above-mentioned various controllers are all realized by the built-in programmable logic controller (PLC), and the programmable logic controller can directly control the internal memory to output control signals, forming a delay-free, noise-fre...

AI Technical Summary

Problems solved by technology

When a user purchases more than two sets of frequency converters, the transmission interface of the built-in programmable logic controller (PLC) of the external frequency converter of the main controller is usually unused, or the user needs to control it through a communication mechanism , but this usually requires the user to spend too much time and labor costs to write appropriate communication and control programs

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