Signal control method, signal transmission method, associated equipment and system

Abstract

The invention discloses a signal control method, a signal transmission method, associated equipment and a system. According to the technical scheme, light conversion signals received and sent by an optical communication module are low voltage differential signals, therefore, communication between a main control unit and a power unit can be achieved without external drive circuits, so that CPU resource of the system can be saved greatly.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to a signal control method, a signal transmission method, related equipment and a system. Background technique [0002] Long-distance safe and reliable operation control in the industrial automation control industry is a trend, especially when high-power, medium-high voltage products are used in industries such as coal mine lifting, safety control needs to be guaranteed. [0003] The traditional non-fiber optic communication scheme adopts raising the signal voltage and extending the control signal line to increase the distance between the control terminal and the running terminal, but this scheme makes the transmission signal easy to be lost during the transmission process, and it is easy to be interfered, and the power of multiple frequency converters When the units are paralleled, due to the difference in the wiring distance, the signal consistency will be poor, which will affect...

AI Technical Summary

Problems solved by technology

[0003] The traditional non-fiber optic communication scheme adopts raising the signal voltage and extending the control signal line to increase the distance between the control terminal and the running terminal, but this scheme makes the transmission signal easy to be lost during the transmission process, and it is easy to be interfered, and the power of multiple frequency converters When the units are paralleled, due to the difference in the wiring distance, the signal consistency will be poor, which will affect the stability of the control terminal controlling the running terminal;

[0004] In the traditional optical fiber communication scheme, the industrial quartz optical communication module is used to realize, although the stability of the control terminal to the operation terminal is improved, however, due to the complexity of the peripheral optical signal drive circuit of the industrial quartz optical communication module, it needs to occupy more CPU in the system resource

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