A control system based on dmx512 protocol and its control method

Abstract

The invention provides a control system based on a DMX512 protocol. The control system comprises a DMX512 master controller, a data bus, N node controllers (N>=1) and controlled electric appliances. The DMX512 master controller and the node controllers form a bus network. Each node controller comprises a control signal input end, a control signal output end, an address signal input end and an address signal output end. The control signal input ends are connected with the data bus; and the control signal output ends are connected with the controlled electric appliances; the address signal input end of the nth node controller is connected with the address signal output end of the (n-1)th node controller (1<n<=N); the control system also comprises end identification marks; and the address signal input end of the first node controller and the address signal output end of the Nth node controller are connected with the end identification marks. The invention also provides a control method of the control system. According to the technical scheme, address writing is directly controlled through the master controller; the address writing process does not need the participation of men; and address writing can be done quickly.

Description

technical field [0001] The invention relates to a control system based on DMX512 protocol and a control method thereof. Background technique [0002] The DMX512 protocol was first proposed by the USITT (United States Institute of Theater Technology) as an international protocol for dimming and lighting console data transmission standards and general signal control for digital equipment in the lighting industry. The DMX512 protocol is simple, reliable, and flexible. It has been widely used in the field of lighting control in theaters, studios, and now it has been more and more used in the control system of LED lamps. [0003] The DMX512 bus protocol is used for control, and each product must be set with a unique address. There are three common address writing methods in the market today: [0004] 1) Address fixed method: DMX512 receiver writes a fixed address before installation, and installs according to the order of addresses during installation. The programming address ...

AI Technical Summary

Problems solved by technology

This method is inefficient, and it is easy to miss dialing and wrong dialing during installation, which requires relatively high requirements for construction personnel.

[0006] 3) Dynamic addressing mode: every time the system is powered on, it will re-address, but once a node in the system is damaged, it will affect this addressing action, and the system may have large-scale errors

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