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Improved daisy chain RS485 control circuit and short circuit solving method

A RS485, control circuit technology, applied in the direction of program control, general control system, control/regulation system, etc., to achieve the effect of ensuring smoothness and improving universality

Active Publication Date: 2018-09-07
安徽威迪智能玻璃有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of the daisy chain RS485 control circuit, the present invention provides an improved daisy chain RS485 control circuit and a short circuit solution, which can effectively solve the short circuit problem of the daisy chain RS485 control circuit and ensure the normal communication control of the daisy chain RS485 control circuit

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  • Improved daisy chain RS485 control circuit and short circuit solving method

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Embodiment Construction

[0020] Such as figure 1 The improved daisy chain RS485 control circuit shown includes a plurality of end-to-end control boards, and is characterized in that: the control board is provided with an MCU control module, an RS485 input module connected to the input end of the MCU control module through a double-pole double-throw relay S3 R1, connected to the double-pole double-throw relay S2 of the input terminal of R1 of the RS485 input module, connected to the double-pole double-throw relay S2 to control the signal input of the adjacent control board double-pole double-throw relay S1, connected to the MCU control through the double-pole double-throw relay S4 The RS485 output module R2 at the output end of the module, the double-pole double-throw relay S5 connected to the output end of the RS485 output module R2, the double-pole double-throw relay S6 connected to the double-pole double-throw relay S5 for control signal output to the adjacent control board, and the A spare RS485 in...

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Abstract

The invention belongs to the field of RS485 wiring control circuits, and particularly relates to an improved daisy chain RS485 control circuit. The improved daisy chain RS485 control circuit comprisesmultiple control boards connected end to end. An MCU control module, an RS485 input module R1, a double-pole double-throw relay S2, a double-pole double-throw relay S1, an RS485 output module R2, a double-pole double-throw relay S5, a double-pole double-throw relay S6, a standby RS485 input module R3 and a standby RS485 output module R4 are arranged on each control board. The double-pole double-throw relays S1 and the double-pole double-throw relays S6 can be directly communicated. Through six double-pole double-throw switches and standby modules arranged for the RS485 input modules and the RS485 output modules respectively, a solving guarantee is provided for a short circuit of the daisy chain RS485 control circuit, and through switching operation of the double-pole double-throw switches, position judgment and overcoming of the short circuit in the control circuit can be achieved.

Description

technical field [0001] The invention belongs to the field of RS485 wiring control circuits, and in particular relates to an improved daisy chain RS485 control circuit and a short circuit solution. Background technique [0002] Because of the characteristics of long-distance, multi-node and low transmission cost of RS485, RS485 becomes the first choice for data transmission. The daisy chain RS485 control communication method has the advantages of using limited signal transmission lines to connect multiple devices, sharing the same service, and there is no bus competition and congestion. [0003] However, in the daisy chain RS485 control circuit, if a certain RS485 chip is short-circuited, the entire system will not be controlled from the short-circuit position, which will affect the performance of the entire communication circuit. Contents of the invention [0004] The present invention aims at the defects of the daisy chain RS485 control circuit, and provides an improved ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
CPCG05B23/0286G05B2219/24065
Inventor 刘毅苏永顺王忠禹米赛
Owner 安徽威迪智能玻璃有限公司