Circuit and method for automatically detecting RS485 communication failure

A technology for RS485 and communication faults, which is applied in the direction of electrical components, digital transmission systems, transmission systems, etc., can solve the problems of communication faults that are difficult to locate, and achieve the effect of ensuring normal operation

Active Publication Date: 2018-12-25
JIANGSU AEROSPACE DAWEI TECH CO LTD
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a circuit for automatically detecting RS485 communication failures, and a metho

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Circuit and method for automatically detecting RS485 communication failure
  • Circuit and method for automatically detecting RS485 communication failure
  • Circuit and method for automatically detecting RS485 communication failure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0030] The circuit for automatically detecting RS485 communication failures provided by the present invention includes a master device and a slave device;

[0031] The circuit of the main equipment such as figure 1 As shown, it includes a first microprocessor, a first RS485 transceiver circuit, and a second RS485 transceiver circuit; the first RS485 transceiver circuit is connected to the first microprocessor and is provided with external RS485 communication ports A1 and B1; The RS485 transceiver circuit is connected to the first microprocessor, and has external RS485 communication ports A2 and B2; the two external RS485 communication ports A1, B1 and A2, B2 of the main device have independent data transmission and reception functions;

[0032] The circuit of the slave device such as figure 2 As shown, it includes a second microprocessor, a third RS485 transceiver circu

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a circuit for automatically detecting RS485 communication failure, which comprises a master device and a slave device. The circuit of the master device comprises a first microprocessor, a first RS485 transceiver circuit and a second RS485 transceiver circuit. The first RS485 transceiver circuit is connected with the first microprocessor and is provided with external RS485 communication ports A1 and B1. The second RS485 transceiver circuit is connected with the first microprocessor and provided with external RS485 communication ports A2 and B2. The two groups of RS485 communication ports A1, B1 and A2, B2 outside the main equipment have independent data transmitting and receiving functions. The circuit of the slave device comprises a second microprocessor, a third RS485 transceiver circuit, an RS485 receiving circuit and a switching circuit. The external RS485 communication ports A3 and B3 of the third RS485 transceiver circuit are connected with the switching circuit; the external RS485 communication ports A4 and B4 of the RS485 receiving circuit are connected with the switching circuit; a switch circuit controlled by a second microprocessor. The invention can detect the fault in the RS485 line of the access control system in a short time.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Owner JIANGSU AEROSPACE DAWEI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap