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A hdlc communication module of compactrio

A communication module and communication interface technology, applied in the field of HDLC communication modules of CompactRIO, can solve the problems of modules that do not support the HDLC protocol, etc., and achieve the effects of integrated transmission and processing data reliability, high-efficiency data exchange, and strong functional pertinence

Active Publication Date: 2016-03-23
CRRC QINGDAO SIFANG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to complete data exchange with these systems, the train monitoring system is required to have an HDLC communication interface. At present, there is no module supporting the HDLC protocol among the existing modules of CompactRIO

Method used

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  • A hdlc communication module of compactrio
  • A hdlc communication module of compactrio

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0019] Such as figure 1 As shown, a HDLC communication module of CompactRIO is mainly used in the rail vehicle system, especially the data exchange between the rail vehicle system equipment with HDLC interface and the wheel monitoring system.

[0020] A HDLC communication module of CompactRIO includes FPGA chip, HDLC chip, RS485 interface chip and EEPROM chip.

[0021] The FPGA chip is connected to the CompactRIO through the SPI communication bus, and is also connected to the HDLC chip for data exchange between the HDLC chip and NICompactRIO.

[0022] The RS485 interface chip is connected to the HDLC chip and the communication interface respectively, and is used for communicating with the system with the HDLC interface. And the RS485 interface chip is also connected with the FPGA chip, and the FPGA chip controls the sending and receiving of th...

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Abstract

The invention relates to an HDLC communication module of a Compact RIO. The HDLC communication module of the Compact RIO comprises an HDLC communication module body and a Compact RIO real-time controller. The HDLC communication module body is composed of a bridging chip which is developed through an FPGA, an EERPOM with a memory function, a serial port conversion chip with a memory function and an R485 interface chip. An RS485 protocol is used as a communication physical layer, data exchange is achieved through a user-defined SPI bus, two ways of communication interfaces are arranged externally, so that the communication function of two ways of HDLC protocols is achieved, and the adjustable range of the communication Baud rate is at most 10M. According to the HDLC communication module of the Compact RIO, the controller is combined with an embedded measurement and control system, so that communication interconnection between an urban rail transit train monitoring system and a subsystem with an HDLC port is achieved. The HDLC communication module of the Compact RIO can be widely applied to the control field of railway trains, urban rail transit vehicles and the like and has the advantages of being simple in design, simple to use, high in functional pertinence and reliable in performance.

Description

technical field [0001] The invention relates to a custom communication module for urban rail transit trains, in particular to a CompactRIO HDLC communication module developed for a CompactRIO controller. It can be widely used in control fields such as railway trains and urban rail transit vehicles. Background technique [0002] Since the 1970s, HDLC (High-Level Data Link Control Advanced Data Link Protocol Control) began to be applied in the field of logical transmission of industrial technical data. In the current application field, trains, especially urban rail transit trains, due to long-term mobile operation, The operating environment is faced with various electromagnetic interference and other factors, and the requirements for the efficiency and reliability of signal transmission are getting higher and higher. Traditional HDLC communication module technology needs to continuously improve the transmission capacity under the background of rapid development of domestic rai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L12/02
Inventor 田照耀焦京海马云双彭云龙车聪聪龚明
Owner CRRC QINGDAO SIFANG CO LTD
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