Bus type distributed control system master-salve station opposite terminal control method

A technology of distributed control and control method, which is applied in the direction of transmission system, bus network, data exchange through path configuration, etc. It can solve the problems of consuming processor resources and complex implementation, and achieves improved communication efficiency, simple implementation method, and polling The effect of speed increase

Inactive Publication Date: 2010-04-21
COMBA TELECOM SYST CHINA LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0007] Of course, some standard data communication control procedures can also be used for master-slave communication, such as ADCCP, SDLC / HDLC, etc., but whether the token method described above or the standard data communication control procedures are used, the disadvantages are that the implementation is more complicated and costly. More processor resources

Method used

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  • Bus type distributed control system master-salve station opposite terminal control method
  • Bus type distributed control system master-salve station opposite terminal control method
  • Bus type distributed control system master-salve station opposite terminal control method

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Embodiment 1

[0028] figure 1 It is a structural principle diagram of the existing bus-type distributed control system, and the master station is connected with each slave station through a bus driver.

[0029] Such as figure 2 Shown, the bus type distributed control system described in the present invention is the bus type distributed control system of RS-485 mode, the MCU (microcontroller) of master station is connected with the MCU of each slave station by RS-485 drive chip, usually The RS-485 driver chip is in the receiving state. When sending data, make it work in the sending state, and immediately make it work in the receiving state after sending the data.

[0030] Such as image 3 As shown, the steps of the master-slave station-to-end control of a bus type distributed control system of the present invention are as follows:

[0031] (1) Each slave station is in the receiving state, the master station sends a command to slave station 1 through the bus, and waits for the receiving s...

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Abstract

The invention provides a master-slave station peer-to-peer control method for a bus-type distribution control system. Compared with prior token control method and standard data communication control procedure method, the method has the advantages of simple implementation, high efficiency, and low resources occupancy. The method is particularly suitable for a bus-type distribution control system with half-duplex hardware such as a RS-485 bus, and implements a simple and high-efficiency peer-to-peer control function by a control method including a unique control token and a combined control process.

Description

technical field [0001] The invention relates to a master-slave station communication technology of a bus-type distributed control system, in particular to a master-slave station-to-end control method of a bus-type distributed control system. Background technique [0002] With the increasing complexity of control systems, a large number of control systems have changed from single-machine control to multi-machine centralized control, which is also called distributed control. In the embedded field, a distributed control system coordinates and controls multiple slave processors to complete the control function by a master processor. Usually we call the control module composed of the master processor a "master station", and each slave processor consists of The control module is a "slave". Distributed control requires that the master station and the slave station must be able to communicate with each other. Currently, the master-slave station communication connection methods comm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/40H04L29/08H04L29/02
Inventor 欧晓明
Owner COMBA TELECOM SYST CHINA LTD
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