Method for controlling communication compensation

A compensation method and communication technology, applied in the direction of digital transmission system, electrical components, transmission system, etc., can solve the problem of reducing the real-time performance of the control system, and achieve the effect of avoiding data delay and ensuring correctness.

Inactive Publication Date: 2014-01-29
SHANGHAI POWER EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to make up for the reduction of the real-time performance of the control system caused by a single communication frame error without hardware failure

Method used

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  • Method for controlling communication compensation
  • Method for controlling communication compensation
  • Method for controlling communication compensation

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Embodiment Construction

[0019] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

[0020] The invention provides a control communication compensation method, the steps of which are:

[0021] Step 1. Connect the main control device and the controlled device through the communication control bus;

[0022] Step 2. Expand a communication compensation interface on both the master control device and the controlled device, and add a communication compensation bus of the same type as the communication control bus;

[0023] Step 3, connect the communication compensation interface of the master control device and the controlled device to the communication compensation bus, and all the master control devices and the controlled devices are added with a communication controller and a communication transceiver used as the communication compensation bus;

[0024] combine Figure 4 , step 4, during the communication process b...

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Abstract

The invention relates to a method for controlling communication compensation. The method includes the step that a main control device and controlled devices are connected through a communication control bus. The method is characterized in that one more communication compensation interface is extended in the main control device and each controlled device, and one more communication compensation bus identical with the communication control bus in type is added in the main control device and each controlled device; the communication compensation interfaces of the main control device and the controlled devices are accessed to the communication compensation bus, and communication controllers and communication transceivers serving as the communication compensation bus are added in the main control device and controlled devices. The method has the advantages that correctness of data within a communication cycle is guaranteed as much as possible, and data delay caused by error of communication frames and leading to influence timeliness of the control system can be avoided.

Description

technical field [0001] The invention relates to a control communication compensation technology, which is used to improve the real-time performance of industrial process control communication bus, and belongs to the technical field of automatic control instruments. Background technique [0002] The traditional distributed control system (DCS) or programmable logic controller (PLC) either adopts its own dedicated communication protocol on the control communication bus, or adopts a communication protocol based on IEEE802. Fieldbus protocols (such as ProfiBUS DP, ModBus, CAN, FF, etc.), because the control communication bus will be connected to quite a lot of communication devices (IO cards) in practical applications, and it may also be designed out of the cabinet, or even in the In the harsh environment with many sources of interference (such as being arranged with the power supply), although most control communication buses are designed to reduce the probability of interferen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/407
Inventor 章伟杰李杨张文
Owner SHANGHAI POWER EQUIP RES INST
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