DP-NET data link control mechanism with strict time certainty

A deterministic and time-based technology, which is applied in the field of data link control protocol and time-deterministic data link control mechanism, to achieve the effect of reducing bus load and improving bus bandwidth utilization

Active Publication Date: 2014-03-05
BEIJING SIFANG JIBAO AUTOMATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to research and develop a DP-NET data link control mechanism with independent intellectual property rights, which highlights the problem of the strict deterministic time of DCS system process data transmission

Method used

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  • DP-NET data link control mechanism with strict time certainty
  • DP-NET data link control mechanism with strict time certainty
  • DP-NET data link control mechanism with strict time certainty

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Experimental program
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Embodiment Construction

[0038] Bus master station data link control mechanism TCDLC of the present invention is made up of following parts:

[0039] 1) Strictly time-deterministic bus polling engine mechanism TCPE;

[0040] 2) Link data additional transmission control mechanism LDAT;

[0041] 3) Time deterministic link data memory control mechanism LDMC.

[0042] 1. Please refer to figure 1 , the master-slave polling engine mechanism TCPE of strict time determinism of the present invention is made up of following parts:

[0043] 1) TCCP responsible for time-deterministic polling control: it consists of a timer (shown in the figure with P1), a time-deterministic polling cycle control table TCPPCT (shown in the figure with P8), and polling mode switch MUX (represented in the figure by P11) constitutes;

[0044] 2) PRC responsible for polling response control: it consists of polling control (shown in the figure with P4) and response control (shown in the figure with P5);

[0045] 3) DLMC responsibl...

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Abstract

The invention provides a DP-NET data link control method with strict time certainty, comprising a time certainty bus polling engine (TCPE) mechanism, a link data additional transmission (LDAT) mechanism and a time definiteness link data memory control (LDMC) mechanism; particularly, a time certainty polling period control table (TCPPCT) is provided to realize strict time certainty polling to each slave station under a given period; the LDAT mechanism is provided to realize the instantaneity of bus management operation on the premise that the strict time certainty polling requirement of each slave station is realized under the given period; the time definiteness link data memory control method is provided to realize the priority level and the certainty of the bus data on the transmission time. Currently, the DP-NET bus with the strict time certainty data link control method can be applied in multiple projects of multiple state-owned big power stations. The practice proves that the DP-NET data link control method with the strict time certainty provided by the invention realizes strict time certainty data access of a main controller to each slave station under the given period, thus achieving the purpose of the invention.

Description

technical field [0001] The present invention relates to a Time Certainty Data Link Control (TCDLC for short) mechanism on a DP-NET (Rigid Time Decentralized Peripheral Access Net, DP-NET for short) bus, and more specifically, relates to a The invention relates to a data link control protocol for realizing strict time-deterministic transmission control of process control data distributed in field slave control devices by a master controller, belonging to the Fieldbus field. technical background [0002] Fieldbus has been widely used in the field of industrial automation control since its birth, providing a more excellent way for industrial automation control data transmission. Through the field bus, the intelligent measurement and control units and the automatic control system distributed on the field form an interconnected communication network, which realizes the digital transmission of the process signal quantity of the field intelligent equipment in the control system. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08
Inventor 朱磊
Owner BEIJING SIFANG JIBAO AUTOMATION
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