DP-NET data link control mechanism with strict time certainty

A data link control and deterministic technology, applied to electrical components, transmission systems, etc., to achieve the effect of reducing bus load and improving bus bandwidth utilization
CN101883126AActive Publication Date: 2010-11-10BEIJING SIFANG JIBAO AUTOMATION +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING SIFANG JIBAO AUTOMATION
Publication Date
2010-11-10

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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.
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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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