Communication control system applied to industry

Abstract

The invention provides a communication control system applied to industry, comprising a main station controller and multiple current modulating circuits, wherein a current modulating circuit is correspondingly arranged between the station controller and every slave station; the main station controller is used for reading the error rate of every slave station in parallel, adjusting the communication rate according to the error rate; the current modulating circuits are used for modulating current coding or demodulating current coding on the basis of the Manchester code, and ensuring the communication between the slave station and the main station controller. The Manchester code is applied to communicate; synchronous clock can be recovered through decoding; the system has good anti-jamming ability; the error rate of every slave station is read through parallel synchronization, the communication rate is automatically adjusted according to the error rate, so as to guarantee the communication accuracy and reliability; meanwhile, the maximum output current signal is 150 ma, thereby enlarging the application scale of the slave station; a safety grid is arranged on every communication link, thus the output current signal meets the intrinsic safety requirement, and the output cost is saved.

Description

Technical field [0001] The invention belongs to the technical field of industrial automation, and particularly relates to an industrial communication control system applied in industry. Background technique [0002] At present, most of the transmission information in the industrial field is based on the HART protocol and adopts a 4-20 mA loop. Because the current HART communication baud rate is 1200HZ, the amount of data transmitted by the instrument is limited, and it is aimed at the occasions that require large data transmission, such as objects. Graphical display of position information, real-time leakage information of valve positioners, etc. need to reach a transmission rate of more than 100KZH, using HART communication and 4-20 mA current loop, for instruments or application nodes that consume more than 20 mA, they cannot be loaded. At the same time, in order to consider the on-site safety requirements, the instruments used are based on intrinsic safety protocols, and the o...

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Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an industrial communication control system, which is used to solve the problem that the existing control system in the prior art does not have the function of intelligently adjusting the communication baud rate, resulting in the inability to Meet the problem of long-distance transmission

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