A realization method of profibus redundant ring network optical fiber transceiver

Abstract

The invention discloses an implementation method of a PROFIBUS redundant ring network optical fiber transceiver. The implementation method comprises the steps of 1) collecting a start sign of a PROFIBUS message; 2) collecting and buffering PROFIBUS port message data; 3) processing the received data in a message data buffering region by an FPGA program processing circuit and sending the processed data to an optical fiber interface; 4) processing the data at the optical fiber interface, and judging a ring network state, receiving and transmitting states of an PROFIBUS isolation transceiver; and5) buffering the optical fiber interface message data and sending the data to the PROFIBUS port. The processing method for the PROFIBUS message data is suitable for high-speed signal transmission andimproves the signal transmission stability; meanwhile, establishment of the ring network and judgment and processing of ring network faults and fault recovery are reasonable and reliable in the implementation method, so that reliability and stability of the ring network communication system are improved.

Description

technical field [0001] The invention belongs to the field of field bus optical fiber transceivers, and in particular relates to a method for realizing a PROFIBUS redundant ring network optical fiber transceiver. Background technique [0002] PROFIBUS field bus is one of the most widely used industrial communication networks today. Because the electrical communication network of PROFIBUS field bus is affected and limited by transmission distance, communication rate, electromagnetic interference, etc., it cannot achieve long distance and high speed at the same time. The rate data communication indicator. The PROFIBUS optical fiber transceiver can just convert the PROFIBUS electrical signal message and the optical fiber transmission message, so that the PROFIBUS field bus can achieve the purpose of long-distance and high-speed data transmission. [0003] The redundant ring network PROFIBUS fiber optic transceiver not only supports point-to-point data transmission, but also sup...

AI Technical Summary

Problems solved by technology

The commonly used method is to analyze the message, and then determine the sending or receiving status after the message is analyzed. This method increases the difficulty of FPGA data processing and increases the data processing delay.

[0006] 2. After the PROFIBUS data message is processed by the internal FPGA and photoelectric conversion module of the PROFIBUS optical fiber transceiver, it will inevitably cause data transmission delay and increase the instability of data transmission.

[0007] 3. The ring network construction and fault recovery algorithm of the redundant ring network are different, so the self-healing time of the ring network and the reliability of the ring network communication are quite different.

[0008] The invention patent with the application number 201510598531.X discloses a method for realizing the optical fiber interface conversion module for PROFIBUS. The PROFIBUS message is parsed and modulated / demodulated by the FPGA algorithm, so that the PROFIBUS signal can be transmitted between the electrical network and the The disadvantage of mutual conversion and transmission on the optical fiber network is that the baud rate needs to be changed repeatedly to search for the baud rate and judge the correctness of the message, which increases the network connection time and signal delay. In addition, the invention cannot realize the redundant ring network function

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