The recommended baud rate and corresponding transmission distance for profibus equipment in a chest-type MCC cabinet are as follows:
During use, the site is recommended to use 187.5 kbit/s or kbit/s.
The problem with high communication rates may be:
(1) A site using N-master, communication baud rate 1.5mbit/s, the master resolution message anomalies, too high baud rate of master is also a big burden, especially when master using pure software protocol stack burden will be more serious.
(2) Higher baud rate, such as 1.5mbit/s, if the communication distance is particularly near <= 1 m, the bus will not be able to communicate normally, about the cause of this problem, I think it is likely to be related to the Profibus bus polling cycle-too close, the baud rate is too high, Input &output less data, the theoretical polling cycle is relatively short, resulting in the bus can not communicate properly.
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Recommended baud rate and corresponding transmission distance for profibus equipment in a drawer cabinet type MCC cabinet