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We totally use your 132 sets of RS485 access control board, and use two FC - 08 converters. It includes two lines. The first line has 103 access controller. The second line has 29 access controller. At the time of connection communication, It is found that the 29 devices of the second line can not communicate. Besides, all the lights of communication interfaces are normally on , unlike normal time, what is the problem?

We totally use your 132 sets of RS485 access controller, and use two FC - 08 converters. It includes two lines. The first line has 103 access controller. The second line has 29 access controller. At the time of connection communication, It is found that the 29 devices of the second line can not communicate. Besides, all the lights of communication interfaces are normally on , unlike normal time, what is the problem?