PUSR USR-DR13 Series - Additional Features; Index Function

USR-DR13X User Manual
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Figure 47. The abnormal response of Modbus RTU/TCP
6. Additional features
6.1. Index function
The Index function is mainly to solve the problem that in the TCP Server mode, when the user has multiple
clients connected to the 30X and sends and receives data at the same time, the data source cannot be
distinguished or cannot be sent to a specific client.