Rtu Communication Frame Format; Chrysanthemum Connection Applications; Star Connection - INVT Goodrive 300 Operation Manual

inverters
Goodrive300
Figure 5 is the star connection. Terminal resistor should be connected to the two devices
which have the longest distance. (1# and 15#device)
It is recommended to use shield cables in multiple connection. The basic parameter of the
devices, such as baud rate and digital check bit in RS485 should be the same and there
should be no repeated address.
10.3.2 RTU mode

10.3.2.1 RTU communication frame format

If the controller is set to communicate by RTU mode in Modbus network every 8bit byte in
the message includes two 4Bit hex characters. Compared with ACSII mode, this mode can
Figure 3 Chrysanthemum connection
Figure 4 Chrysanthemum connection applications
Figure 5 star connection
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Communication protocol