Eaton PowerXL DH1 - Modbus Rtu On-Board Communications; Modbus RTU Specifications; Figure 7. Connection Diagram; Figure 8. Terminal Wiring

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Modbus RTU On-Board Communications
POWERXL SERIES VFD MN040010EN—June 2018 www.eaton.com
Modbus RTU On-Board Communications
The drive product can be controlled via Modbus
®
RTU
through the on-board RS-485 terminals.
Figure 7. Connection diagram
The figure shows a typical arrangement with a host
computer (master) and any number maximum 31 slaves
of frequency inverters. Each frequency inverter has a
unique address in the network. This addressing is executed
individually for each VFD via the communication parameters.
The electrical connection between master and the slaves
connected in parallel are implemented via the serial interface
A-B (A = positive, B = negative) with a shielded RS-485
twisted pair cable.
Modbus RTU specifications
Communication board connections
Table 6. Connections
Item Description
Interface
Data Transfer Method
RS-485, half-duplex
Transfer Cable
Twisted pair (1 pair and shield)
Electrical Isolation
Communications
Table 7. Communications
Item Description
Modbus RTU
As described in “Modicon Modbus Protocol
Reference Guide”
found at. http.//public.modicon.com/
Baud Rate
9600,19200,38400,57600,115200
Addresses
1 to 247
Connections
The RS-485 communication port is connected via the AandB
terminals on the drives control board.
Figure 8. Terminal wiring