56 Rockwell Automation Publication 2080-UM002G-EN-E - March 2015
Chapter 5 Communication Connections
3. Specify the following parameters:
• Baud rate
• Parity
• Unit address
• Modbus Role (Master, Slave, Auto)
4. Click Advanced Settings to set advanced parameters.
Refer to the table for available options and default configuration for
advanced parameters.
Configure ASCII
1. Open your Connected Components Workbench project. On the device
configuration tree, go to Controller properties. Click Serial Port.
Modbus RTU Parameters
Parameter Options Default
Baud Rate 1200, 2400, 4800, 9600, 19200, 38400 19200
Parity None, Odd, Even None
Modbus Role Master, Slave, Auto Master
Modbus RTU Advanced Parameters
Parameter Options Default
Media RS-232, RS-232 RTS/CTS, RS-485 RS-232
Data bits Always 8 8
Stop bits 1, 2 1
Response timer 0…999,999,999 milliseconds 200
Broadcast Pause 0…999,999,999 milliseconds 200
Inter-char timeout 0…999,999,999 microseconds 0
RTS Pre-delay 0…999,999,999 microseconds 0
RTS Post-delay 0…999,999,999 microseconds 0
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