Rockwell Automation 2080-LC20-20QBBR Micro820 20-point Programmable Controllers User Manual - Manual (Page 54)

46 Rockwell Automation Publication 2080-UM005A-EN-E - December 2013
Chapter 5 Communication Connections
2. Select Modbus RTU on the Driver field.
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.
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