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Rockwell Automation 2080-LC20-20QBBR Micro820 20-point Programmable Controllers User Manual User Manual

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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