Allen-Bradley MicroLogix 1400 Instruction Manual page 615

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The Baud defaults to 19200.
The Control Line can be configured as:
• No Handshaking
• Full-Duplex Modem (RTS on)
• Half-Duplex Modem (RTS/CTS handshaking).
• No Handshaking (485 Network)
NOTE
The Protocol Control defaults are:
• No Handshaking
• InterChar. Timeout = 0
• Pre Transmit Delay = 0.
When the system driver is Modbus RTU Master, the following
communication port parameters can be changed:
In order to connect directly to an RS-485 Modbus network, use a
1763-NC01 cable and configure the Control Line setting for No
Handshaking (485 network).
Protocol Configuration
Publication 1766-RM001A-EN-P - October 2008
613