Allen-Bradley 1756-L63XT, User Manual

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104 Rockwell Automation Publication 1756-UM001O-EN-P - October 2014
Chapter 6 Serial Communication on 1756-L6x Controllers
DF1 Master Protocol The master/slave network includes one controller that is configured as the master
node and up to 254 slave nodes. Link slave nodes by using modems or line
drivers.
A master/slave network can have node numbers from 0…254. Each node must
have a unique node address. Also, at least two nodes, one master and one slave,
must exist to define your link as a network.