Rockwell Automation 855T DeviceNet Stack Light User Manual - Manual (Page 42)

Publication 855T-UM001C-EN-P May 2005
Chapter
6
Off-Line Node Recovery
Chapter Objectives
Overview
The Bulletin 855T Stack Light is equipped with a function known as Off-Line Node
Recovery. Off-Line Node Recovery is used mainly to commission a device on a network.
When a new product is put on the network, it is at a default address of Node 63. If multiple
units are placed on a network without first using node commissioning to change the node
address a duplicate MAC ID error occurs. This means that more than one device is located at
the same node address and only one of them is allowed online. Off-Line Node Recovery now
allows you to recover the faulted devices and change the node address. This is a powerful tool
because multiple nodes can be put on the network on installation and recovered one at a time
without having to continually reset the network. The following section will walk through a
sample recovery.
Note: If the MAC ID is set through the rotary switches, Off-Line Node Recovery will not be
able to recover the faulted device because it cannot change the node address.
Table 6.A
Section Page Section Page
Overview 6-1 Sample Recovery 6-2