Rockwell Automation 1738-ADNX ArmorPoint I/O DeviceNet Adapters - Manual (Page 22)

Publication 1738-UM001A-EN-P - February 2005
2-6 What Is the ArmorPoint DeviceNet Adapter?
– If modules of the same type are removed and returned to the
wrong locations, the adapter identifies the returned modules,
updates their MACIDs, and continues operation.
Understand the DeviceNet
Network and Subnet DeviceNet Network
Your adapter serves as a slave to DeviceNet masters. The adapter
receives data from and returns data to the master through the
following I/O connections:
• Change of State (COS)
• Cyclic
• Polled
• Strobe
IMPORTANT
The removal and return scenario exists whether the
system is under power or not. If the system is under
power, the scenario arises immediately. If the system
is not under power, the scenario arises in the next
power cycle.
Also, the example above shows removal of two
adjacent modules. The scenario described exists
anytime 2 or more adjacent modules are removed
and all are not returned.
IMPORTANT
Care must be taken when replacing backplane I/O
modules. Each I/O module stores its configuration
parameters in internal non-volatile memory. You
must either enable ADR for all modules or manually
configure each module in a non-manufacturing
environment when the module is being replaced or
placed on the network for the first time. Failure to do
so could result in inadvertent control attributed to
different configuration settings.