Rockwell Automation 1756-DH485 ControlLogix Data Highway 485 Module Installation Instructions - Manual (Page 15)

ControlLogix DH-485 Communications Module 15
Publication 1756-IN587A-EN-P - September 2005
Check Power Supply and Module Status
At powerup the module’s alphanumeric display begins a cycle through the
following sequences.
• Channel A node address
• Channel A status
• Channel B node address
• Channel B status
This sequence runs continuously during normal module operation.
EXAMPLE
If your module uses Channel A for DH-485 messaging
with node address 14 and Channel B for DH-485
messaging with node address 20 and the channels are
operating properly, you would see A#14, A OK, B#20,
B OK.
Alphanumeric status indicator illuminates and cycles through a sequence of
messages (described in the Alphanumeric Display Descriptions table).
Power Supply indicator
is green.
Module OK status
indicator is solid red,
then flashing green.
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