Interpret The Module Status Indicator And Display - Allen-Bradley E Series Installation Instructions Manual

24 ControlLogix ControlNet Interface Module

Interpret the Module Status Indicator and Display

The Module Status Indicator LED and Module Status Display table provide
diagnostic information.
Module Status Indicator LED and Module Status Display
LED Display
OK
Off None
Red Msg
(1)
scrolls
BPA#
ERR
BPRX
ERR
BPIC
ERR
CNIC
ERR
Publication
1756-IN604A-EN-P - February 2006
Cause
The module is not
communicating due to a power
supply fault or internal fault.
The module's network address is
set to 00, an invalid ControlNet
network address, or 99, an
invalid ControlNet network
address if you are using
redundant control. See footnote
at end of table.
The module detected a different
slot address from that latched in
at power-up. Excessive noise on
the backplane causes this error.
There are too many CRC errors
being generated by the multicast
backplane receiver, so the
backplane multicast receivers
have been shut off.
There is a hardware fault
within the module.
Action
1. Check the power supply.
2. Check the cable connectors.
3. Make sure the module is firmly
seated in the chassis.
4. If the indicator remains off,
replace the module.
1. (Optional, see page 12.)
Turn chassis power supply off.
2. Remove the module from the
chassis.
3. Set the network address
switches to a unique address
(01-99, or 01-98 if redundant
control)
4. Install the module in the
chassis.
5. If off, turn chassis power
supply on.
Replace the chassis or module.
Replace the module.
Replace the module.