ProSoft Technology MVI69-HART - Manual (Page 63)

MVI69-HART ♦ CompactLogix Platform Diagnostics and Troubleshooting
HART Multi-drop Master Communication Module User Manual
ProSoft Technology, Inc. Page 63 of 169
March 29, 2012
Module Errors
Problem description Steps to take
BP ACT LED (not
present on MVI56E
modules) remains OFF
or blinks slowly
MVI56E modules with
scrolling LED display:
<Backplane Status>
condition reads ERR
This indicates that backplane transfer operations are failing. Connect to
the module’s Configuration/Debug port to check this.
To establish backplane communications, verify the following items:


The processor is in RUN or REM RUN mode.

The backplane driver is loaded in the module.

The module is configured for read and write data block transfer.

The ladder logic handles all read and write block situations.

The module is properly configured in the processor I/O configuration
and ladder logic.
OK LED remains RED The program has halted or a critical error has occurred. Connect to the
Configuration/Debug port to see if the module is running. If the program
has halted, turn off power to the rack, remove the card from the rack and
re-insert it, and then restore power to the rack.