ProSoft Technology MVI69E-MBTCP - Manual (Page 95)

MVI69E-MBTCP ♦ CompactLogix Platform Diagnostics and Troubleshooting
Modbus TCP/IP Enhanced Communication Module User Manual
ProSoft Technology, Inc. Page 95 of 150
May 20, 2015
6.2.2 Troubleshooting
Use the following troubleshooting steps if you encounter problems when the
module is powered up. If these steps do not resolve your problem, please contact
ProSoft Technology Technical Support.
Processor Errors
Problem description Steps to take
Processor fault Verify that the module is securely plugged into the slot that has been
configured for the module in the I/O Configuration in RSLogix.
Verify that the slot location in the rack has been configured correctly in
the ladder logic.
Processor I/O LED
flashes This indicates a problem with backplane communications. A problem
could exist between the processor and any installed I/O module, not just
the MVI69E-MBTCP. Verify that all modules in the rack are correctly
configured.
Module Errors
Problem description Steps to take
BP ACT LED (not
present on MVI56E
modules) remains OFF
or blinks slowly
MVI69 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 (or communication) 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.