ProSoft MVI69E-MBS - Clearing a Fault Condition; Troubleshooting

MVI69E-MBS ♦ CompactLogix Platform Diagnostics and Troubleshooting
Modbus Serial Enhanced Communication Module User Manual
ProSoft Technology, Inc. Page 89 of 154
June 28, 2017
6.2.1 Clearing a Fault Condition
Typically, if the OK LED on the front of the module remains RED for more than
ten seconds, a hardware problem has been detected or the program has exited.
To clear the condition, follow these steps:
1 Turn off power to the rack.
2 Remove the card from the rack.
3 Verify that all jumpers are set correctly.
4 If the module requires a Compact Flash card, verify it is installed correctly.
5 Re-insert the card in the rack and turn the power back on.
6 Verify correct configuration data is being transferred to the module from the
CompactLogix or MicroLogix 1500-LRP controller.
If the module's OK LED does not turn GREEN, verify that the module is inserted
completely into the rack. If this does not cure the problem, contact ProSoft
Technology Technical Support.
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-MBS. 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, then re-insert it, and then restore power to the rack.