Troubleshooting - ProSoft Technology MVI69-GSC CompactLogix User Manual

MVI69-GSC ♦ CompactLogix or MicroLogix Platform
Generic ASCII Serial Communication Module

4.1.2 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
Processor Fault
Processor I/O LED
flashes
Module Errors
Problem Description
BP ACT LED remains
off or blinks slowly
OK LED remains red
ProSoft Technology, Inc.
Steps to take
Verify that the module is plugged into the slot that has been configured for
the module.
Verify that the slot in the rack configuration has been set up correctly in
the ladder logic.
This indicates a problem with backplane communications. Verify that all
modules in the rack are configured in the ladder logic.
Module has a power supply distance rating of 2 on CompactLogix. The
module must be within 2 slots of the power supply on CompactLogix, or
that the MicroLogix backplane can supply the 800ma required for the
module.
Steps to take
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 mode

The backplane driver is loaded in the module

The module is configured for read and write block data transfer

The ladder logic handles all read and write block situations

The module is configured in the processor
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 the card in the rack, and then restore power to the rack.
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User Manual
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