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ProSoft Technology MVI71-DFNT User Manual

Page 50

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Diagnostics and Troubleshooting

MVI71-DFNT ♦ PLC 5

User Manual

EtherNet/IP Client/Server Communication Module

Page 50 of 175

ProSoft Technology, Inc.

February 3, 2011

4.1.3 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 plugged into the slot that has been configured

for the module in the I/O Configuration of 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 MVI71-DFNT. Verify that all modules in the rack are correctly

configured in the ladder logic.

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:

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.