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Diagnostics and Troubleshooting MVI56E-MNETCR ♦ ControlLogix Platform
User Manual Modbus TCP/IP Multi-Client Enhanced Communications Module for Remote Chassis
Page 86 of 161 ProSoft Technology, Inc.
4.1 LED Status Indicators
4.1.1 Scrolling LED Status Indicators
The scrolling LED display indicates the module's operating status as follows:
Initialization Messages
Code Message
Boot / DDOK Module is initializing
Ladd Module is waiting for required module configuration data from
ladder logic to configure the application port(s)
Waiting for Processor Connection Module did not connect to processor during initialization

Sample ladder logic or AOI is not loaded on processor

Module is located in a different slot than the one
configured in the ladder logic/AOI

Processor is not in RUN or REM RUN mode
Last config: <date> Indicates the last date when the module changed its IP
address. You can update the module date and time through
the module’s web page, or with the Optional MVI56E Add-On
Instruction.
After power up and every reconfiguration, the module will
display the configuration of the application port(s). The
information consists of:
Client
 C0 C2 C3 C4 ….. C29
Operation Messages
After the initialization step, the following message pattern will be repeated.
<Backplane Status> <IP Address> <Backplane Status> <Port Status>
Code Message
<Backplane Status> OK: Module is communicating with processor
ERR: Module is unable to communicate with processor. For
this scenario, the <Port Status> message above is replaced
with "Processor faulted or is in program mode".
<IP Address> Module IP address
<C0> OK: Port is communicating without error
Communication Errors: port is having communication errors.
Refer to PCB diagnostics (page 85) for further information
about the error.