Diagnostics and Troubleshooting
User Manual
4.8.3 Non-Scrolling LED Status Indicators
The non-scrolling LEDs indicate the module's operating status as follows:
LED Label
Color
APP
Red or
Green
OK
Red or
Green
ERR
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Modbus TCP/IP Interface Module with Reduced Data Block
Status
Indication
OFF
The module is not receiving adequate power or is not securely
plugged into the rack. May also be OFF during configuration
download.
GREEN
The MVI56E-MNETR is working normally.
RED
The most common cause is that the module has detected a
communication error during operation of an application port.
The following conditions may also cause a RED LED:
The firmware is initializing during startup
The firmware detects an on-board hardware problem
during startup
Failure of application port hardware during startup
The module is shutting down
The module is rebooting due to a ColdBoot or WarmBoot
request from the ladder logic or Debug Menu
OFF
The module is not receiving adequate power or is not securely
plugged into the rack.
GREEN
The module is operating normally.
RED
The module has detected an internal error or is being
initialized. If the LED remains RED for over 10 seconds, the
module is not working. Remove it from the rack and re-insert it
to restart its internal program.
Not Used
MVI56E-MNETR ♦ ControlLogix Platform
ProSoft Technology, Inc.
June 14, 2011
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