MVI56E-FLN ♦ ControlLogix Platform
Diagnostics and Troubleshooting
FA Control Network Ethernet Communication Module
User Manual
ProSoft Technology, Inc.
Page 83 of 155
3.3.3 Non-Scrolling LED Status Indicators
The non-
scrolling LEDs indicate the module’s operating status as follows:
LED Label
Color
Status
Indication
LER
(FL-net Link
Status LED)
Red or
Green
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-FLN is 'in-ring' and working normally.
RED
The most common cause is that the module has detected a
communication error during operation of its application port.
The following conditions may also cause a RED LED:
The module is 'out-ring' or has a duplicate node number
(Watchdog timeout error or Wait error may cause this)
The module is rebooting due to a ColdBoot or WarmBoot
request from the ladder logic or Debug Menu
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
OK
Red or
Green
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 is initializing, has detected an internal error, or is
re-booting. 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.
