Diagnostics and Troubleshooting MVI69L-MBS ♦ CompactLogix Platform
User Manual Communication Module
Page 90 of 154 ProSoft Technology, Inc.
January 6, 2014
6.1 Ethernet LED Indicators
The Ethernet LEDs indicate the module's Ethernet port status as follows:
Ethernet connected at 10Mbps duplex speed
Ethernet connected at 100Mbps duplex speed
No physical network connection is detected. No Ethernet
communication is possible. Check wiring and cables.
Physical network connection detected. This LED must be ON solid
for Ethernet communication to be possible.
6.2 LED Status Indicators
The LEDs indicate the module’s operating status as follows:
Ethernet communications are ok
No Ethernet cable connected
Data is being transferred between the module and the Modbus
network on Port 1
Communication error detected
No Modbus network activity detected
Module is reading configuration
Error setting up Modbus protocol driver, failed startup, or module
shutting down
Processor is in Program mode
The LED is on when the module is performing a write operation on
the backplane. Under normal operation, the LED should blink
rapidly on and off.
Major fault or module shutting down
The program has detected an error or is being configured. If the
LED remains red for over 10 seconds, the program has probably
halted.
During module configuration, the OK LED is red and the BP ACT LED is on. If
the APP, BP ACT and OK LEDs blink at a rate of every one-second, this
indicates a serious problem with the module. Call ProSoft Technology support to
arrange for repairs.
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