Rockwell Automation 1768-ENBT CompactLogix EtherNet/IP Communication Module Installation Instructions - Manual (Page 19)

CompactLogix EtherNet/IP Communication Module 19
Rockwell Automation Publication 1768-IN002B-EN-P - August 2010
Why Wait for the Lights to Turn Off Before I Remove a Module?
After you turn off the power, wait for all of the lights on the power supply and
controller to turn off before you disconnect any modules.
• When you turn off the power, the controller writes its project to
memory.
• If you don’t wait for the lights to turn off, you will lose your project.
IMPORTANT When you turn the CompactLogix power supply off, make sure
you wait for all status indicators on the power supply and
controller to turn off before disconnecting any part from the
system.
If you disconnect the CompactLogix system while the controller
is still writing its program to memory, the program write will not
be completed and you will lose your program.