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Problem
You’ve configured more than one Ethernet device and some are communicating, but
others aren’t.
Solution
It is easy to trouble shoot when you have some devices communicating (at least one).
The quickest way to resolve the problem is to first examine the lights on the PLC and
Ethernet module for a device that is working. Compare this with one that isn’t working
and then read the section on the prior page. You can also simply swap cables and
modules until you figure out what is causing the problem and then focus on the problem.