Status displays of PROFINET interfaces
The RJ45 sockets are equipped with one green and one yellow LED. As a consequence, the
following information of the PLC I/O interfaces is displayed based on PROFINET:
Name Color State Meaning
Link Green Continuous
light
10 or 100 Mbit link available
Off Missing or faulty link
Activity Yellow Flashing
light
Sending or receiving data
Off No activity
Service cases - hardware
4.9 Control Unit CU320-2 PN and CU310-2 PN
Software and hardware
132 Service Manual, 08/2018, 6FC5397-5DP40-6BA1
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