Siemens SINUMERIK 828D Series Software And Hardware Service Manual page 132

Service cases - hardware
4.9 Control Unit CU320-2 PN and CU310-2 PN
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
Link
Activity
132
Color State
Green Continuous
light
Off
Yellow Flashing
light
Off
Meaning
10 or 100 Mbit link available
Missing or faulty link
Sending or receiving data
No activity
Service Manual, 08/2018, 6FC5397-5DP40-6BA1
Software and hardware