Siemens SINUMERIK 828D Series Software And Hardware Service Manual page 84

Service cases - hardware
4.2 PPU 27x.4
The RJ45 socket is equipped with one green and one yellow LED. As a consequence, the
following information of the PLC I/O interface is displayed based on PROFINET:
Name
Link
Activity
Status displays, rear
At the rear of the PPU, the following status displays provide information about the module
state:
Figure 4-4
For diagnostic purposes, the RJ45 sockets, port 1 and port 2 are each equipped with a green
and a yellow LED. As a consequence, the following connection information of the PLC I/O
interface is displayed based on PROFINET:
Name
Link
84
Color State
Green ON
OFF
Yellow ON
OFF
Rear of the PPU
Color State
Green ON
OFF
Meaning
100 MBit link available
Missing or faulty link
Sending or receiving data
No activity
Meaning
100 MBit link available
Missing or faulty link
Service Manual, 08/2018, 6FC5397-5DP40-6BA1
Software and hardware