Siemens NCU 7x0.3 PN Series Manual page 56

Connecting
7.7 PROFINET
LED displays
For diagnostic purposes, the RJ45 sockets are each equipped with a green and an orange
LED. This allows the following status information about the respective PROFINET port to be
displayed:
Table 7- 14
Name
Link
Activity
Beneath the ports are two LEDs with no specific function.
Position of the PROFINET interface
Figure 7-6
56
PROFINET ports LED displays
Color Status
Green On
Off
Orange On
Off
PROFINET interface
Meaning
100 MBit link available
Missing or faulty link
Sending or receiving
No activity
Manual, 09/2011, 6FC5397-1EP40-0BA0
NCU 7x0.3 PN