42
Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b
Malfunctions
LED
Meaning
Remedy
Flicker
s
green
(appro
x.
10 Hz)
Data traffic activity (traffic).
–
Lights
up
green
Network connection is OK (link).
–
Tab. 50: LED at XF1 IN and XF2 OUT
8.1.4
Device and interface status, ProfiNet
PROFINET LED displays (CMMT-ST-...-PN only)
Together with the 4 LEDs on the top, the NF LED on the front displays the bus/network status.
PROFINET, NF LED; bus error
LED
Meaning
Remedy
Off
No error
–
Flashe
s red
(2 Hz)
Network error
–
No data transmission
–
No configuration
–
No network connection or network
connection is malfunctioning
Check network configuration and net-
work connection.
Tab. 51: NF LED
PROFINET, LEDs at XF1 IN and XF2 OUT; connection status, data traffic
LED
Meaning of the green LED
Remedy
Off
No network connection
Check network connection.
Lights
up
green
Network connection is OK (link).
–
Tab. 52: Green LED at XF1 IN and XF2 OUT
