Siemens SIMATIC ET 200AL Manual page 26

Diagnostics alarms
5.1 Status and error displays
DIAG LED
Table 5- 1
LEDs Cn
Valid for IO-Link port in IO-Link mode.
Table 5- 2
C1, C2, C3, or C4 LED
PWR LED
Table 5- 3
26
Error display of the DIAG LED
DIAG LED Meaning
No supply voltage 1L+
Off
Module parameters not assigned
•
(after switching on the supply voltage 1L+)
Flashes
Loading firmware
•
(while the firmware update is being performed, all LEDs retain their
current status)
No connection to the ET-Connection and/or the fieldbus
•
Module parameters assigned and no module diagnostics
On
Module parameters assigned and module diagnostics
Flashes
Status displays of the C1, C2, C3, and C4 LEDs
Meaning
Port disabled or in SIO mode
Off
Port in IO-Link mode, device not connected or
port not connected with the configured device
Flashes
Port in IO-Link mode, device not connected
On
Status display of the PWR LED
PWR LED Meaning
Load voltage 2L+ is missing or too low
Off
Load voltage 2L+ present
On
Communication module CM 4xIO-Link 4xM12(6ES7147-5JD00-0BA0)
Manual, 10/2017, A5E32352322-AE