Siemens SIMATIC ET 200AL Manual page 29

Configuration modes for digital inputs/outputs
3.4 Interrupts/diagnostic alarms
Meaning of the LEDs
The following tables set out the meaning of the status and error displays. Remedial
measures for diagnostic reports can be found in chapter Diagnostics alarms (Page 29).
DIAG LED
Table 3- 13
LED channel status
Table 3- 14
LED channel status
PWR LED
Table 3- 15
28
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 cur-
rent 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
LED channel status display
Meaning
Process signal = 0
Off
Process signal = 1
On
Status display of the PWR LED
PWR LED Meaning
Load voltage 2L+ is missing or too low
Off
Load voltage 2L+ present
On
Digital input/Digital output module DIQ 16x24VDC/0.5A 8xM12 (6ES7143-5AH00-0BA0)
Manual, 03/2019, A5E38688112-AC