Siemens SIMATIC ET 200SP DI 8x24VDC ST Manual page 22

Meaning of the LED displays
The following tables show the meaning of the status and error displays. Measures for dealing
with diagnostics alarms can be found in the section Diagnostics alarms (Page 22).
DIAG LED
Table 5- 1
DIAG LED
Channel status LED
Table 5- 2
Channel status
PWR LED
Table 5- 3
Digital input module DI 8x24VDC ST (6ES7131-6BF01-0BA0)
Manual, 02/2019, A5E03574157-AF
DIAG LED fault/error display
Meaning
Backplane bus supply of the ET 200SP not OK
off
Module parameters not assigned
Flashes
Module parameters assigned
on
Module diagnostics is available
Flashes
Status display of the channel status LED
Meaning
LED
Process signal = 0
off
Process signal = 1
on
Status display of the PWR LED
PWR LED Meaning
No supply voltage L+
off
Supply voltage L+ present
on
Interrupts/diagnostics alarms
5.1 Status and error display
21