Siemens SIMATIC ET 200SP Manual page 22

Interrupts/diagnostic alarms
5.1 Status and error display
Meaning of the LEDs
The following tables show the meaning of the status and error displays. Corrective measures
for diagnostics alarms can be found in section Diagnostic messages (Page 23).
DIAG LED
Table 5- 1
DIAG LED
Channel status LED
Table 5- 2
Channel status
PWR LED
Table 5- 3
PWR LED
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Error display of the DIAG LED
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
Meaning
Missing supply voltage L+
Off
Supply voltage L+ present
On
Digital input module DI 16x24VDC ST (6ES7131-6BH01-0BA0)
Manual, 09/2017, A5E03573442-AF