Siemens SIMATIC Manual page 22

Interrupts/diagnostics alarms
5.1 Status and error displays
Meaning of the LED displays
The tables below explain the meaning of the Status and error displays. Remedial measures
for diagnostics alarms can be found in section Diagnostics alarms (Page 23).
LED DIAG
Table 5- 1
LED DIAG
LED channel status
Table 5- 2
LED channel
LED PWR
Table 5- 3
LED PWR
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Error display of the LED DIAG
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 LED channel status
Meaning
status
Process signal = 0
Off
Process signal = 1
On
Status display of the LED PWR
Meaning
No supply voltage L+
Off
Supply voltage L+ present
On
Digital output module DI 8x24VDC SRC BA (6ES7131-6BF61-0AA0)
Manual, 09/2017, A5E32855511-AC