Siemens SIMATIC ET 200SP Manual page 23

Meaning of the LEDs
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 24).
DIAG LED
Table 5- 1
DIAG LED
LED channel status/channel error
Table 5- 2
Channel status
PWR LED
Table 5- 3
Digital output module DQ 4x24VDC/2A HF (6ES7132-6BF20-0CA0)
Manual, 12/2015, A5E32855695-AC
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 and no module/channel diagnostics
On
Module parameters assigned and module/channel diagnostics
Flashes
Status / error display of the LED channel status / channel error
LED channel
LED error
Off Off
On Off
Off On
Status display of the PWR LED
PWR LED Meaning
Missing supply voltage L+
Off
Supply voltage L+ present
On
Meaning
Channel deactivated or process signal = 0
Channel activated and no channel diagnostics
Channel activated and channel diagnostics
Interrupts/diagnostics alarms
5.1 Status and error displays
23