Siemens SIMATIC ET 200AL - LED Meanings (4 xCount); DIAG, Channel, and PWR LED Meanings

Counting
4.2 Configuration method 4xCount
Digital input/Digital output module DIQ 16x24VDC/0.5A 8xM12 (6ES7143-5AH00-0BA0)
Manual, 03/2019, A5E38688112-AC
67
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 69).
DIAG LED
Table 4- 26 Error display of the DIAG LED
DIAG LED
Meaning
Off
No supply voltage 1L+
Flashes
• Module parameters not assigned
(after switching on the supply voltage 1L+)
• 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
On
Module parameters assigned and no module diagnostics
Flashes
Module parameters assigned and module diagnostics
LED channel status
Table 4- 27 LED channel status display
LED channel status
Meaning
Off
Process signal = 0
On
Process signal = 1
PWR LED
Table 4- 28 Status display of the PWR LED
PWR LED
Meaning
Off
Load voltage 2L+ is missing or too low
On
Load voltage 2L+ present