Siemens SIMATIC ET 200AL System Manual page 629

Interrupts/diagnostics alarms
5.1 Status and error displays
Meaning of the LEDs
The following tables set out the meaning of the status and error displays. Corrective
measures for diagnostics alarms can be found in the section Diagnostics alarms (Page 35).
DIAG LED
Table 5- 1
LED for the channel status
Table 5- 2
LED 0, 1, 2 and 3 Meaning
32
Error display of the DIAG LED
DIAG LED Meaning
No supply voltage 1L+
Off
• Module parameters not assigned
(after switching on the supply voltage 1L+)
Flashes
• Loading firmware
(while the firmware update is being performed, all LEDs retain their current
status)
• No connection to the ET-Connection and/or the fieldbus
Module parameters assigned and no module diagnostics
On
Module parameters assigned and module diagnostics
Flashes
Status display of the LEDs 0, 1, 2 and 3
• Channel deactivated
Off
• Channel activated and incorrect parameter assignment
• Parameter error possible with GSD
• Channel activated and correct parameter assignment
On
Analog input module AI 4xU/I/RTD 4xM12 (6ES7144-5KD00-0BA0)
Equipment Manual, 08/2021, A5E32350124-AG