Siemens SIMATIC ET 200AL System Manual page 245

Interrupts/diagnostics alarms
5.2 Interrupts
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 19).
DIAG LED
Table 5- 1
LED channel status
Table 5- 2
LED channel status
5.2 Interrupts
The DI 8x24VDC 8xM8 digital input module supports diagnostic interrupts.
Diagnostic interrupt
The digital input module generates a diagnostic interrupt at the following events:
● Short-circuit of encoder supply to ground
18
Error display of the DIAG LED
DIAG LED Meaning
No supply voltage 1L+
Off
Module parameters not assigned
•
Flashes Loading firmware
•
(while the firmware update is being performed, all LEDs retain their cur-
rent status)
Module parameters assigned and no module diagnostics
On
Module parameters assigned and module diagnostics
Flashes
LED channel status display
Meaning
Process signal = 0
Off
Process signal = 1
On
Digital input module DI 8x24VDC 8xM8 (6ES7141-5BF00-0BA0)
Manual, 02/2016, A5E32349579-AC