Diagnostic Alarms - Siemens SIMATIC S7-1500 Manual

5.2

Diagnostic alarms

Enabling the diagnostic interrupts
You enable the diagnostic interrupts at the basic parameters.
The technology module can trigger the following diagnostic interrupts:
Table 5- 4
Diagnostic interrupt
•
•
•
•
•
Reactions to a diagnostic interrupt
The following happens when an event occurs that triggers a diagnostic interrupt:
● The ERROR LED flashes.
Once you have remedied the error, the ERROR LED goes out.
● The S7-1500 CPU interrupts processing of the user program. The diagnostic interrupt OB
(e.g. OB 82) is called. The event that triggered the interrupt is entered in the start
information of the diagnostic interrupt OB.
● The S7-1500 CPU remains in RUN even if no diagnostic interrupt OB is present in the
CPU. The technology module continues working unchanged if this is possible despite the
error.
Detailed information on the error event is available with the instruction "RALRM" (read
additional interrupt information).
Technology Module TM PTO 4 (6ES7553-1AA00-0AB0)
Manual, 12/2016, A5E38896703-AA
Possible diagnostic interrupts
Parameter assignment error
Internal error
Watchdog tripped. Module is defective.
Supply voltage missing
Error at the digital outputs
Interrupts/diagnostic alarms
Monitoring
Monitoring is always active. A diagnostic interrupt is
triggered each time an error is detected.
Monitoring is always active. A detected error only trig-
gers a diagnostic interrupt if "Enable diagnostic inter-
rupts" has been enabled during device configuration.
The diagnostic interrupts are not enabled in the default
setting.
5.2 Diagnostic alarms
47