Siemens 7SR45 - Self Monitoring

Self Monitoring
The 7SR45 Argus relay is built in with a number of self-monitoring features. The self monitoring is performed
periodically when the relay boots up. The supervision includes monitoring of power supply signals, code
execution watchdog, memory checks by checksum, RTC check, and battery health checks. The Protection
Healthy LED is illuminated when the internal power supply signals are healthy.
Internal Relay Failure (IRF)
The internal relay failure feature monitors the healthiness of the relay and supervises the following scenarios
in the presence of auxiliary power/CT power and generates an IRF event.
•
Unexpected (Watchdog) error
In case of an unexpected behavior of the relay, IRF condition is signaled and the relay restarts.
If this error is observed frequently, send the relay to the factory.
•
Internal supply voltage error
The relay monitors the internal supply voltage and in case of an error, the IRF condition is signaled.
The protection functions are blocked during this condition.
•
Card error
In case of I/O card failure, the error message is displayed and the IRF condition is signaled.
The relay performance is not guaranteed, send the relay to the factory.
•
MLFB error
If the device information data is not correct during the startup, the error message is displayed and the IRF
condition is signaled, send the relay to the factory.
•
Calibration error
The relay checks for the integrity of the calibration data during the startup and displays a message in case
of an error. The IRF condition is signaled.
You can acknowledge the error message via HMI only, the default calibration data is applied to the relay
and the IRF condition is cleared.
The relay is functional only when the calibration error message is acknowledged. In this case, the relay
performance is not guaranteed, send the relay to the factory for calibration.
•
Setting error
The relay checks for the integrity of the settings during the startup and displays a message in case of an
error and the IRF condition is signaled.
You can acknowledge the error message via HMI only, the default settings are applied to the relay and
the IRF condition is cleared.
The relay is functional only when the setting error message is acknowledged.
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NOTE
If the device is faulty due to a Card error and/or MLFB error, it must be returned via the standard Siemens
returns process. Contact your regional office.
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NOTE
The following table displays the error messages and the error codes in the Instrument Mode.
Table 8-1 IRF
Errors Error Code Error Message
Setting error 00000001 Load default settings!
Calibration error 00000010 Load default calibration!
8.2
Device Maintenance
8.2 Self Monitoring
Reyrolle, Operating, Manual 91
C53000-B7040-C101-1, Edition 08.2020