Siemens OP5 Equipment Manual page 125

Test and Monitoring Functions
Monitoring
Without the operator normally being aware of it, the OP continually executes
functions the following functions, which contribute to operating reliability of both the
Operator Panel and the link to the PLC:
Voltage monitoring
The supply voltage applied to the device is permanently monitored. As soon
as it falls below 14 V, the processor saves the data structure in the RAM and
flash memory.
Battery monitoring
The voltage of the built-in backup battery is checked at intervals of ten min-
utes. If it drops below 2.5 V, system message "$200 Change battery"
is displayed.
Hardware test Apart from a brief initial start test, which is performed for every cold start of
the OP, a comprehensive hardware test withtest functions for all the impor-
tant components of the device can be initiated by operator input.
Hardware test displays are in German, irrespective of the language you set.
Initiation of hardware test
The hardware test is not initiated at screen level but upon the power supply
being switched on. To initiate the hardware test, press three arrow keys
simultaneously.
Hardware test
From the hardware test menu, you can select individual components for test-
menu
ing. Selection is made by using the UP and DOWN arrow keys, and testing is
initiated by pressing "ENTER".
Display contrast is set at the beginning of the hardware test to an average
value and can be adjusted by means of the LEFT and RIGHT arrow keys.
End of test
Unless specified to the contrary, the system returns automatically to the menu
after every individual test.
When you select "END TEST", a hardware reset is initiated and a cold start
is executed.
Manual OP5, OP15
( ) J31069-D0840-U001-A2-7618
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