Siemens SINAMICS S120 Operating Instructions Manual page 56

Control via the operator panel
4.6 Menu commissioning / service
Battery status
This menu displays the battery voltage (in volts and as a bar chart). The battery ensures that
the data in the database and the current time are retained.
When the battery voltage is represented as a percentage, a battery voltage of ≤ 2 V is equal
to 0%, and a voltage of ≥ 3 V to 100%.
The data is secure up to a battery voltage of 2 V.
● If the battery voltage is ≤ 2.45 V, the message "Replace battery" is displayed in the status
bar.
● If the battery voltage is ≤ 2.30 V, the system displays the following message: "Alarm,
weak battery".
● If the battery voltage is ≤ 2 V, the system displays the following message: "Caution: The
battery is dead".
● If the time and/or database are unavailable due to lack of voltage after a prolonged
system downtime, the loss is established by means of a CRC check when the system is
switched on again. This triggers a message instructing the user to replace the battery and
then load the database and/or set the time.
For instructions on how to change the battery, see "Maintenance and servicing".
Keyboard test
In this screen, you can check that the keys are functioning properly. Keys that you press are
represented on a symbolic keyboard on the display. You can press keys in any order you
wish. You cannot exit the screen (F4 – "Back") until you have pressed each key at least
once.
Note
Exit keyboard test
You can also exit the key test screen by pressing any key and keeping it pressed.
LED test
In this screen, you can check that the four LEDs are functioning properly.
Database statistics
For service purposes, the database statistics are displayed in the screen form.
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Cabinet Modules Operator Panel AOP30
Operating Instructions, 04/2014, A5E03263551A