Bosch Automation CPS21_3, Manual

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Safety Functions
3–4
1070 073 825-103 (02.04) GB
3.3 UPS Program
3.3.1 Function
The ”UPS
NT
” program (Uninterruptible Power Supply) serves to control and
monitor the integrated uninterruptible power supply. In addition, the program
checks the functioning of the rechargeable battery and controls the system’s
temperature monitoring function.
Program and UPS communicate via the COM4 serial port.
In case of a power failure, it is the UPS program’s task within a preset time
(Delay Time: max. 60 seconds)
D
to provide a message to all active applications on the control terminal,
enabling them to be terminated either by the user or by means of special
application routines, and
D
to shut down the operating system after expiration of the Delay Time.
When the voltage monitoring function has responded, the system shut
down can no longer be avoided.
Closing down all active applications prevents loss of data in case of sudden
power failure.
After a maximum of 60 seconds, the UPS shuts down the CPS21_3 /
CPS21_4 power supply unit if the mains voltage has not yet returned (refer to
section 3.2 Function of uninterruptible power supply).
CAUTION
Restarting the system manually leads to loss of data!
The UPS turns off the CPS21_3 / CPS21_4 in any case. Consequently
the dialog ”Restart” must not be activated after the shutdown of the
operating system.
In case of a voltage failure that lasts less than 60 seconds, the opera-
ting system restarts automatically.
During normal operation, the operator does not have access to the UPS
NT
program. It can only be operated and parameterized by persons with special
administrator rights and after restart of the operating system.
.
Modifications to the UPS
NT
parameters require the prior consent of
Bosch.