Flexible Automation
Power supply modules
3-6
1070 072 143-101
The service life of the buffer battery depends
D on the fitting of the control with system modules; see fig. 3-4.
D on the ambient temperature.
D on the clearing time of the control.
. Change buffer battery after 1 year at the latest.
Monitoring the buffer battery
The monitor detects:
D absent buffer battery.
D undervoltage in the buffer battery.
Battery early warning
after
D switching on the power supply module or
D pressing the reset key on the front panel of the power supply module
a load test of the buffer battery is carried out. If an error is detected, the
special marker SM20.1 is set.
Battery failure
After a fault has been detected in the buffer battery, the ZS400 goes into op
erating status. Stop.
A battery failure is detected
D when the buffer battery monitor is switched on and the buffer battery
is absent.
D when the battery voltage is too low.
D when the ZS400 is absent or has already been withdrawn.
A detected battery failure is in addition reported on the 7segment display
of the ZS400; see fig. 4-7.
After the battery failure has been rectified, this must be acknowledged with
the reset key on the front panel of the power supply module.
Failure contact
The failure contact on the power supply module opens when:
D the internal 5 V supply voltage fails.
D ZS400 has operating status Stop
The failure contact is available to the user for systemspecific evaluation.
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