Bosch Rexroth IPC - UPS: Voltage Drop Handling

Security Functions
3–3
1070 073 822-104 (02.06) GB
Voltage drops between 800 ms and 60 s duration
In the event of a voltage drop in excess of 800 ms, the operating system will
initiate a safe shutdown of the operating system after a preselected delay
time.
D If the mains power is restored within a 5-second interval (short break), the
USP will remain disabled (IPC300 only with appropriate settings).
D If the mains power is restored within the next 60 seconds, the USP will
interrupt the operating voltage for another 8 seconds (up to t3), and then
again restart the operating system.
Operating voltage
t
0
t
1
= 800 ms
t
2
< 60 sec
t
3
= t
2
+ 8 sec
Shutdown of the
application program
Operating
system startup
Operating vol-
tage interrupted
for 8 seconds
t
t
V
not loaded
loaded
(standard
operation)
Operating
system
Mains voltage failure Mains voltage available
Operating system
shutdown
Delay Time,
adjustable
Voltage interruption in excess of 60 seconds
After approx. 60 sec the UPS internally switches off the power supply.
t
0
t
1
= 800 ms t
4
= t
1
+ 60 sec
UPS deenergizes power supply
t
V
Operating voltage
not loaded
loaded
(standard
operation)
Operating
system
t
Operating system
shutdown
Shutdown of the
application program
Delay Time,
adjustable
Mains voltage failure
. For the procedures required to adjust the Delay Time with the
“UPS
plus
” supplementary software, see page LEERER MERKER. See
also “UPS
NT
for IPC” (page 3–10), or “UPS
NT
for IPC300” (page 3–13).