Siemens SITOP UPS1600 Equipment Manual page 94

Engineering and remote access
3.5 SIMATIC STEP 7
the value of the connection threshold is subsequently exceeded again, then the SITOP
UPS1600 stops buffering.
• Discharge cut-off voltage
Voltage where battery discharge is exited. For a system battery (SITOP BAT1600 or SITOP
UPS1100) the discharge cut-off voltage defined for this type is always used.
• Wait time for a stable input voltage
Time where the input voltage must continually lie above the connection threshold so that
buffering is exited and a transition is made into normal operation.
• Downtime alarm
The time in which no alarm is issued to the system although it is buffered.
• Buffering permitted
When the connection threshold is fallen below, selects whether the system is buffered or
the output is shut down.
• Activate reset after buffering
If this option is activated, the output voltage is interrupted after the selected buffer time
expires if, in the meantime, the input voltage returns. This option is useful, when, for
example, computer networks are protected by the UPS that can be activated by a reset
when the power supply is restored. For buffer time "MAX", the output voltage is not
interrupted.
Reset parameters
Parameter
Reset time [s]
• Reset time
Duration of the output voltage interruption.
Here, you define the interrupt duration for the "Interrupt output voltage" function (reset after
buffering)
Buffering parameters (2)
Parameter
Expected buffer current [A/10]
• Expected buffer current
Load current, which is expected at the device output during buffer mode. Please adjust
the correct application load current required. For current settings between 0 A and rated
current, the display in the diagram "Remaining buffer time" is adapted. If a value of 0 A is
entered, then for this parameter, the average value of the actual load current measured at
the output over the last 10 min is assumed. The value of this parameter is used when
calculating the remaining buffer time. The entered value may not exceed the rated device
current.
94
Value range
1 ... 120 s
Value range
0 ... 40 A
Equipment Manual, 07.2021, A5E37775406-11-76
Default setting
5 s
Default setting
0 A
SITOP UPS1600 / BAT1600 / UPS1100