Siemens SINUMERIK 840DE sl Commissioning Manual page 1489

2.4.4 Hardware configuration of the SITOP UPS module
Buffering parameterization
The UPS module can be used to select whether buffering should be completed after a
predetermined period of time or not until the accumulator's lowest discharge threshold (=
maximum buffer time) has been reached. Both buffering parameterizations result from this.
"Maximum buffer time" mode
This mode enables the system to be shut down in a time-optimized manner. The UPS
module is synchronized with the shutdown of the operating system. Buffering is maintained
until the operating system has been shut down. The operating system must shut down within
a maximum of five minutes (including all applications). Otherwise, the UPS module buffers
for the maximum buffer time (dependent on the accumulator state).
Required settings on the UPS module (USB interface)
PCU-Basesoftware (IM8)
Commissioning Manual, 02/2014, 6FC5397-1DP40-4BA0
2.4 Configuring the SITOP UPS module for use with the PCU Base Software
On - Off
1 +2V
2 +1V
3 +0.5V
4 +1V
5 +1V
6 +0.5V
7 +0.2V
8 +0.2V
9 +0.1V
10 0.35A / 0.7A
Cut-in threshold
+22V fixed
End-of-charge voltage
+ 26.3V fixed
Charging current
Configuring the system
69