Siemens SINUMERIK Commissioning Manual page 688

Configuring the system
2.4 PCU 50.3 with SITOP UPS module
Parameterization of the SITOP monitor
Enter the path of the program that ensures that HMI Advanced and the PCU shut down
properly in the event of a power failure into the parameter area of the buffer.
E:\SITOP\Shutdown.bat
Figure 2-4
Alternatively, the following setting can be used: E:\Windows\system32\hmiexit.exe
2.4.2 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 (PCU basic software XP 08.00.00 or higher)
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).
48
Configuration of the SITOP monitor: Buffering settings
Commissioning Manual, 03/2009, 6FC5397-1DP10-4BA0
PCU-Basesoftware (IM8)