Siemens SITOP PSU8600 Manual page 133

● Threshold value for sufficient buffer readiness
The charge state of the buffer components in the system can be interrogated using the
threshold value. The value as a percentage refers to the maximum amount of energy that
can be stored; for several buffer components in the system, the sum of the maximum
amounts of energy that can be stored. This means that it can be ensured that a process
is only started if sufficient buffer energy is available to buffer a possible power failure.
● Enable short-time interruption at output 1
If the function is activated, then when the power supply returns during buffer operation,
the voltage at output 1 is interrupted for a time that can be parameterized. This can be
used to automatically restart a PC, which was run down after the start of buffer operation
to back up data, when the power returns.
● Dead time for start of short-time interruption
Using the parameter, the time is defined that must elapse until after the start of buffer
operation an alarm message "Buffer operation" is output. This means that very short
power failures can be easily buffered, and the alarm message suppressed. For power
failures that last for a longer period of time, the alarm message can then be used to
initiate other specific measures, for example, safely running down a PC.
● Waiting time until short-time interruption
The parameter is used to define the minimum time that must elapse after the "Buffer
operation" alarm message, before the output voltage at output 1 is interrupted when the
power supply returns during buffer operation. For instance, this can be the time that a PC
requires to safely run down.
● Duration of short-time interruption
The parameter is used to define the time for which output 1 is interrupted during buffer
operation when the power returns (for example to restart a PC after it has been run
down).
Output parameters
Outputs are parameterized at the basic units and at the expansion modules in the same
identical way. You can find a list of the parameters under Parameterizing outputs
(Page 136).
PSU8600power supply systems
Manual, 04.2016, A5E35883207-7-76
Engineering and remote access
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