Siemens SITOP PSU8600, Руководство пользователя

Страница: 188 / 420

Engineering and remote access
7.4 SIMATIC STEP 7 in the TIA Portal
Power supply system SITOP PSU8600
188
Manual, 09.2018, A5E36758446-5-76
● 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.
● Preferred UPS module when the line supply fails
If there are two UPS modules in the system, then it can be defined as to whether a
certain USP module is the preferred module when starting buffer operation when the line
supply fails - or if this should take place alternating between the two UPS modules.
● Preferred charging mode for a system start
The power supply system can be configured so that all of the buffer modules and battery
modules are charged up to a specified level before the power supply system outputs are
activated.
● Enable short-time interruption at output 1
If the function is activated, then when the power supply returns during buffering, 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 mode to back
up data, when the power returns.
● Time X: Dead time up to the beginning of short time interruption
The parameter is used to define the time that must elapse after using the buffer mode,
before an alarm message "Buffer mode" 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.
● Time A: Wait time until the short-time interruption
The parameter is used to define the time that must elapse after the "Buffer mode" alarm
message, before the output voltage at output 1 is automatically interrupted when the
power supply returns during buffering.
Select this time so that it is significantly longer than the expected time for safely and
reliably running down the PC. This is because at the latest when this time expires, the
voltage at output 1 is automatically interrupted - independent of whether the shutdown
has been completed or not.
● Time B: Duration of short-time interruption
The parameter is used to define the time for which output 1 is interrupted during buffering
when the power returns (for example to restart a PC after it has been run down).
● Time C: Waiting time after shutdown completed
The parameter is used to define the time that must additionally elapse after the shutdown
has been completed (i.e. after the client can no longer be accessed via a network ping),
before the output voltage at output 1 is interrupted when the power supply returns during
buffering.