Siemens SITOP BUF8600, Manual

Page: 132 / 252

Engineering and remote access
7.3 SIMATIC STEP 7 in the TIA Portal
PSU8600power supply systems
132
Manual, 04.2016, A5E35883207-7-76
Buffering parameters
Parameters Value range Default setting
Buffer component disabled
via control command
Yes/no No
Enable LONGLIFE operat-
ing mode
Yes/no No
Threshold value for suffi-
cient buffer readiness
10 - 90 % 85 %
Enable short-time interrup-
tion at output 1
Yes/no No
Dead time for start of short-
time interruption
0 - 60 000 ms 3 000 ms
Wait time up to short time
interruption
0 - 300 000 ms 15 000 ms
Duration of the short time
interruption
0 - 60 000 ms 5 000 ms
Examples for conversion
ms (milliseconds) s (seconds) m (minutes)
3 000 3
5 000 5
15 000 15 ¼
60 000 60 1
300 000 300 5
● Buffer component disabled via control command
Buffer modules with double-layer capacitors can be deactivated using a control
command. If the parameters are to be activated, then all of the buffer components in the
system are deactivated. System buffering using buffer components is therefore
deactivated; this function can be used for smoothly commissioning the system.
Note
Deactivation via control command is independent of deactivation via control contact, and
further, has the same priority as deactivation using the control contact. This means that
both options to activate the buffer components (control command and control contact)
must be set at the same time (this corresponds to the default setting), in order to allow
the system to be buffered.
● Enable LONGLIFE operating mode
In order to increase the service life of the buffer modules with double-layer capacitors,
these can be operated in the "LONGLIFE" mode with reduced buffer capacity. When the
buffer module is completely charged, power failures of up to a maximum of 3 s
(6EP4293-8HB00-0XY0) or up to a maximum of 8 s (6EP4295-8HB00-0XY0) can be
buffered with a load current of 40 A.