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Engineering and remote access
7.10 Parameter write behavior of the SITOP PSU8600
mode. If the control switches into the RUN mode, then the SITOP PSU8600 operates
with this retentive data until the control generates non-retentive (volatile) data.
● Volatile
Volatile data are temporally written to the RAM of the SITOP PSU8600 while the control
is in the RUN mode. After the SITOP PSU8600 restarts, these values are no longer
available. If the control switches into the STOP mode, then the SITOP PSU8600
continues to operate with the volatile data, if this data deviates from the retentive data in
the configuration.
Note
Data are always retentively written via the web server.
If, in the OPC UA client, the SAVE function is deactivated, then the data are always written in
a volatile fashion via OPC UA (exception: user data are always retentively written).
If, in the OPC UA client, the SAVE function is activated, then data is always retentively saved
via OPC UA.
writing data in the STOP or RUN mode via PROFINET
Data can be written in the STOP mode as well as in the RUN mode of the associated control
(PLC). Note the following differences:
● When writing data in the STOP mode of the control, these are saved to the SITOP
PSU8600 configuration. This data is available the next time that the SITOP PSU8600
powers up (independent of the control).
● When writing data in the RUN mode of the control, these are only temporarily saved to
the SITOP PSU8600. The REMOTE configuration parameters are not overwritten. When
the SITOP PSU8600 powers up again, then it starts with these configuration parameters
(temporarily saved data is deleted)
264
Power supply system PSU8600
Manual, 05.2017, A5E36758446-3-76
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