Lenze Controller-based Automation - Manual (Page 31)

Lenze · Controller-based Automation - Visualisation · System Manual · DMS 1.5 EN · 04/2014 · TD17
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4 System description
4.2 System components
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4.2.6 Backup of visualisation data (UPS functionality)
The Controllers 3221 C/3231 C back up the visualisation data cyclically every 60 seconds. The
visualisation data backed up are therefore not exactly up-to-date after a voltage failure. Depending
on the time at which the voltage failure occurs, the data status backed up may be out-of-date for up
to 59 seconds (the interval between two backup processes is 60 seconds).
When a voltage failure occurs, the Controllers 3241 C back up the visualisation data on the SD card
in an exactly isochronous fashion if a capacitor pack (CAPS-PACK) is connected.
The Controllers p300/p500 are equipped with implemented UPS for the buffering of visualisation
data.
The EL 100 and EL 100 PLC HMIs are provided with an internal capacitor for buffering the current
supply. Like this, remanent PLC variables can be saved with mains failure protection.
4.2.6.1 Capacitor pack (CAPS-PACK)
The capacitor pack serves to buffer the current supply of the controller/IPC for some seconds. Like
this, current fluctuations can be compensated.
In the case of a power failure, the capacitors ensure the current supply. Within this protected time,
specially marked variable contents (remanent PLC variables) can be saved.
The following controllers and Industrial PCs can be equipped with a capacitor pack (CAPS-PACK) for
backup:
• Controller 3241 C
• EL 1800 - 9800
• CS 5800 - 9800
• CPC 2800
4.2.6.2 Battery pack (ACCU-PACK)
The battery pack serves to bridge longer power failures. Within this protected time, further data
from the visualisation can be saved (in addition to the remanent PLC variables).
Alarms, batch protocols, trends, or recipe data can be saved. If this data has been defined as
remanent memory data it will be written to the memory card via a cache of a variable size.
If a power failure occurs, the battery pack activates an alarm and all data in the cache will be saved.
When the system is restarted, the data saved with mains failure protection will still be available.
The following controllers and Industrial PCs can be equipped with a battery pack (ACCU-PACK) for
backup:
• Controller 3241 C
• EL 1800 - 9800
• CS 5800 - 9800
• CPC 2800
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Operating instructions for controllers / Industrial PCs / HMI
Here, further information can be found.