KEB C6 E22 BM-RVL, Instructions For Use Manual

Page: 71 / 114

71
OPErATING SySTEMS
4.3.7 Micro-UPS Handling
As also mentioned in the hardware related parts of this manual all C6 E22 devices are
equipped with a micro-UPS to ensure storage of Retain and Persistent variables of the
Control application in case of power lost.
To avoid inconsistent data sets the Retain and Persistent variables will be stored only if
the µUPS is charged completely. Otherwise the capacity could not be sufficient to store
all variables and consistency of the data set cannot be ensured.
The load time of the micro-UPS is about 15 s for C6 E22, thus normally the micro-UPS
is always charged until the Control application is started after a boot of the device. But
for security and to keep the Control application easy portable to devices this longer char-
ging time the charging level should be evaluated in the Control application.
For this an “Internal I/O Mapping” named “IoDrvUPS” is automatically available with the
C6 E22 device in KEB COMBIVIS studio 6.
To evaluated the „Power status” inside the Control application a variable has to be defi -
ned, e.g. „PowerStatus“.
The values of Power status are:
0 Unit isn‘t available (must not appear on functional C6 E22)
1 Low charge
2 Half charge
3 Full charge
The Machine application should wait until the micro-UPS is fully charged before any
operation is performed which changes Retains or Persistents. This can be achieved with
an implementation comparable with the following example: