Switch/shutter actuator 8/4gang 16A RMD
75318003
Switch/shutter actuator 16/8gang 16A
RMD
75310002
Technical
Documentation
© Berker GmbH & Co KG 2007
Version: 04.04.2007
Part 5
(Subject to prior change)
75310002.doc
Seite: 86 / 174
Presetting the position feedback for slat positions (only with blinds)
The feedback functions for the slat positions can be enabled and programmed independently for each
output. The slat position feedback can be used like the position feedback for the height of the blind as an
active signalling object or as a passive status object.
In case of an actively transmitting signalling object, the current slat position can be transmitted to the bus
after bus voltage return, if the position value differs from the one last transmitted. When the position data
are known, the feedback telegram can in this case be transmitted with a time delay to reduce the bus load,
with the delay being preset globally for all outputs in common (cf. "Delay after bus voltage return").
The feedback functions of an output must be enabled on parameter page "Ax – Enabled functions" (x =
number of output). Only then are the parameters for the slat position feedback functions visible.
Set the parameter "Slat position feedback" on parameter page "Ax – Feedbacks" to "feedback object is
active signalling object".
The feedback object is enabled. The position value is transmitted as soon as it changes. No value will be
actively transmitted, if the position is unknown.
Set the parameter "Slat position feedback" on parameter page "Ax – Feedbacks" to "feedback object is
passive status object".
The feedback object is enabled. The position value will be transmitted in response only if the feedback
object is read out from by the bus. If the position is unknown, a value of "0" will be reported back after
readout.
The feedback function must be preset as actively transmitting function.
If a time delay after bus voltage return should be necessary, the parameter "Time delay for feedback
after bus voltage return" on parameter page "Ax – Feedbacks" must be set to "yes".
The position is then reported back with a time delay after bus voltage return. After the end of the time
delay, the position last adjusted statically will be transmitted to the bus. Although the feedback object
concerned is updated during a running delay, no feedback telegram will, however, be actively transmitted
during such delay, even if a position value changes during the delay.
Behaviour of position feedback in case of voltage failure and voltage return:
When the bus voltage returns, with the mains voltage supply to the actuator being on, the current position
data are always written into the feedback objects. The positions are transmitted to the bus also in those
cases where the feedback objects are actively transmitting objects and where the position data differ
from the data last reported back, for instance, as a result of manual control. If the position data are
unknown, the feedback objects are initialized with "0" and are not transmitted to the bus.
Without mains voltage supply, the connected drives are not activated so that there is always no position
feedback, even after return of the bus voltage.
In case of mains voltage return, the parameterized behaviour will be executed. The feedback objects are
then updated provided the bus voltage is on.
In case of blinds operation, any position change of the blind within the limits of the slat adjustment (0 to
100 %) does not launch a travel movement and therefore no change of the feedback position data either.
