
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: 102 / 174
The position value actually adjusted with the offset after adding the slat position value is always between 0
and 100 %. Minimum and maximum position are thus determined by the slat end positions. These limits
cannot be exceeded by specifying an greater offset. Example (cf. Fig. 34)...
Slat position at the beginning of sunshine/shading = 90 %
Slat position offset at the beginning of sunshine/shading = +30 %
The resulting slat position is 100% as the end position is reached.
In acc. with the KNX datapoint type 6.001 (DPT_Percent_V8), the data format of the communication object
"Sunshine slat position offset" permits presetting positive and negative values in a range of -128 … 0 …
+127. The actuator interprets the value received directly as an offset in %. Values below -100 or above
+100 are limited to the minimum (-100 %) and maximum offset (+100 %) and evaluated accordingly.
An offset preset via the object overwrites the value parameterized in the ETS. In the event of a bus voltage
failure or a mains voltage failure of the actuator, an offset value received via the communication object can
be stored internally in a non-volatile memory so that the offset value last received is not lost even in case
the complete power supply fails (bus voltage and mains voltage failure). As an alternative, the offset preset
via the bus can be reset (0 %) in the event of a power supply failure with the result that the value
parameterized in the ETS is again used in operation. The offset reaction preset in the event of bus or mains
voltage failure can be parameterized in the ETS.
For the sun protection parameters to be visible, the sun protection function must be enabled on parameter
page "Ax – Enabled functions (x = number of output).
The function must be configured for the "Blind" mode of operation.
The reaction at the beginning of sunshine/shading must be configured for fixed or variable position preset.
Set the parameter "Offset with fixed and variable slat position" on parameter page "Ax - Beginning of sun
protection" (x = number of output) to "no offset".
The offset correction is deactivated. During shading (beginning of sunshine/shading), the fixed or variable
slat position will be approached without offset correction. The other parameter relating to the offset are
blanked out.
Set the parameter "Offset with fixed and variable slat position" to "offset as parameterized"
The statical offset correction based on the parameter preset in the ETS is activated. During every
shading operation (beginning of sunshine/shading), the nominal slat position is always corrected by the
parameterized offset value.
Set the parameter "Offset with fixed and variable slat position" to "offset as parameterized and via object"
The offset correction based on the parameter preset in the ETS and via the object is activated. The slat
offset is preset by a fixed value parameterized in the ETS and can be adapted dynamically with a
separate communication object. During every shading operation (beginning of sunshine/shading), the
nominal slat position is always corrected by the preset offset value.
Set the parameter "Slat offset position (-100 … 100 %)" on parameter page "Ax - Beginning of sun
protection" to the desired offset value.
The parameterized value defines the statical offset correction of the slat position. The parameterized
value can be re-adjusted via the "Sunshine slat position offset" object, if the communication object has
been enabled.
Set the parameter "Store slat position offset adjusted via object in case of bus / mains voltage failure ?"
to "no".
The value received via the object will only be stored temporarily in volatile memory. Thus, the value
received via the object only replaces the parameterized value only until the actuator is re-initialized
(return of bus or mains voltage, if both voltages were off beforehand). After the initialization, the offset
value parameterized in the ETS will be used again.