Art. No. DS 4092 TS
Figure 16: Example of the operation concept of the Rotary knob function "Venetian blind" in the
operation concept "Dimming without OFF telegram"
top: Stop telegram after each of the completed control operations
bottom: Stop telegram by changing the direction of rotation (wrong operation)
Dimming with OFF telegram
This operation concept functions in the dimming process just like the concept "Dimming without
OFF telegram", the only difference being that the device can also switch off the activated
actuator by means of a rotary knob operation. For this purpose, the rotary knob evaluates a
brightness value feedback of the dimmer actuator. If the dimmer actuator returns basic
brightness (brightness value = "1", "2" or "3"), it was set to the lowest possible brightness. The
rotary knob then transmits a switch-off telegram immediately to the actuator with the command
"darker OFF" during the next control operation. This is repeated for each subsequent dimming
command "darker - OFF" until the dimmer actuator feedback changes. If dimming occurs in the
opposite direction ("brighter - ON"), the rotary knob transmits a relative dimming telegram to the
bus so that the dimmer actuator switches on.
The rotary knob has two additional communication objects in this operation concept: The 1-byte
object "Feedback brightness value" of the rotary knob is to be connected to the 1-byte
brightness feedback of the activated dimmer actuator. The actuator must actively transmit the
brightness value on change. Only one actuator may ever be linked to the brightness object of
the rotary knob. The rotary knob also transmits an OFF telegram to the dimmer actuator during
an operation ("Darker - OFF") if the last returned brightness value is "0" (OFF after OFF = no
change). The 1-bit object "Switching" must be linked to the switching object of the actuator.
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Software "Rotary sensor with extensions 10FE1x"
Functional description