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KNX Actuators / MSA-810 User Manual

Dimmer

Dimmer parameters, staircase options and relative or absolute dimming objects.

elausys · 15 September 2026
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Features

  • Blocking function can be set by a group object for each channel to prevent operating the channel from the bus.
  • Dimming relative and absolute objects.
  • Timing functions (switch-on delay, switch-off delay, staircase duration).
  • Minimum and maximum output can be adjustable.
  • Switch on/off speed and dimming speed adjustable.
  • Staircase function with an optional pre-warning function. Option to extend the staircase duration and to allow manual switch off during the staircase delay.
  • Up to 4 internal scenes configurable per output.
  • Day/Night operation mode with selected behavior when switching on and switching off for each mode.

Parameters

PARAMETERVALUESDESCRIPTION
Scene control: Scene 1 Scene 2 Scene 3 Scene 40 (default) 1 to 64When set to 0 the channel will ignore corresponding scene. When set to another value, the channel will respond to this scene number. Channel state can be store using the scene group object for further recall.
Switch ON delay Switch OFF delayNo delay 250ms to 60 min.The ON or OFF delay causes a delayed switch of the channel. At sending a new switch signal to the channel, first the adjusted delay time expires and afterwards the channel will be switched.
Minimum light1% (default) 0 to 100%Adjust the minimum output percentage. In case a setpoint value lower than this value is received the output is switched off.
Maximum light100% (default) 0 to 100%Adjust the maximum output percentage.
Switch ON/OFF speed1s (default) 0 to 60sDuration to go from 0 to 100% during switching on or off.
Dimming speed5s (default) 0 to 60sDuration to go from 0 to 100% while dimming.
Dimming curveLinear (default) Logarithmic Gamma 1 Gamma 2 Gamma 3 Gamma 4 Gamma 5 DaliDimming curve depending on the driven load.
Behavior on ON telegram (Day)Fixed value (default) Last value No reactionDefine the output value when the channel is switched ON during day or if day/night switch is disabled.
Switch ON value (day)100% (default) 0-100%Fixed value after switched ON during day or if day/night switch is disabled.
Day/Night switchDisabled (default) EnabledEnable or disable the use of the day/night mode.
Behavior on ON telegram (Night)Fixed value (default) Last value No reactionDefine the output value when the channel is switched ON during night if day/night switch is enabled.
Switch ON value (Night)50% (default) 0-100%Fixed value after switched ON during night if day/night switch is enabled.
Behavior on OFF telegram (Night)Fixed value (default) No reactionDefine the output value when the channel is switched OFF during night if day/night switch is enabled.
Switch OFF value (Night)0% (default) 0-100%Fixed value after switched OFF during night if day/night switch is enabled.

In case the staircase light function is enabled the following additional parameters are available:

PARAMETERVALUESDESCRIPTION
Staircase duration1s to 12hTotal duration of the staircase lighting. The channel is automatically switched OFF after this delay.
Extend staircase durationDisabled Enabled (default)When enabled, the staircase duration is extended each time a ON telegram is received on the staircase object.
Manual switching OFFDisabled (default) EnabledWhen enabled, the channel is switched OFF when receiving a OFF telegram on the staircase object.
Prewarning timeNo warning (default) 5s to 5 min.A prewarning can be set before the end of the staircase delay. The channel is switched OFF for 1s and switched ON again until the end of the staircase duration. Prewarning time is the time before the end of the staircase duration.

Communication Objects

NRNAMEFUNCTIONSIZEFLAGSTYPE
1BlockOn/Off1 bitCRWDPT_Enable
2SceneScene1 byteCWDPT_SceneControl
3Switch On/OffOn/Off1 bitCWDPT_Switch
4StaircaseOn/Off1 bitCWDPT_Start
5State On/OffOn/Off1 bitCRTDPT_Switch
6Dimming relativeDim4 bitsCWDPT_Control_Dimming
7Dimming absolutePercent1 byteCWDPT_Scaling
8State dimming valuePercent1 byteCRTDPT_Scaling
9Night (1) / Day (0) SwitchNight/Day1 bitCWDPT_Switch

Manual navigation

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Frequently Asked Questions

What is the difference between relative and absolute dimming?

Relative dimming uses the Dim relative object; absolute dimming sends a target percentage to the Dim absolute object.

Can staircase operation switch the channel off automatically?

Yes. When enabled, the staircase function switches the channel off after its configured duration.

Keep exploring

Find the other guides for this product in the documentation.

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