Rotary/Slide encoder

Two sensor functions can be selected for the rotary/slide encoder sensor type:

• Switching/brightness value transmitter
  This sensor function contains a 1-bit communication object for the switching function and a 1-byte communication object to send the brightness as a percentage value.
  These two functions correspond to instance type 1 (push-button sensor) and instance type 2 (absolute input device). These are standard instances that are generally supported.

If a rotary sensor is used for the "Switching/brightness value transmitter" sensor function, the parameters of the groups or individual devices to be controlled should be adjusted if necessary in order to achieve the desired setting behaviour. For example, the switching/dimming behaviour of a DALI group should be set to "jump to" and not "dim to" for receiving brightness values and set to "no reaction" instead of "switch on" for relative dimming up in a switched off state.

• Switching/dimming
  Three communication objects are available for this sensor function.
  A 1-bit communication object for the switching function.
  A 4-bit communication object for sending a dimming command for brightness control by rotating or sliding the encoder
  A 4-bit communication object for sending a dimming command for colour temperature control by simultaneously pressing and sliding/rotating the encoder.
  
  These three functions correspond to instance type 1 (push-button sensor) and twice to instance type 0 (generic input). Instance type 0 is an instance that is specified by the sensor manufacturer and is generally not supported by the DALI Gateway.

The ETS provides the corresponding parameters and communication objects dynamically for the function according to the parameterised function.

The 4-bit dimming objects can be used not only to change the brightness, but also to change the colour temperature or light colour. In this case, the communication objects of the sensors must be linked to the corresponding objects of the DALI groups or individual devices.

An optional disabling function can be activated for the rotary/slide encoder.

Type of actuation

As the name suggests, the rotary encoder is an operating device that transmits absolute or relative values by means of a rotary motion. For example, the brightness of a light can be increased by turning it clockwise and reduced by turning it anti-clockwise.
Rotary encoders can have end stops or support endless rotation as incremental encoders. Most rotary encoders also have an integrated press function, providing an additional operating option.

When operating the slide encoder, a sliding motion occurs in a horizontal or vertical direction. Slide encoders are generally designed as absolute encoders because the setting range is between two end values. The slide encoder can also have a push function that can be used for switching.