Central functions

The gateway offers the possibility to specifically connect individual or all group and single devices with up to six central functions. Each central function has a 1-bit object, a 4-bit object and a 1-byte object. The behaviour for controlling a group or single device by means of the central functions can be set to "Switching & dimming" or alternatively to "Permanent" (switching with priority).

Central function = "Switching & dimming":
This function is comparable to various central group addresses that are linked to the objects "Switching - Setting", "Dimming - Setting" and "Brightness value - Setting" of a group or single device. The last command received (ON or OFF, dimming or brightness value) is executed. The polarity of the switching telegram can be configured as inverted if necessary.
The parameter "With relative dimming up in the switched-off state" defines whether a group or single device in the "OFF" state reacts to a relative dimming telegram of the central dimming object or not.

Central function = "Permanent":
The assigned groups and single devices are controlled according to the parameterised command (ON or OFF) and locked during central control. The "Dimming" and "Brightness value" objects of the central function are not evaluated by the assigned groups and single devices. This means that no other central function with the "switching & dimming" function can control a locked group or single device. Controls via normal switching objects are possible. If a group or single device is assigned to several permanent central functions, the configured command decides on the priority of the central function. A "permanent OFF" has a higher priority than a "permanent ON" and thus is preferably executed. Activating a central function "permanent OFF" deactivates other assigned functions for a group or single device with the setting "permanent ON".

Example of permanent central functions

A group is assigned to the central function 1 "Switching", central function 2 "Permanent OFF" and central function 3 "Permanent ON". Central functions 2 and 3 are initially deactivated.
When a central telegram = "activate" is received on central function 3, the assigned group switches on. In this state, it can no longer be controlled by central function 1, since a simple "switching" has a lower priority. When a central telegram = "activate" is received on central function 2, the assigned group switches off immediately. Central function 3 is thus deactivated automatically. Only when central functions 2 and 3 are deactivated can the assigned group be controlled again by central function 1.

All central functions are inactive after the bus/mains voltage returns. No central functions are saved in the event of a bus/mains voltage failure.

In the case of control by a central function, the transmission of the switching status and brightness value can be delayed for each group and single device.

Disconnect central functions

  1. The central functions on the parameter page "DALI system... -> General" with the "Central functions" parameter.
  • The central objects become visible in the ETS. Names can optionally be assigned for the central functions. The names should illustrate the use of the individual central functions (e. g. "All ON", "Central OFF"). The names are only used in the ETS in the text of the central functions and central objects.

Assigning groups and single devices to the central functions

Each group and single device can be assigned to the central functions.

  • The central functions must be enabled.
  1. On the parameter pages "DALI system... -> Configuration groups -> [x] Group name" or "DALI system... -> Configuration single devices -> [x] Device name", set the parameter "Central functions Function and Polarity" to the desired function.
  • The respective group or single device is assigned to the central function. It can be influenced centrally.

The new state set by the central functions is tracked in the status objects and also transmitted to the KNX.

Additional information