FB_DALIV2Dimmer1SwitchEco

Operating by means of the bSwitchDimm input

The light is switched on or off by a short signal at the bSwitchDimm input. If the signal remains for longer than tSwitchOverTime (recommended value: 200 ms), dimmer mode is activated and the brightness increases or decreases steadily. The dimming direction is changed by briefly removing the bSwitchDimm signal.

Operation by means of the bOn and bOff inputs

The light is immediately switched on or off if a rising edge is applied to the bOn or bOff inputs. The output value is set to 0 when switching off.

Operation by means of the bSetDimmValue and nDimmValue inputs

If the value of nDimmValue changes the devices concerned will be switched to this brightness value immediately. The significant point here is that the value changes. The lighting is switched off by changing the value to 0. If there is a positive edge at the bSetDimmValue input, the value of nDimmValue immediately appears at the output. Immediate modification of the output can be suppressed by a static 1- signal at the bSetDimmValue input. This makes it possible to apply a value to the nDimmValue input, but for this value only to be passed to the output at the next positive edge of bSetDimmValue.

The bSetDimmValue and nDimmValue inputs can be used to implement a variety of lighting scenarios. Direct setting of the output, by means of nDimmValue, can be used to achieve particular brightness levels. Either directly or by continuously changing the value.

Memory function

In contrast to FB_DALIV2Dimmer1Switch, where the memory function can be activated or deactivated via the input bMemoryModeOn, the memory function is always active in this memory-saving version. This means that the last-set value is adopted as the brightness value when switching on. It does not matter whether the light is switched via the input bOn or via the input bSwitchDimm.

Comment on the tSwitchOverTime parameter

If a duration of 0 is specified for the parameter tSwitchOverTime, the bSwitchDimm input can only be used to dim the light. Switching on and off is only possible with the bOn and bOff inputs.

Comment on the nMasterDevAddr parameter

The DALI system provides facilities not just for controlling lamps individually, but also for addressing them as groups or through common commands. Since the individual devices may belong to different groups, the individual lamps may have different brightness states before a group or common control command. So that it is nevertheless possible to be clear whether the lamps now are to be switched on or off, a master device is assigned to each group, whose state is followed by the other devices. It is not necessary to specify a master device if the function block is to be used to control a single lamp, eAddrType = eAddrTypeShort. In this case, the nMasterDevAddr parameter has no significance.

Inputs

VAR_INPUT
  bSwitchDimm                : BOOL;
  bOn                        : BOOL;
  bOff                       : BOOL;
  bSetDimmValue              : BOOL;
  nDimmValue                 : BYTE;
  tSwitchOverTime            : TIME := t#400ms;
  nAddr                      : BYTE := 0;
  eAddrType                  : E_DALIV2AddrType := eDALIV2AddrTypeShort;
  nMasterDevAddr             : BYTE := 0;
  tCycleActualLevelMasterDev : TIME := t#0s;
END_VAR

Inputs/outputs

VAR_IN_OUT
  stCommandBuffer : ST_DALIV2CommandBuffer;
END_VAR

Outputs

VAR_OUTPUT
  nActualLevelMasterDev : BYTE;
  bBusy                 : BOOL;
  bError                : BOOL;
  nErrorId              : UDINT;
END_VAR

Requirements