FB_DALIV2Light

Operation

A positive edge applied to the bOn input will switch the light to the maximum value (MAX LEVEL) of the control gear. If the function block is executed successfully, the bLight output is set to TRUE. Applying a positive edge to the bOff input will switch the light off, and the bLight output will be set to FALSE. If a positive edge is applied to bToggle, the function block first reads the current light value from the master device, and then decides whether the status of the lamp is on or off. Once this decision has been reached, the lamp is then placed into whatever the other state is, i.e. it is switched from on to off or from off to on.

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
  bOn                        : BOOL;
  bOff                       : BOOL;
  bToggle                    : BOOL;
  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_INPUT
  bLight   : BOOL;
  bBusy    : BOOL;
  bError   : BOOL;
  nErrorId : UDINT;
END_VAR

Requirements