FB_BA_SunBldScn

The function block FB_BA_SunBldScn represents an extension of the manual operation FB_BA_SunBldSw by a scene memory and a call function. The blind actuator FB_BA_SunBldActr or the roller blind actuator FB_BA_RolBldActr can thus be controlled in manual operation mode and can also drive directly to previously saved positions (scenes). Up to 21 scenes can be saved.

Operation

In manual mode, the function block controls the blind function block FB_BA_SunBldActr or the roller blind function block FB_BA_RolBldActr via the command inputs bUp and bDwn; bUp has priority. The commands are passed on to the respective commands bManUp and bManDwn of the positioning telegram. If a command input is activated for longer than the entered time nSwiOvrTi [ms], the corresponding control command latches. Activating a command input again releases this latch.

A rising edge on bSavScn saves the current position and lamella angle in the scene selected in nSlcdScn. This procedure is possible at any time, even during active positioning.

A rising edge at bClScn calls the scene that is present at input nSlcdScn. This scene call can be interrupted by manual commands to bUp and bDwn.

Manual control and scene positioning are each carried out with the priority that is preselected under ePrio.

If the function is no longer active due to the resetting of bEn, then the active flag in the positioning telegram stSunBld is reset and the positions for height and angle are set to "0". The priority function block (e.g. FB_BA_SunBldPrioSwi4) enables a function with lower priority to take over the control by resetting.

Linking to the blind function block

Like the "normal" manual mode function block FB_BA_SunBldSwi, the scene selection function block can be connected either via an upstream priority control FB_BA_SunBldPrioSwi4 or FB_BA_SunBldPrioSwi8, or directly via the blind function block. The connection is established via the positioning telegram ST_BA_Sunbld. Furthermore the scene function block requires the current positions from the blind function block for the reference blind:

Use of a priority controller:

Direct connection:

Inputs

VAR_INPUT
  bEn            : BOOL;
  bUp            : BOOL;
  bDwn           : BOOL;
  nSwiOvrTi      : UDINT;
  nSlcdScn       : UDINT;
  bClScn         : BOOL;
  bSavScn        : BOOL;
  fSpPos         : REAL;
  fSpAngl        : REAL; 
END_VAR

Inputs CONSTANT PERSISTENT

VAR_INPUT CONSTANT PERSISTENT
  ePrio    : E_BA_SunBldPrio := E_BA_SunBldPrio.eScene1;
END_VAR

/ Inputs/Outputs

VAR_IN_OUT
  aSunBldScn : ARRAY[0..BA_Param.nSunPrt_MaxSunBldScn] OF ST_BA_SunBldScn;
END_VAR

Outputs

VAR_OUTPUT
  stSunBld      : ST_BA_SunBld;
  bActv         : BOOL;
  fActlScnPos   : REAL;
  fActlScnAngl  : REAL; 
END_VAR

If an error occurs, this automatic control is disabled and the position and angle are set to 0. This means that if a priority controller is in use, another function with a lower priority (see Overview) automatically takes over control of the blind. In the case of a direct connection, conversely, the blind will drive to position/angle 0.

Requirements