FB_BA_BuildingSunprotection

This template collects cross-building criteria for the blind functions, which are then further used in the facade instances of the FB_BA_Facade. These are in detail:

• resulting telegram building alarms
• Protection telegram Fire
  The template FB_BA_BuildingAlarms supplies the information "Fire alarm" via a globally declared structure variable stBuildingAlarms (see global variable list Site). If this alarm is active, the blinds are raised completely via a FB_BA_SunBldEvt.
• Protection telegram Burglar
  The template FB_BA_BuildingAlarms supplies the information "burglar alarm" via a globally declared structure variable stBuildingAlarms (see global variable list Site). If this alarm is active, the blinds are raised completely via a FB_BA_SunBldEvt. This makes the burglar less hidden from view from the outside.
• Protection telegram icing
  An imminent icing is detected by the fact that during a precipitation detection the measured outside temperature is below the frost limit value - this is specified here by the object SpIce and is pre-set to -2 °C. If the outside temperature exceeds the frost limit value for the time specified at the object DeiceTi, frost protection is canceled again. In the case of the icing alarm, a telegram is output at the function block FB_BA_SunBldIcePrtc, which causes the blinds to be raised completely.
• Thermal automatic
  As a rule, a weather station does not measure the global heat radiation depending on the direction. Therefore, it makes sense to define a switch-on and a switch-off threshold per building. The objects GlobalThAutoValOn and GlobalThAutoValOff define these threshold values in W/m² and form the building-wide release of the thermal automatic via a hysteresis switch (object GlobalThAutoRlse).
• Twilight automatic
  The twilight, which defines only a short period during the day, is also defined across buildings: the four direction-dependent brightness values of the weather station are averaged and assigned the threshold values GlobalTwiLgtAutoValOn and GlobalTwiLgtAutoValOff.
• Sun protection
  The interval for repositioning the lamellas in the sun protection functions is specified here for the entire building.
• Reset of the manual functions
  A building-wide criterion for the reset of the manual functions is defined here. It is based on the building schedule of energy levels, which give an inference of absence. Alternatively, a binary input object is available.

The above protection telegrams are combined on a priority switch FB_BA_SunBldTgmSel4 to a resulting telegram.

This is made available at the end of the template with the building-specific sun protection data in a globally declared variable structure stBuildingSunBlind (see global variable list Site).

The initialization of the template takes place within the method FB_Init.

Syntax

FUNCTION_BLOCK FB_BA_BuildingSunprotection EXTENDS FB_BA_View
VAR_INPUT CONSTANT
  FireAlert                   : FB_BA_SunBldEvt := (ePrio:=E_BA_SunBldPrio.eFire);
  Burglary                    : FB_BA_SunBldEvt := (ePrio:=E_BA_SunBldPrio.eBurglary);
  IceProtection               : FB_BA_IceProtection;
  GlobalThAutoRlse            : FB_BA_Hys_03;
  GlobalTwiLgtAutoRlse        : FB_BA_Hys_03;
  SunPrtcPosIntval            : FB_BA_AV_Op_SP;
  GlobalResetManMode          : FB_BA_BV_Op_Val;
END_VAR
VAR
  BuildingAlarms              : FB_BA_SunBldTgmSel4;
  GlobalTwiLgtAutoValOnOff    : FB_BA_Swi2P;
  rtManResetEnergLvl          : R_TRIG;
END_VAR