FB_BA_AC_SpTRm_02

The template is a setpoint program for an air conditioning system.

It serves as a setpoint program for an extract air/supply air cascade with a separate room temperature setpoint for heating and cooling mode, including summer and winter compensation.

There are two basic room temperature setpoints (SpHtgY1, SpColY1), with an energy-neutral zone between the lower setpoint (heating mode) and the upper setpoint (cooling mode). An outside temperature-dependent offset of the basic room temperature setpoints is realized via two curve functions (summer/winter compensation).

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

Block diagram

Principle diagram01

Principle diagram02

Syntax

FUNCTION_BLOCK FB_BA_AC_SpTRm_02 EXTENDS FB_BA_View
VAR_INPUT
  fTWth         : REAL;
END_VAR
VAR_OUTPUT
  fSpHtg        : REAL;
  fSpCol        : REAL;
END_VAR
VAR_INPUT CONSTANT
  SpColX1       : FB_BA_AV_Op;
  SpColX2       : FB_BA_AV_Op;
  SpColY1       : FB_BA_AV_Op;
  SpColY2       : FB_BA_AV_Op;

  SpHtgX1       : FB_BA_AV_Op;
  SpHtgX2       : FB_BA_AV_Op;
  SpHtgY1       : FB_BA_AV_Op;
  SpHtgY2       : FB_BA_AV_Op;

  SpHtg         : FB_BA_AV_Op;
  SpCol         : FB_BA_AV_Op;
END_VAR
VAR
  SpColScale    : FB_BA_Chrct02;
  SpHtgScale    : FB_BA_Chrct02;
END_VAR

Inputs CONSTANT

Name	Type	Description
fTWth	REAL	Current value of the outside temperature.

Outputs

Name	Type	Description
fSpHtg	REAL	Calculated setpoint of the supply air temperature for the heater.
fSpCol	REAL	Calculated setpoint of the supply air temperature for the cooler.

Inputs CONSTANT

Name	Type	Description
SpColX1	FB_BA_AV_Op	Input of the value for interpolation point X1 of the summer compensation for the cooling setpoint.
SpColX2	FB_BA_AV_Op	Input of the value for interpolation point X2 of the summer compensation for the cooling setpoint.
SpColY1	FB_BA_AV_Op	Input of the value for interpolation point Y1 of the summer compensation for the cooling setpoint. SpColY1 is the base cooling setpoint.
SpColY2	FB_BA_AV_Op	Input of the value for interpolation point Y2 of the summer compensation for the cooling setpoint.
SpHtgX1	FB_BA_AV_Op	Input of the value for interpolation point X1 of the winter compensation for the heating setpoint.
SpHtgX2	FB_BA_AV_Op	Input of the value for interpolation point X2 of the winter compensation for the heating setpoint.
SpHtgY1	FB_BA_AV_Op	Input of the value for interpolation point Y1 of the winter compensation for the heating setpoint. SpHtgY1 is the base heating setpoint.
SpHtgY2	FB_BA_AV_Op	Input of the value for interpolation point Y2 of the winter compensation for the heating setpoint.
SpHtg	FB_BA_AV_Op	Analog value object for displaying the calculated room temperature setpoint heating.
SpCol	FB_BA_AV_Op	Analog value object for displaying the calculated room temperature setpoint cooling.

Variables

Name	Type	Description
SpColScale	FB_BA_Chrct02	The function block calculates the characteristic cooling setpoint curve (summer compensation) for the current room temperature as a function of the outside temperature.
SpHtgScale	FB_BA_Chrct02	The function block calculates the characteristic heating setpoint curve (winter compensation) for the current room temperature as a function of the outside temperature.

Name

Type

Description

SpColScale

FB_BA_Chrct02

The function block calculates the characteristic cooling setpoint curve (summer compensation) for the current room temperature as a function of the outside temperature.

FB_BA_AC_SpTRm_02 10:

SpHtgScale

FB_BA_Chrct02

The function block calculates the characteristic heating setpoint curve (winter compensation) for the current room temperature as a function of the outside temperature.

FB_BA_AC_SpTRm_02 11:

Requirements

Development environment	Necessary function
TwinCAT from v3.1.4024.56	TF8040 \| TwinCAT Building Automation from V5.8.0.0