FB_BA_H_HtgCir01

Template is used to program a static heating circuit.

The main components of the template are:

Flow temperature control.
Heating curve dependent on outside temperature with night setback.
Operation mode selection.
Control of the heating circuit pump.
Control of an analog control valve.

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

Syntax

FUNCTION_BLOCK FB_BA_H_HtgCir01 EXTENDS FB_BA_View
VAR_OUTPUT
  eOpMod       : E_BA_EnergyLvl;
  bRls         : BOOL;
  fSp          : REAL;
  bPu          : BOOL;
  fVlv         : REAL;
END_VAR
VAR_INPUT CONSTANT
  TFl          : FB_BA_SensorAnalog_Raw;
  TRt          : FB_BA_SensorAnalog_Raw;
  Vlv          : FB_BA_Vlv;
  Pu           : FB_BA_Pu1st;
  Sp           : FB_BA_H_HtgCir_Sp;
  OpMod        : FB_BA_H_OpMod;
  HtgLmt       : FB_BA_HtgLmt;
  TFlCtrl      : FB_BA_PID;
  PlantLock    : FB_BA_PlantLock;
END_VAR

Outputs

Name	Type	Description
eOpMod	E_BA_EnergyLvl	Operation mode of the heating circuit.
bRls	BOOL	The variable indicates that the heating circuit is in operation.
fSp	REAL	Calculated setpoint of the heating characteristic curve.
bPu	BOOL	Enable the heating circuit pump.
fVlv	REAL	Calculated control value for the valve.

Inputs CONSTANT

Name	Type	Description
TFl	FB_BA_SensorAnalog	The function block represents the flow temperature.
TRt	FB_BA_SensorAnalog	The function block represents the return temperature.
Vlv	FB_BA_Vlv	Control valve
Pu	FB_BA_Pu1st	Heating circuit pump
Sp	FB_BA_H_HtgCir_Sp	The function block calculates the setpoint of the flow temperature depending on the outside temperature.
OpMod	FB_BA_H_OpMod	Operation mode selection of the heating circuit (day, night, protection mode).
HtgLmt	FB_BA_HtgLmt	The function block enables heating operation below a heating limit temperature.
TFlCtrl	FB_BA_PID	Return temperature sensor
PlantLock	FB_BA_PlantLock	When the function block is called, the relevant faults of the event-enabled objects are collected and output at this and lower levels of the heating circuit. These relevant faults trigger the operation mode "Fault". This switches the heating circuit to "Protection" mode.

Requirements

Development environment	Necessary function
TwinCAT from v3.1.4024.35	TF8040 \| TwinCAT Building Automation from V5.0.0.0