FB_BA_AC_EnPrio

The template represents the system enable and the enable of the priorities Safty, Critcial and Program of an air conditioning system.

The multiplexers PrioSwiPlt, PrioSwiSfty, PrioSwiCrit and PrioSwiPgm use the plant operation mode eOpMode to define the system enable for activating the step sequence control of a system and enabling the priorities "Safety", "Critcial" and "Program", see command structure stPriorityEn.

eOpmode	Value	Operation mode	System status	stPriorityEn.bpLT	stPriorityEn.bEnSfty	stPriorityEn.bEnCrit	stPriorityEn.bPgm
E_BA_AC_OpMod01.eOff	1	Off	Plant shutdown	FALSE	FALSE	FALSE	TRUE
E_BA_AC_OpMod01.eOn	2	On	Plant startup	TRUE	FALSE	FALSE	TRUE
E_BA_AC_OpMod01.eEmergency	3	Emergency	Plant shutdown	FALSE	FALSE	TRUE	FALSE
E_BA_AC_OpMod01.eFrost	4	Frost	Plant shutdown	FALSE	FALSE	TRUE	FALSE
E_BA_AC_OpMod01.eSmokeExtractionProgram	5	Smoke extraction program	Plant startup	TRUE	TRUE	FALSE	FALSE
E_BA_AC_OpMod01.eSmokeExtractionSupplyAir	6	Smoke extraction supply air	Plant startup	TRUE	TRUE	FALSE	FALSE
E_BA_AC_OpMod01.eSmokeExtractionExhaustAir	7	Smoke extraction exhaust air	Plant startup	TRUE	TRUE	FALSE	FALSE
E_BA_AC_OpMod01.eFire	8	Fire	Plant shutdown	FALSE	TRUE	FALSE	FALSE
E_BA_AC_OpMod01.eNightCooling	9	Night cooling	Plant startup	TRUE	FALSE	FALSE	TRUE
E_BA_AC_OpMod01.eCoolDownProtection	10	Support operation, cooling protection	Plant startup	TRUE	FALSE	FALSE	TRUE
E_BA_AC_OpMod01.eOverHeatingProtection	11	Overheating protection	Plant startup	TRUE	FALSE	FALSE	TRUE
E_BA_AC_OpMod01.eAlarm	12	Fault	Plant shutdown	FALSE	FALSE	TRUE	FALSE
E_BA_AC_OpMod01.eForcedVentilation	13	Forced ventilation	Plant startup	TRUE	FALSE	TRUE	FALSE
E_BA_AC_OpMod01.eCentralSwitchOff	14	Central shutdown	Plant shutdown	FALSE	FALSE	TRUE	FALSE

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

Block diagram

Principle diagram

The diagram shows the integration of the template within a plant.

Syntax

FUNCTION_BLOCK FB_BA_AC_EnPrio
VAR_INPUT
  eOpMode          : E_BA_AC_OpMod01;
END_VAR
VAR_OUTPUT
  stPriorityEn     : ST_BA_PriorityEn;
END_VAR
VAR
  PrioSwiPlt       : FB_BA_MMUX_B24;
  PrioSwiSfty      : FB_BA_MMUX_B08;
  PrioSwiCrit      : FB_BA_MMUX_B08;
  PrioSwiPgm       : FB_BA_MMUX_B08;
END_VAR

Inputs

Name	Type	Description
eOpMode	E_BA_AC_OpMod01	Input of the current operation mode eOpMode.

Outputs

Name	Type	Description
stPriorityEn	ST_BA_PriorityEn	Output of the current command structure stPriorityEn. This includes the system enable for the step sequence control of an air conditioning system and the associated enables for the priorities "Safety", "Critical" and "Program".

Variables

Name	Type	Description
PrioSwiPlt	FB_BA_MMUX_B24	The multiplexer uses the plant operation mode eOpMode to define the system enable for controlling the aggregates of a plant.
PrioSwiSfty	FB_BA_MMUX_B08	The multiplexer uses the plant operation mode eOpMode to define the enable of the priority "Safety" for controlling the aggregates of a plant.
PrioSwiCrit	FB_BA_MMUX_B08	The multiplexer uses the plant operation mode eOpMode to define the enable of the priority "Critical" for controlling the aggregates of a plant.
PrioSwiPgm	FB_BA_MMUX_B08	The multiplexer uses the plant operation mode eOpMode to define the enable of the priority "Program" for controlling the aggregates of a plant.

Requirements

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