BAC_AC_ColTH_02

Application

The template BAC_AC_ColTH_02 is used for control, supply air temperature control and supply air humidity control of a cold water air cooler.

The template  BAC_AC_ColTH_02 is a call template.

Within the call template the following subtemplates are called and linked with each other:

Interface

BAC_AC_ColTH_02 1:

Plant diagram 01

BAC_AC_ColTH_02 2:

Plant diagram 02

BAC_AC_ColTH_02 3:

Block diagram

BAC_AC_ColTH_02 4:

VAR_INPUT

rSuAT      : REAL;
rSpColT    : REAL;
rSuAX      : REAL;
rSpDehumf  : REAL;
udiPltStp  : UDINT;
udiOpMod   : UDINT;

rSuAT: Measured value of the inlet air temperature

rSpColT: Set value for the inlet air temperature

rSuAX: Calculated value of the absolute inlet air humidity. This value is generated in template BAC_AI_Enthalpy_01.

rSpDehumf: Set value for the absolute inlet air humidity.

udiPltStp: Plant start sequence steps. The plant steps are generated in the system start program BAC_AC_StartTH_01.

udiOpMod: Plant operation mode. The plant operation mode is determined in the mode selection programBAC_AC_OpMod_01.

VAR_OUTPUT

bDeHum      : BOOL;

bDeHum: Dehumidification mode active.
If dehumidification mode is active, energy recovery in heating mode and the preheater are disabled.

Program description

Instance

Type

Task

ColTHPID_T

BAC_AC_ColT_PID_01

Sub template including PID sequence controller for inlet air temperature control.

ColTHPID_H

BAC_AC_ColH_PID_01

Sub template including PID sequence controller for absolute inlet air humidity control.

Vlv

BAC_Uni_Vlv_01_13

Sub template for controlling an analog valve

Version history

Version number

Comments

1.0.0.1

First release