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Beckhoff Building Automation 04/21/23 1
New Automation TechnologyNew Automation Technology
HVAC-Library Exercise Air Conditioning System
Beckhoff Building Automation 04/21/23 2
Air Conditioning System with 1 Speed Fans, Air Heating, Air Mixing and Air Cooling.
The room temperature is controlled via a cascade from a room PID and an sequence from supply Air PID-controllers.
The Supply Air temperature can be limited from the Master Controller in the Cascade.
If freeze protection is detected the fans will be stopped, the heating valve will be opened and the heat pump will run.
The plant is equipped with a summer night cooling, cool down protection and over heating protection program.
The Pump is running if the heater valve is opened more than 3%.
The pump and the heater valve have an anti blocking program to prevent sticking after long downtimes.
The running times from the plant can adjusted with a weekly scheduler. The weekly scheduling is combined with an calendar for Holiday an special days.
HVAC-Library Exercise Air Conditioning System
Beckhoff Building Automation 04/21/23 3
Supply Air
Ycooling
Mixingheating
T
TT
2
T
room
PID
Mixing
PID
PID
T
1
Kühlen
Sw
321
ot<ret_T ot>ret_T
T
3
Heizen
PID
HVAC-Library Exercise Air Conditioning System
Beckhoff Building Automation 04/21/23 4
Programming Step 1 (creating plant folder)
Creating a plant folder before importing the macros.
HVAC-Library Exercise Air Conditioning System
Beckhoff Building Automation 04/21/23 5
The next step is to import the groups from the folder :\EXP_Files\Groups
Procedure:
1. Open File with notepad
2. checking plant naming and if necessary modify with find and replace all.
3. Saving File
4. Importing macro
Programming Step 2 (importing macros)HVAC-Library Exercise Air Conditioning System
AC02AC02
AC01
Beckhoff Building Automation 04/21/23 6
The following groups ore sub programs must be imported: Main program for calling all sub programs from the plant.
MAINPROGAM_AIR_CONDITIONING.EXP Temperature Sensors AC-Plant:
TEMPERATURE_SONSORS_AC_PLANT.EXP Supply and Return Air Fan:
FANS_1SPEED_Ventilation_Air_Conditioning.EXP Setpoint calculation with master PID and summer compensation:
Setpoint calculation for Room and Supply Temperature cascade.EXP Cooler with PID and control valve:
COOLER.EXP.EXP Air Mixing with PID and damper:
AIR MIXING.EXP AC-Plant start program:
X_StartAC Return air and supply air filter:
FilterGuard_X_Filter.EXP Selection of all errors which must turn of the AC-Plant
ERRORCOLLECTION_AC.EXP
Programming Step 2 (importing macros)HVAC-Library Exercise Air Conditioning System
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Pre- Heater with supply air PID, return water temperature, return water PID, heat pump and freeze protection program :PRE HEATER.EXP
Cool Down Protection ProgramCooling_Down_Protection__X_CoolDownProtection.EXP
Time Scheduling Program with Manual Ctrl switchTIMESCHEDULING_1STAGE_CMDCTRL_1STAGE__X_TIMESCHEDUL2ST_CMDCTRL2ST.EXP
Summer Night Cooling ProgramSummerNightCooling__X_NightCooling.EXP
Over Heating Protection ProgramOverheatingProtection__X_OverHeatProtec.EXP
Programming Step 2 (importing macros)HVAC-Library Exercise Air Conditioning System
Beckhoff Building Automation 04/21/23 8
After importing the macros arises the following view.
Programming Step 2 (importing macros)HVAC-Library Exercise Air Conditioning System
Beckhoff Building Automation 04/21/23 9
In the main program AC01 runs all sup programs from the plant:
Programming Step 3 (call from all sub programs)HVAC-Library Exercise Air Conditioning System
Beckhoff Building Automation 04/21/23 10
The main program AC01 is to check if all program calls and links are one.
Programming Step 4 (call from all sub programs)HVAC-Library Exercise Air Conditioning System
Beckhoff Building Automation 04/21/23 11
Programming Step 4 (call from all sub programs)HVAC-Library Exercise Air Conditioning System
The main program AC01 is to check if all program calls and links are done.
Beckhoff Building Automation 04/21/23 12
MAIN must be completed with call from AC01
Programming Step 5 (call from AC01 in MAIN)HVAC-Library Exercise Air Conditioning System
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compile, download, connection with the terminals
Programming Step 6 (compiling)HVAC-Library Exercise Air Conditioning System
Beckhoff Building Automation 04/21/23 14
Additional Exercise:
Ad a second Air Conditioning plant:
Procedure:
1.Export your AC01 to the Export-Folder plants
2.Rename AC01 to AC02, save and import
3.Include an Air/Air Heat exchanger into the AC02.
4.Adjust the Sequence controller (current sequence, number of sequences)
5.Ad the call from the recovery system in AC02
6.Ad the call AC02 in MAIN
After this procedure programming a second plant with a recovery system is done!
Exercise 2 (Programming an addition AC)HVAC-Library Exercises Air Conditioning System
Beckhoff Building Automation 04/21/23 15
Additional Exercise:
Ad a third Air Conditioning plant:
Procedure:
1.Export your AC02 to the Export-Folder plants
2.Rename AC02 to AC03, save and import
3.Delete the folder Energy Recovery
4.Include an recuperation heat exchanger into the AC03.
5.Adjust the Sequence controller (current sequence, number of sequences)
6.Ad the call AC03 in MAIN
After this procedure programming a third plant with a recuperation heat exchanger system is done!
Exercise 2 (Programming an addition AC)HVAC-Library Exercises Air Conditioning System
