Danfoss AK-CC 550 - Heating Function and Data Communication

AK-CC 550 Manual RS8EN502 © Danfoss 02-2010 11
Data communication
Thecontrollerhasxedbuilt-inMODBUSdatacommunication.
Ifthereisarequirementforadierentformofdata
communication,aLonRS485modulecanbeinsertedinthe
controller.
TheconnectionmustthenbetoterminalRS485.
(TouseaLonRS485moduleandgatewaytypeAKA245the
modulemustbeVersion6.20orhigher.)
Display
Thecontrollerhasoneplugforadisplay.HeredisplaytypeEKA
163BorEKA164B(max.length15m)canbeconnected.
EKA163Bisadisplayforreadings.
EKA164Bisbothforreadingsandoperation.
The connection between display and controller may be with a
cable which has a plug at both ends.
Ifthedistancebetweendisplayandcontrollerisgreaterthan15
m,theconnectionmusttakeanotherform.
An extra module must also be mounted in the controller if data
communication is used.
Thebuilt-inMODBUSdatacommunicationisusedsothatthe
display connection and the data communication to the other
controllersmusttakeplaceviaamodule.Themodulecanbe:
LonRS485orMODBUS.
Whenadisplayistobeconnectedtothebuilt-inMODBUS,the
displaycanadvantageouslybechangedtooneofthesametype,
butwithIndexA(versionwithscrewterminals).
Ifconnectionoftwodisplaysisrequired,onemustbeconnected
totheplug(max.15m)andtheothermustthenbeconnectedto
thexeddatacommunication.
Important
AllconnectionstothedatacommunicationMODBUSandRS485
must comply with the requirements for data communication
cables. See literature: RC8AC.
Override
Thecontrollercontainsanumberoffunctionswhichcanbeusedtogetherwiththeoverridefunctioninthemastergateway/system
manager.
Function via data communication Function in gateway/system manager Used parameters in AK-CC 550
Start of defrosting Defrostcontrol/Timeschedule/Defrostgroup --- Def start
Coordinated defrost Defrostcontrol/Defrostgroup ---HoldAfterDef/---DefrostState
Preventdefroststart --- Disable Def
Day/Nightschedule Day/Nightcontrol/Timeschedule/Lightzone ---Nightsetback
Lightcontrol Day/Nightcontrol/Timeschedule O39lightRemote
Forcedclosing ForcedClose/InjectionON/AKCON ---Forcedcl.
Forcedcooling ---Forcedcool
Railheatlinktodewpoint /Enhancedrailheat --- Dew point
P0optimization P0Optimization ThecontrollersupportsP0optimization
Adaptivedefrost /Adaptivedefrost.Systemmanageronly - - - Tc TempMean