Orion System BACnet Link - Manual (Page 15)

BACnet® Link Interface
Technical Guide
15
Object Properties For The VAV/CAV Controller
Property Name Property Data Type
Property
Identifier Read
Or
Write
Alarm_Status VavAlarmBits 1024 R/O
Application_Software_Version Unsigned 11 R/O
CO2_Setpoint Real 1094 R/O
Control_Status VavControlBits 1025 R/O
Control_Temperature Real 1028 R/O
Cooling_Setpoint Real 1027 R/O
Duct_Static_Pressure Real 1090 R/O
Duct_Static_Setpoint Real 1031 R/W
Economizer_Position Real 1032 R/O
Fan_Speed_Unit BACnetEngineeringUnits 1083 R/O
Heating_Setpoint Real 1037 R/O
Humidity_Unit BACnetEngineeringUnits 1084 R/O
Min_Outside_Air_Setpoint Real 1091 R/W
Object_Identifier BACnetObjectIdentifier 75 R/O
Object_Name CharacterString 77 R/W
Object_Type WattBacObjectTypes 79 R/O
Occupied_Cooling_Setpoint Unsigned 1039 R/W
Occupied_Heating_Setpoint Unsigned 1040 R/W
Outdoor_Air_Humidity Real 1050 R/O
Outdoor_Air_Sensor_Offset Real 1051 R/W
Outdoor_Air_Temperature Real 1052 R/O
Outdoor_Air_Wetbulb Real 1053 R/O
Position_Unit BACnetEngineeringUnits 1085 R/O
Relays VavRelayBits 1055 R/O
Relief_Pressure Real 1056 R/O
Relief_Pressure_Setpoint Real 1092 R/W
Return_Air_CO2_Level Real 1093 R/O
Return_Air_Sensor_Offset Real 1058 R/W
Return_Air_Temperature Real 1057 R/O
Schedule_Force WattBacScheduleState 1059 R/W
Space_Sensor_Offset Real 1063 R/W
Space_Temperature Real 1064 R/O
Staging_Deadband Integer 1067 R/W
Supply_Air_Cooling_Setpoint Unsigned 1068 R/W
Supply_Air_Heating_Setpoint Unsigned 1069 R/W
Supply_Air_Sensor_Offset Real 1071 R/W
Supply_Air_Temperature Real 1073 R/O
Temperature_Demand Real 1074 R/O
Temperature_Unit BACnetEngineeringUnits 1086 R/O
Unoccupied_Coolting_Setpoint Unsigned 1075 R/W
Unoccupied_Heating_Setpoint Unsigned 1076 R/W
Vfd_Blower_Fan Real 1077 R/O
Vfd_Exhaust_Fan Real 1078 R/O
Warm_Up_Setpoint Unsigned 1079 R/W
Wetbulb_Setpoint Unsigned 1080 R/W
Table 8: VAV/CAV Object Properties
VAV/CAV Object
The information that follows describes the characteristics of the VAV/
CAV Object. The properties for the VAV/CAV Object are listed in Table
8.
Object Name
The Object Name for the VAV/CAV controller is a 15 byte character
string that can be set through the BACnet
® front end.
Object Type
The Object Type of the VAV/CAV controller is VavCav or 257.
Object Instance Number
The Instance Number of the VAV/CAV Object is determined by two
variable values. The first variable is the loop address setting on the
BACnet
® Link for the specific loop the VAV/CAV controller resides on
and the second is the VAV/CAV controller address. The BACnet ® Link
loop address can be either 0, 1, 2 or 3. See Figure 3 at the front of this
manual for detailed information on the BACnet
® Link loop address
jumper settings.
The second variable value used to calculate the Object Instance number
is the VAV/CAV controller address and is determined by the address
switch settings on the VAV/CAV controller. Valid address settings are 1
through 16.
See Table 10 at the end of this chapter for complete Object Instance
Number calculation information
Object Properties
The information and tables that follow detail the properties and prop-
erty identifiers for the VAV/CAV Object.