Orion System BACnet Link - Manual (Page 7)

BACnet® Link Interface
Technical Guide
7
Programming - Standard Objects
General Information
The BACnet ® Link provides additional shadowing Analog Input Ob-
jects and Analog Value Objects for read/write parameters of the MUA
II, VAV/CAV and CW/HW controllers.
Note: The BACnet ® Link does not implement any operational
function for the Analog Input Object or the Analog Value
Object but only uses the Current Value property of the
Analog Input/Value Object as a vehicle to convey one
specified parameter of the MUA II, VAV/CAV or CW/
HW controller.
Read Only Parameters are represented by Analog Input Objects and
Setpoint Parameters are represented by Analog Value Objects.
Parameters
Parameters for (1) MUA II controller are represented by 36 Analog
Input/Value Objects.
Parameters for (1) VAV/CAV controller are represented by 52 Analog
Input/Value Objects.
Parameters for (1) CW/HW controller are represented by 54 Analog
Input/Value Objects.
Instance Number Base
Each Analog Input/Value Object has an unique Object Instance Num-
ber Base that can be used to identify which parameter the object repre-
sents. The unique Object Instance Numbers are calculated from for-
mula based on the Instance Number Base which are defined in the tables
that follow.
MUA II Instance Number Base
Instance Number Base For MUA II Controller
Parameter
Instance
Number
Base
Represented
By
Object
Limits
Alarm Status 14 Analog Input
Control Status 12 Analog Input
Cooling Deadband 20 Analog Value 2 20
Current Mode 11 Analog Input
Dew Point Reset Limit 27 Analog Value 40 DP Spt.
Dewpoint Setpoint 22 Analog Value 40 80
Enthalpy Deadband 23 Analog Value 3 20
External Heat Position 15 Analog Input
External Heat Proportion
Band 30 Analog Value 1 30
External Relay Group #1 34 Analog Input
External Relay Group #2 35 Analog Input
External Relay Group #3 36 Analog Input
Heating Deadband 21 Analog Value 2 20
Modulate Gas Valve
Position 17 Analog Input
On Board Relay Group 33 Analog Input
Outdoor Air Cooling
Setpoint 3 Analog Input
Outdoor Air Dew Point 5 Analog Input
Outdoor Air Dew Point
Setpoint 6 Analog Input
Outdoor Air Enthalpy 8 Analog Input
Outdoor Air Enthalpy
Deadband 10 Analog Input
Outdoor Air Enthalpy
Setpoint 9 Analog Input
Outdoor Air Heating
Setpoint 4 Analog Input
Outdoor Air Humidity 7 Analog Input
Outdoor Air Temperature 2 Analog Input
Reheat Value Position 18 Analog Input
Schedule Force 32 Analog Value 0 2
Space Humidity 13 Analog Input
Space Humidity At Max
Supply 28 Analog Value 0 100
Space Humidity At Min
Supply 29 Analog Value 0 100
Space Temperature 16 Analog Input
Space Temperature At
Max Supply 25 Analog Value 40 100
Space Temperature At Min
Supply 26 Analog Value 40 100
Supply Air Reset Limit 24 Analog Value SA
Spt.
SA Spt.
+ 50
Supply Air Setpoint 31 Analog Value 50 90
Supply Air Setpoint Mirror 1 Analog Input
Supply Air Temperature 19 Analog Input
Table 3: Instance Number Base Data For MUA II