DNT-T221-FCU Application Guide
Page 10 of 30
Software & Programming
Objects
The following is a list of predefined objects that reside in BACstat III products which cannot be created or
deleted. When connected to an MS/TP network, these objects are accessible over the network.
Object
Name
Description
Default Value
DEV<address
>
BACstat<address>
*
Device Object
N/A
AI1
Temperature
Input 1 (10K Thermistor Value)
N/A
AI2
Input 2 *
Input 2 (Interlock Option Input)
N/A
AI3
Input 3 *
Input 3 (Auto Changeover Option Input)
N/A
AV1
Output 1 *
Output 1 (0 – 100%, Name Changes)
In Multispeed Fan/4-Pipe system, the
possible values are 0-3 :
0 – 0%
1 – 40%
2 – 70%
3 – 100%
N/A
AV2
Output 2 *
Output 2 (0 – 100%, Name Changes)
N/A
AV3
Output 3 *
Output 3 (0 – 100%, Name Changes)
N/A
AV4
KeyPress
KeyPress Value
N/A
AV5
External *
External Object Value (i.e., OAT)
In Multispeed Fan/4-Pipe system:
•
Set units to “yr” to use AV28/29 to
display cooling/heating output.
•
Set units to “mth” to disable the
display of cooling/heating output
on AV28/AV29
N/A
AV6
Day Setpoint
Room Setpoint
ºC = 21; ºF = 71; % = 30
AV7
Day Minimum
Minimum Adjustable Day Setpoint
ºC = 18; ºF = 65; % = 20
AV8
Day Maximum
Maximum Adjustable Day Setpoint
ºC = 25; ºF = 77; % = 55
AV9
Day Differential
Room Setpoint Differential
ºC = ±0.5; ºF = ±1, % = ±2.5
AV10
Night Heat Setpoint
Night Setpoint for Heating (or Humidity)
ºC = 16; ºF = 60; % = 30
AV11
Night Cool Setpoint
Night Setpoint for Cooling
ºC = 30; ºF = 86; % = 30
AV12
Application - FCU
Control Application (FCU) Fixed
4
AV13
Alg Mode
Algorithm Mode
0 (Off or Night)
AV14
Controller Status
Status of Internal Control Loop
N/A
AV15
Display Code
Local Display & Button Handling
1237
AV16
AI1 Calibration
Input 1 Calibration (Temperature)
0.0
AV17
AI2 Calibration
Input 2 Calibration (MUXed IP)
0.0
AV18
AI3 Calibration
Input 3 Calibration
0.0
AV19
Proportional Band
Control Loop Tuning Parameter
ºC = 1; ºF = 2; % = 10
AV20
Reset Rate
Control Loop Tuning Parameter
1.0
AV21
Output 1 Config
Output 1 Configuration Variable
As per Application Setup
AV22
Output 2 Config
Output 2 Configuration Variable
As per Application Setup
AV23
Output 3 Config
Output 3 Configuration Variable
As per Application Setup
AV24
FCU 2 Pipe Mode
0=Clg 1=Htg 2=Auto Clg 3=Auto Htg
As required
AV25
Min Fan Speed
%
10%
AV26
Manual Fan Stg
Off, Lo, Md, Hi
As required
AV27
Fan Ramp Rate
% per minute
10%
