PT-Link II N2-3 Interface
PT-Link II N2-3
®
Technical Guide
33
Appendix D - SA Controller N2 Parameters
N2 Properties for SA Controller
Parameter
Name
Object
Description
Limits
Control
Status
CtrlSts
AI: 4
Current operational
status.
Occupied
Mode
Enable
Cooling
Setpoint
Mirror
ClSt
AI: 7
Occupied Mode
Enable Cooling
Setpoint Mirror.
Control
Temperature
CtrlTp
AI: 9
Current value of the
control temperature
sensor.
Duct Static
Pressure
DuctPr
AI: 14
Current value of the
duct static pressure
sensor.
Economizer
Position
EcoPos
AI: 16
Current position
of the economizer
damper.
Occupied
Mode
Enable
Heating
Setpoint
Mirror
HtSt
AI: 31
Occupied Mode
Enable Heating
Setpoint
Mirror.
Modulating
Gas Valve
Position
MdHt-
2Pos
AI: 38
Current position
of MODGAS II
modulating gas valve
control.
Reheat
Value
Position
Rt2Pos
AI: 60
Current position of
MHGRV modulating
hot gas reheat valve
control.
Indoor
Humidity
InRh
AI: 67
Current value of
the indoor humidity
sensor.
Space
Temperature
SpcTp
AI: 72
Current value of the
space temperature
sensor.
Current
Supply Air
Setpoint
SaTpStM
AI: 82
Current SAT
Cooling or Heating
setpoint if there is no
reset source;
Current calculated
SAT setpoint with
Reset Source.
Supply Air
Temperature
SaTp
AI: 83
Current value of the
supply air
temperature sensor.
N2 Properties for SA Controller
Parameter
Name
Object
Description
Limits
Temperature
Demand
TpDmnd
AI: 84
Based on the
comparison between
the current Control
Temperature and the
Heating or Cooling
Setpoint Tempera-
tures. Does not work
for supply air control
VFD
Blower Fan
VfdBw-
Pos
AI: 88
Current position of
the VFD blower fan
signal.
Application
Software
Version
AppVer
AI: 99
Current version of the
software in the unit.
Coil
Temperature
Setpoint
CoilTpSt
AI: 107
Current Coil
Temperature
Setpoint.
Dewpoint
Setpoint
Mirror
DptStM
AI: 110
Mirror of the DPtSt
“read only.”
Indoor RH
Setpoint
Mirror
InRhStM
AI: 114
Mirror of the InRhSt
“read only.”
Modulating
Cool
Position
MdClPos
AI: 115
Current position of
the modulating
cooling signal
(Chilled water or
digital compressor).
Modulating
Heat
Position
MdHtPos
AI: 116
Current position of
the modulating
heating signal (hot
water or SCR heat).
Unit Mode
UnitMode
AI: 123
Needed only in
legacy application.
Coil
Temperature
CoilTp
AI: 181
Current coil
temperature reading
added on version
1.09.
Modulating
Compressor
2 Position
MdCmp2
AI: 206
Current position
of the 2nd Stage of
Compressor
Modulation.
Head
Pressure 1
HdPr1
AI: 207
Head Pressure for
1st unit.
Head
Pressure 2
HdPr2
AI: 208
Head Pressure for
2nd unit.
Entering Air
Temperature
EaTp
AI: 235
Temperature of the
air that is
entering the unit.
Entering
Water
Temperature
EwTp
AI: 236
Temperature of the
water that is
entering the unit.
Entering Air
Humidity
EaRh
AI: 237
Relative Humidity of
the Entering Air.
Coil
Temperature
2
CoilTp2
AI: 240
Current Coil
Temperature for 2nd
unit.
NOTE:
When a new setpoint is received from N2, it is main-
tained and used in temporary memory until the unit goes
unoccupied. It is then stored in permanent memory and
will become the new default setpoint even if power is
cycled. Therefore, if power is cycled prior to the unit
going unoccupied, the setpoint will not have been stored
in permanent memory.
NOTE:
Objects labeled AI and BI are read-only. Objects labeled
AO are read/writeable. You cannot write directly to Sensor
Inputs.
