Orion System PT-Link II BACnet2 - Manual (Page 34)

PT-Link II BACnet ® Technical Guide
PT-Link II Interface 34
Appendix D - VCB-X BACnet Parameters
BACnet Properties for the VCB-X Controller
Parameter Name Object Description Limits
Low Coil
Temperature
Setpoint
LoClTpSt AV:295 This is the
lowest that the
Coil
Temperature
will be reset to
during Space
Humidity Reset
of the Coil
Suction
Temperature
Setpoint.
Produces a
dewpoint in
the supply air
approximately
10˚F above this
setpoint.
35 70
Condenser
Control Signal
CdCtrSg1 AI:280 Condenser Fan
Signal 1 Status.
Control Status CtrlSts AI: 4 Current
operational
status.
See Control
Status Bits on
page 39.
Control
Temperature
CtrlTp AI: 9 Current value
of the control
temperature
sensor.
Cooling
Enabled ClEnbl AI: 6 Status that
indicates
mechanical
cooling is
enabled.
Cooling
Setpoint
Mirror
ClSt AI: 7 Occupied
Cooling Mode
Enable
Setpoint Mirror.
Dewpoint
Setpoint
RhDewpSt AV:282 On a MUA unit,
if the outdoor
dewpoint rises
above this
setpoint, the
unit will
activate Dehu-
midifi cation.
35 80
Economizer
Enabled
EcoEnbl AI: 15 Status that
indicates
the economizer
is enabled.
Economizer
Enable
Setpoint
EcoEnbSt AV:283 The economizer
is enabled if the
outdoor dry-
bulb, dewpoint,
or wetbulb
temperature
falls below this
setpoint.
-30 80
Economizer
Position
EcoPos AI: 16 Current
position of the
economizer
damper.
BACnet Properties for the VCB-X Controller
Parameter Name Object Description Limits
Minimum
Economizer
Position
MinEcoSt AV: 151 This is the
minimum
position of the
economizer in
the occupied
mode.
0 100
Force
Economizer
FrcEcono AV: 267 Overrides all
other Outdoor
Air Damper
position com-
mands so as to
maintain this
fi xed position.
Confi guring
for “Auto” will
restore normal
unit control of
the Outdoor
Air Damper/
Economizer
operation.
0% 100%
Auto=65535
Exhaust Fan
CFM
EtCFM AI:194 Current
Exhaust
Airfl ow
Measurement
Exhaust Fan
Speed
EtFnSpd AI: 273 Current
position of the
VFD relief
fan signal.
Fan
Starting Delay
FanDly AI: 25 Indicates the
current fan
status related
to request to
run, fan starting
delay or POF
failure.
0=No Request
1=Fan
Running
2=Fan Start
Delay
3=POF Failure
Force HVAC
Mode
FrcHvacM AV: 262 Overrides
normal control-
ler operation in
order to force
the unit into
this desired
mode. Con-
fi guring for
“Auto” will
restore normal
unit control of
the mode of
operation.
0=Auto
1=Vent
2=Cool
3=Heat
4=Vent
Dehum.
5=Cool
Dehum.
6=Heat
Dehum.
Head
Pressure
HeadPr AI:276 Current value
of the Head
Pressure
Reading.
Head
Pressure
Setpoint
HeadPrSt AI:279 Current Head
Pressure
Setpoint.
Revised 1/20/12