Orion System PT-Link II LON - Manual (Page 32)

PT-Link II LON ® Technical Guide
PT-Link II Interface 32
Appendix C - VCB-X LON Parameters
SNVTs for the VCB-X Controller
Binary Output SNVTs are SNVT_lev_disc
all other SNVTs are SNVT_count_inc_f
Parameter Name Object Description Limits
Heat Staging
Window
HtStgWdw Analog
Input
In the Heating
Mode, if the
Supply Air
Temperature
rises above the
Active Supply
Air Heating
Setpoint plus
the Heating
Stage Off
Window value,
a Heating stage
will be deacti-
vated after its
Minimum Run
Time.
1 50
Mechani-
cal Heating
Lockout
MchHtLkt Analog
Input
The VCB-X
will Lockout
Mechanical
Heating when
the Outdoor Air
Temperature
is above this
Setpoint.
-30 150
Mechanical
Heating Alarm
MchHtAlm Binary
Output Heating Mode
has been
initiated but
the Supply Air
Temperature has
not risen 5°F
within a user-
adjustable time
period. This
does not This
does not apply
for Modulating
Heating.
Heat Pump
Compressor
Heating
Outdoor
Lockout
HpLkt Analog
Input
Compressor
Heating will
be locked
out when the
Outdoor Air
Temperature
is below this
Setpoint.
-30 100
Heat Pump
Defrost
Interval
HpDfrInt Analog
Input
The Heat Pump
Defrost Interval
is the length of
time that must
be met between
Defrost Modes.
10
Min
120
Min
Heat Wheel
Defrost
Setpoint
Dfrst Analog
Input
The unit will
go into Heat
Wheel Defrost
Mode when the
Outdoor Air
is below this
setpoint.
0 50
Revised 7/7/14
SNVTs for the VCB-X Controller
Binary Output SNVTs are SNVT_lev_disc
all other SNVTs are SNVT_count_inc_f
Parameter Name Object Description Limits
Indoor
Humidity
InRh Analog
Output
Current value
of the indoor
humidity
sensor.
Indoor
Humidity
Setpoint
InRhSt Analog
Input
If Coil Temp
Reset is being
used this is
also the lowest
Space RH value
that
corresponds
to the Hi Coil
Temp Setpoint.
0 100
High Indoor
Humidity
Reset Limit
HiInRh Analog
Input
During Coil
Temp Reset,
this is the high-
est Space RH
value that
orresponds to
the Low Coil
Temp Setpoint.
0 100
Indoor
Humidity
Setpoint
Mirror
InRhStM Analog
Output
Mirror of the
InRhSt “read
only.”
Leaving Water
Temperature
LvWtrTp Analog
Output
Leaving Water
Temperature
Value
Low
Ambient
Relay
Setpoint
LWAmbnt Analog
Input
Temperature at
which the Low
Ambient Relay
will activate in
the Occupied
or Unoccupied
Mode.
-30 70
Mode Select
Deadband
MdSelDb Analog
Input
This Setpoint
is added to
and subtracted
from the HVAC
Mode Setpoints
to determine
when the unit
enters and
leaves a mode
of operation.
1 10
Modulating
Cooling
Position
MdClPos Analog
Output
Current
position of the
modulating
cooling signal
(Chilled water
or digital
compressor).
Modulating
Gas Valve
Position
MdGs
VPos
Analog
Output
Current posi-
tion of
MODGAS
modulating gas
valve control.