Orion System PT-Link II LON - Manual (Page 55)

PT-Link II Interface
PT-Link II LON ® Technical Guide
55
Appendix G - VCM LON Parameters
SNVTs for the VCM Controller
Binary Output SNVTs are SNVT_lev_disc
All other SNVTs are SNVT_count_inc_f
Parameter Name Object Description Limits
Supply
Air Sensor
Offset
SaTpOst Analog
Input
If the Supply Air
Temperature
Sensor is reading
incorrectly, you can
use this option to
enter an offset
temperature to
adjust the Sensor’s
Temperature.
-100 100
Unoccupied
Cooling
Offset
UnClOst Analog
Input
During the
Unoccupied Mode
of Operation, this
Setpoint spreads
the Occupied
Cooling Setpoint
out by a user
adjustable amount.
If you do not want
Cooling to operate
during the
Unoccupied Mode,
use the default
setting of 30°F for
these setpoints.
0 30
Unoccupied
Heating
Offset
UnHtOst Analog
Input
During the
Unoccupied Mode
of Operation, this
Setpoint spreads
the Occupied
Heating Setpoint
out by a user
adjustable amount.
If you do not want
Heating to operate
during the
Unoccupied Mode,
use the default
setting of 30°F for
these setpoints.
0 30
Dewpoint
Setpoint
DptSt Analog
Input
If the outdoor
dewpoint rises
above this setpoint,
the unit will
activate the
Dehumidifi cation
Demand.
35 80
SNVTs for the VCM Controller
Binary Output SNVTs are SNVT_lev_disc
All other SNVTs are SNVT_count_inc_f
Parameter Name Object Description Limits
Indoor
Humidity
Setpoint
InRhSt Analog
Input
If the indoor
humidity rises
above this setpoint,
the unit will
activate the
Dehumidifi cation
Demand.
0 100
Warm Up
Setpoint
WmupSt Analog
Input
In a VAV
application, upon
entering the
occupied mode, the
Warm-up Demand
will be activated
if the return air
temperature falls
one degree below
this setpoint.
50 90
Wet Bulb
Setpoint
WtblSt Analog
Input
The economizer is
enabled if the out-
door temperature
or wetbulb falls
below this setpoint.
0 80
Bad Supply
Air Sensor
SaTpAlm Binary
Output Alarm that
indicates a failure
in the supply air
sensor.
CO
2
Sensor
Installed
CO2Cfg Binary
Output Status that
indicates the CO
2
function has been
confi gured.
Cooling
Demand
ClDmnd Binary
Output Status that
indicates a demand
for cooling.
Cooling
Enabled ClEnbl Binary
Output Status that indicates
mechanical cooling
is enabled.
Economizer
Enabled
EcoEnbl Binary
Output Status that indicates
the economizer is
enabled.
Fan Start
Up Delay
FanDly Binary
Output Status that indicates
the fan is
commanded to run,
but it is in the start
up delay mode.
Fan
Proving
Alarm
PofAlm Binary
Output Alarm that
indicates a failure
in the fl ow of the
VFD blower.
Heating
Demand
HtDmnd Binary
Output Status that indicates
a demand for
heating.