Orion System PT-Link II LON - Manual (Page 36)

PT-Link II LON ® Technical Guide
PT-Link II Interface 36
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
Current
Supply Air
Temperature
Setpoint
SaTpStM Analog
Output
Current SAT
Cooling or
Heating
setpoint if there
is no reset
source;
Current
calculated SAT
setpoint with
Reset Source.
Cooldown
Mode Supply
Air Setpoint
SaCldnSt Analog
Input
Cooling will be
controlled to
this Supply Air
Setpoint during
Cool-Down.
30 80
Missing Sup-
ply Air CFM
Sensor
SaCfmSr Binary
Output Indicates the
Supply Air
CFM Sensor is
not detected.
Warmup
Mode Supply
Air Setpoint
SaWmupSt Analog
Input
Heating will be
controlled to
this Supply Air
Setpoint during
Morning Warm-
Up.
40 240
SZ VAV Inte-
gral Constant
SZVAVFnl Analog
Input
This is the In-
tegral Constant
for controlling
the SZ VAV
Fan Speed.
0 10
Title 24
Economizer
Feedback
T24EcFb Analog
Output
Current posi-
tion of feedback
from Econo-
mizer actuator.
Title 24
Sensor Alarm
T24TpAlm Binary
Output Outside Air
or Supply Air
Temperature
Sensor is
shorted or miss-
ing.
Title 24 Not
Economiz-
ing When It
Should
T24NEWS Binary
Output Economizer is
enabled but not
following the
desired Econo-
mizer position
commanded.
Title 24
Economiz-
ing When It
Should Not
T24EWISN Binary
Output Economizer is
not enabled but
the feedback
signal indicates
a position more
open than the
minimum.
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
Title 24
Damper
Failure
T24DpAlm Binary
Output Economizer is
enabled but not
within 10% of
desired position
within 150
seconds.
Title 24 Ex-
cess Outdoor
Air
T24ExsOA Binary
Output Economizer
feedback is lost
or Economizer
is not following
commanded
position.
Unoccupied
Cooling
Offset
UnClOst Analog
Input
In Unoccupied
Mode, this
offsets the
Occupied Cool-
ing Setpoint by
this user adjust-
able amount. If
no Unoccupied
Cooling is
desired, use the
default setting
of 30°F for this
setpoint.
0 30
Unoccupied
Heating Offset
UnHtOst Analog
Input
In Unoccupied
Mode, this
offsets the
Occupied Heat-
ing Setpoint by
this user adjust-
able amount. If
no Unoccupied
Heating is
desired, use the
default setting
of 30°F for this
setpoint.
0 30
VFD
Position
VfdBwPos Analog
Output
Current
position of the
VFD blower
fan signal.
Remote VFD
Position
Setpoint
FrcFanSp Analog
Input
Override to
force the VFD
to this
percentage
speed. Confi g-
uring “Auto”
will restore
normal unit
control of the
VFD speed.
0% 100%
Auto=65535
OnBoard
Relay
Status
OnRlys Analog
Output
See page 38.
Revised 7/7/14