Orion System PT-Link II LON - Manual (Page 28)

PT-Link II LON ® Technical Guide
PT-Link II Interface 28
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
High Coil
Temperature
Setpoint
Limit
HiClTpSt Analog
Input
This is the
highest that the
Coil Tem-
perature will be
reset to during
Space Humid-
ity Reset of the
Coil Suction
Temperature
Setpoint. If no
coil tem-
perature reset
is required, this
value should be
set the same as
the Low Coil
Temperature
Setpoint.
35 70
Low Coil
Temperature
Setpoint
Limit
LoClTpSt Analog
Input
This is the low-
est that the Coil
Temperature
will be reset to
during Space
Humidity Reset
of the Coil Suc-
tion Tempera-
ture Setpoint.
If no coil tem-
perature reset
is required, this
value should be
set the same as
the High Coil
Temperature
Setpoint.
35 70
Compressor
Discharge
Temperature
DschgTp Analog
Output
Current value
of the Compres-
sor Discharge
Temperature
Sensor.
Bad Compres-
sor Discharge
Sensor
DschgAlm Binary
Output Failure of
the Digital
Compressor
Discharge
Temperature
Sensor.
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
Control Mode CtrlMod Analog
Output
1=Constant
Volume
2=Supply Air
Cooling Only
3=Outdoor
Temp Control
4=Single Zone
VAV
5=Supply Air
Tempering
6=Space Temp
Control w/
High OA
Content
Unoccupied
Control Tem-
perature Cool-
ing Failure
CtrlTpCF Binary
Output Activated if the
control temper-
ature does not
get within 5°F
to the occupied
cooling setpoint
in an hour in
the cooling
mode. This
alarm is not
used in 100%
outside air units
or supply air
control.
Control Tem-
perature Heat-
ing Failure
CtrlTpHF Binary
Output Activated if the
control temper-
ature does not
get within 5°F
to the occupied
heating setpoint
in an hour in
the heating
mode. This
alarm is not
used in 100%
outside air units
or supply air
control.
High Control
Mode Tem-
perature
HiCtrlMd Binary
Output Occurs when
the Control-
ling Sensor
Temperature
rises above the
Cooling Mode
Enable Setpoint
plus the Control
Mode High
Alarm Offset.
Applies only to
Space or Return
Air Tempera-
ture controlled
units.
Revised 7/7/14