PT-Link-LON
®
Technical Guide
PT-Link Interface
22
Appendix C - VCM-X Modular and WSHP LON Parameters
SNVTs for the VCM-X Modular
Binary Output SNVTs are SNVT_lev_disc
all other SNVTs are SNVT_count_inc_f
Parameter
Name
Object
Description
Limits
Modulating
Compressor 2
MdCmp2
Analog
Output
Current position
of the 2nd Stage
of Compressor
Modulation.
Head
Pressure 1
HdPr1
Analog
Output
Head Pressure for
1st Compressor
Head
Pressure 2
HdPr2
Analog
Output
Head Pressure for
2nd Compressor
Condenser
Fan 1
CdFan1
Analog
Output
Condenser Fan 1
Signal Status
Condenser
Fan 2
CdFan2
Analog
Output
Condenser Fan 2
Signal Status
SNVTs for the VCM-X WSHP (Tulsa)
Binary Output SNVTs are SNVT_lev_disc
all other SNVTs are SNVT_count_inc_f
Parameter
Name
Object
Description
Modulating
Compressor 2
MdCmp2
Analog
Output
Current position of the
2nd Stage of Compressor
Modulation.
Head Pressure 1
HdPr1
Analog
Output
Head Pressure for
1st Compressor
Head Pressure 2
HdPr2
Analog
Output
Head Pressure for
2nd Compressor
Condenser Fan 1
CdFan1
Analog
Output
Condenser Fan 1
Signal Status
Condenser Fan 2
CdFan2
Analog
Output
Condenser Fan 2
Signal Status
Water Temp. A
WaterTpA
Analog
Output
Current water
temperature of refrigerant for
System A.
Water Temp. B
WaterTpB
Analog
Output
Current water
temperature of refrigerant for
System B.
SNVTs for the VCM-X WSHP (Tulsa)
Binary Output SNVTs are SNVT_lev_disc
all other SNVTs are SNVT_count_inc_f
Parameter
Name
Object
Description
Compressor A1
Low Suction
Pressure Alarm
A1LSPAlm
Binary
Output
Alarm that indicates
Suction Pressure for
Compressor A1 is below the
Low Suction Pressure Cooling
(Heating) Setpoint.
Compressor A1
Lockout Alarm
A1LktAlm
Binary
Output
Alarm that indicates
Compressor A1 is locked out.
Compressor A2
Low Suction
Pressure Alarm
A2LSPAlm
Binary
Output
Alarm that indicates
Suction Pressure for
Compressor A2 is below the
Low Suction Pressure Cooling
(Heating) Setpoint.
Compressor A2
Lockout Alarm
A2LktAlm
Binary
Output
Alarm that indicates
Compressor A2 is locked out.
Compressor B1
Low Suction
Pressure Alarm
B1LSPAlm
Binary
Output
Alarm that indicates
Suction Pressure for
Compressor B1 is below the
Low Suction Pressure Cooling
(Heating) Setpoint.
Compressor B1
Lockout Alarm
B1LktAlm
Binary
Output
Alarm that indicates
Compressor B1 is locked out.
Compressor B2
Low Suction
Pressure Alarm
B2LSPAlm
Binary
Output
Alarm that indicates
Suction Pressure for
Compressor B2 is below the
Low Suction Pressure Cooling
(Heating) Setpoint.
Compressor 4
Lockout Alarm
B2LktAlm
Binary
Output
Alarm that indicates
Compressor B2 is locked out.
Low Water
Temperature 1
Alarm
LWT1Alm
Binary
Output
Alarm that indicates water
temperature is below the
Leaving Water Safety Setpoint
(Heating only) for System A.
Low Water
Temperature 2
Alarm
LWT2Alm
Binary
Output
Alarm that indicates water
temperature is below the
Leaving Water Safety Setpoint
(Heating only) for System B
Proof of Water 1
Flow Alarm
POWF1Alm
Binary
Output
Alarm that indicates no Proof
of Water Flow for System A
(A1/A2)
Proof of Water 2
Flow Alarm
POWF2Alm
Binary
Output
Alarm that indicates no Proof
of Water Flow for System B
(B1/B2)
Module
Communications
Alarm
ComMAlm
Binary
Output
Alarm that indicates that one
or more Modules are not
communicating with the
VCM-X WSHP Controller.
NOTE:
The following points for the VCM-X Modular and VCM-
X WSHP Controllers are additional points. All points and
property identifi ers in the VCM-X Controller table (pages
21-26) also apply to the VCM-X Modular and VCM-X
WSHP Controllers.