PT-Link Interface
PT-Link-LON
®
Technical Guide
27
Appendix D - VCM-X LON Parameters
SNVTs for the VCM-X Controller
Binary Output SNVTs are SNVT_lev_disc
all other SNVTs are SNVT_count_inc_f
Parameter
Name
Object
Description
Limits
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
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
Enabled
HtEnbl
Binary
Output
Status that
indicates that
mechanical heating
is enabled.
High
Supply Air
Temperature
Alarm
HiSaAlm
Binary
Output
The Supply Air
has risen above
the Hi SAT Cutoff
Setpoint. Heating
stages begin to deac-
tivate and the fan
continues to run.
Low Supply
Air
Temperature
Alarm
LoSaAlm
Binary
Output
The Supply Air has
fallen below the Hi
SAT Cutoff Setpoint
and cooling stages
will begin to deacti-
vate. If the unit is in
Economizer, Vent,
or Heating Mode
the Supply Fan will
shut off.
MODGAS
II
Connected
MdHt2Ins
Binary
Output
Status that indicates
the MODGAS II
controller is
connected.
Proof of
Flow
Confi gured
PofCfg
Binary
Output
Status that indicates
the proof of fl ow
function has been
confi gured.
REHEAT II
Connected
Rt2Ins
Binary
Output
Status that indicates
the MHGRV
controllers is
connected to the
system.
SNVTs for the VCM-X Controller
Binary Output SNVTs are SNVT_lev_disc
all other SNVTs are SNVT_count_inc_f
Parameter
Name
Object
Description
Limits
Mechanical
Cooling
Alarm
MchClAlm
Binary
Output
Compressor Relays
are enabled but
the Supply Air
Temperature has
not fallen 5°F w/in
a user-adjustable
time period. This
does not indicate
compressors are
active and will not
shut the unit down.
Mechanical
Heating
Alarm
MchHtAlm
Binary
Output
Heating Mode has
been initiated but
the Supply Air
Temperature has
not risen 5°F w/in
a user-adjustable
time period. This
does not indicate
heat stages are
active and will not
shut the unit down.
Dirty Filter
Detected
DrtFlAlm
Binary
Output
Alarm that indicates
the fi lters are dirty.
Control
Temperature
Cool Failure
CtrlTpCF
Binary
Output
This alarm is
activated if the
control temperature
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
Temperature
Heat Failure
CtrlTpHF
Binary
Output
This alarm is
activated if the
control temperature
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.
Outdoor Air
Temperature
Lost
OaTpAlm
Binary
Output
Alarm that
indicates a failure
in the outdoor air
temperature.
Smoke
Detected
Alarm
SmokeAlm
Binary
Output
Alarm that indicates
the Smoke sensor
has been activated.
Space
Temperature
Sensor Lost
SpcTpAlm
Binary
Output
Alarm that indicates
a failure in the
space temperature
sensor.