Viconics VT7200 (Echelon) Integration Manual - Manual (Page 11)

11
Parameter Variable
Name Function
This network variable input is used to coordinate the Space
Comfort Controller with any node that may need to control the
heat/cool changeover of the unit. This input is overridden by
nviApplicMode, unless nviApplicMode is HVAC_AUTO. If
nviApplicMode is HVAC_AUTO, then nviHeatCool determines the
effective mode of the unit.
Default Null Value: HVAC_AUTO.
This network variable is subject to the receive heartbeat time,
nciRcvHrtBt
Valid Range:
0 = HVAC_AUTO
1 = HVAC_HEAT
2 = HVAC_MRNG_WRMUP – Not Used
3 = HVAC_COOL
4 = HVAC_NIGHT_PURGE – Not Used
5 = HVAC_PRE_COOL – Not Used
6 = HVAC_OFF
7 = HVAC_TEST – Not Used
8 = HVAC_EMERG_HEAT – Not Used
9 = HVAC_FAN_ONLY – Not Used
12 = HVAC_MAX_HEAT – Not Used
Sequence of
operation network input
SNVT_hvac_mode
nviHeatCool
1
See note 1 below
0xFF = HVAC_NUL – Not Used
This network variable input is used to enable or disable user
access to thermostat
Default Null Value: Level 0.
Valid Range:
Level Occupied
Temperature
Setpoints
System
Mode
Settings
Fan Mode
Settings
Unoccupied
Override
0 Yes access Yes access Yes access Yes access
1 Yes access Yes access Yes access No access
2 Yes access No access No access Yes access
3 Yes access No access No access No access
4 No access No access No access Yes access
Remote
Lockout network input
SNVT_count
nviRemLockout
5 No access No access No access No access
This network variable input is used to enable or disable
dehumidification
Default Null Value: Dehumidification not allowed
Set value to 100% for both On & Off state
Valid Range:
State =0 = Dehumidification not allowed
(Thermostat’s default value)
Dehumidificati
on Lockout network input
SNVT_switch
nviDhumiLCK
State = 1 = Dehumidification allowed
This network variable input is used remotely command the
Auxiliary Output (BO5).
NOTE Auxiliary Contact configuration NEEDS to be set to 5 for this
function to operate ( 5 = Output to follow secondary network
occupancy command )
Set value to 100% for both On & Off state
Default Null Value: Auxiliary contact Off
Valid Range:
State = 0 = Auxiliary contact Off (Thermostat’s default value)
Auxiliary
Contact
Remote
Control network input
SNVT_switch
nviAuxOut
State = 1 = Auxiliary contact On