Viconics VT7600 Echelon Integration Manual - Manual (Page 7)

7
Input Network Variables (nvi’s) Description
Parameter Variable Name Function
Room
Temperature network input
SNVT_temp_p
nviSpaceTemp This input network variable provides a network remote
temperature value to the thermostat. If a valid value is present,
the internal temperature reading (internal sensor) is no longer
used.
Valid Range: -40 to 122°F (-40 to 50°C)
Default Null (release) Value: 621.81°F (327.67°C or 0x7FFF)
This network variable is subject to the Receive HeartBeat Time,
nviRcvHrtBt.
Outdoor Air
Temperature network input
SNVT_temp_p
nviOutdoorTemp This input network variable provides outdoor air temperature
information to the thermostat from a network value temperature
value. If a valid value is present, the internal temperature
reading (internal sensor) is no longer used. The device will
automatically display the value on its display when used.
Valid Range: -40 to 122°F (-40 to 50°C)
Default Null (release) Value: 621.81°F (327.67°C or 0x7FFF)
This input network variable is used to command the Space
Comfort Controller into different occupancy modes. It is typically
set by a supervisory node to manually control occupancy
modes, or to override the scheduled occupancy.
Default Null Value: OC_NUL = 0xFF
Valid Range:
0 = OC_OCCUPIED
1 = OC_UNOCCUPIED
2 = OC_BYPASS –
Not Used
3 = OC_STANDY – Not Used
Occupancy network input
SNVT_occupancy
nviOccManCmd
0xFF = OC_NUL (Release to internal occupancy)**
* OC_OCCUPIED and OC_UNOCCUPIED commands will
always have full authority over the local occupancy routines
of the thermostat may they be a local input or a PIR cover.
** OC_NUL command will release the thermostat to use its
own internal occupancy routine driven by the local
schedule, one of the digital input or a PIR cover installed on
board.
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.
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
13 = HVAC_ECONOMY – Not Used
14 = HVAC_DEHUMID – Not Used
15 = HVAC_CALIBRATE – Not Used
System
Mode network input
SNVT_hvac_mode
nviApplicMode
0xFF = HVAC_NUL – Not Used