| Name |
SNVT type |
in/ out |
normal connection |
| nciNetConfig | SNVT_config_src | in | when set TRUE disables inbuilt binding |
| nciLocation | SNVT_str_asc | in | node label string.. application updates it when address changed |
| nviConfigPara | single byte parameter number | in | used to read config parameter, node replies
with data in SeaChange data structure |
| nviClock | SNVT_date_time | out | connected to nviClock on all registered modules (group broadcast) |
| nviDayofWeek | SNVT_date_day | out | connected to nviDayofWeek on all registered modules (group broadcast) |
| nvoAhuOutTemp | SNVT_temp | out | connected to nviOutsideTemp on all registered modules (group broadcast) |
| nvoBoilerTemp | SNVT_temp | out | reserved for future use |
| nvoInstallZone | SNVT_lev_cont | out | used to confirm registration allocation |
| nviHeatTrim | SNVT_lev_cont | in |
heat demand from Master AHU or Zone Controller |
| nvoSetDay | SNVT_date_day | out |
connected to nviSetDay on Boiler Controller set day of week on Boiler Controller |
| nvoSetTime | SNVT_date_time | out |
connected to nviSetTime on Boiler Controller set real time clock |
| nvoConstTempSP | SNVT_temp | out | connected to nviConstTempSP on Boiler controller. Sets a minimum flow temperature setpoint for Hot water circuits or Constant temperature heating circuits |
| nviCoolTrim | SNVT_lev_cont | in | cool demands from Master AHU or Zone controller |
| nviOccupancy | SNVT_occupancy | in | Occupancy from Zone or another AHU |
| nvoOccupancy | SNVT_occupancy | out | current Occupancy state |
| nvoZoneHeatOp | SNVT_lev_cont | out | connected to nviHeatTrim on an Actuator controller |
| nvoZoneCoolOp | SNVT_lev_cont | out | connected to nviCoolTrim on an Actuator controller |
| nvoAHUstructOp | SeaChange structure ahu_op | out | AHU data to sub modules |
| nviPreHeatStatus | SeaChange structure ahp_op | in | Interlock data from preheater, mixing damper, fan changeover controllers |
| nvoHeatTrim | SNVT_lev_cont | out |
heat demand % to heat source |
| nvoCoolTrim | SNVT_lev_cont | in |
cool demand % to cool source |
| nviOutsideTemp | SNVT_temp_p | in | Outside temperature connected to optional networked sensor |
| nviOutsideRH | SNVT_lev_percent | in | Outside Relative Humidity connected to optional networked sensor |
| nviSpaceTemp | SNVT_temp_p | in | Space or Return Air temperature connected to optional networked sensor |
| nviSpaceRH | SNVT_lev_percent | in | Space or Return Air Relative Humidity connected to optional networked sensor |
| nviSupplyTemp | SNVT_temp_p | in | Supply Air temperature connected to optional networked sensor |
| nviSupplyRH | SNVT_lev_percent | in | Supply Air Relative Humidity connected to optional networked sensor |
| nviSetPoint | SNVT_temp_p | in | Occupied setpoint, changes EEPROM value so update rate needs to be carefully considered |
| nvoSetPtOffset | SNVT_temp_p | in | Occupied Setpoint trim, allows setpoint of each AHUl to be indiviually trimmed |
| nvoEffectSetPt | SNVT_temp_p | out | current setpoint |
| nvoSpaceTemp | SNVT_temp_p * | out | current return air temperature |
| nvoSupplyTemp | SNVT_temp_p * | out | current supply air temperature |
| nvoOutsideTemp | SNVT_temp_p * | out | current outside air temperature |
| nvoOutsideRH | SNVT_lev_percent * | out | current outside RH |
| nvoHeatOutput | SNVT_lev_percent * | out | Heating Demand |
| nvoCoolOutput | SNVT_lev_percent * | out | Cooling Demand |
| nvoDigIn | single byte | out poll |
Eight status signals, one per bit Frost; Occupied; heat relay 1; heat relay 2; cool relay 1; cool
relay 2; supply fan; extract fan |
| nvoSwitch | single byte | out poll |
Status of eight switches one per bit Automatic; Override; spare; spare; spare; spare; spare; Config mode |
| nviSwitch | single byte | in | Writes to eight switches one per bit as above |
| nviPlotRequest | SeaChange plot request | in | proprietory data structure |
| nviClock | SNVT_date_time | in | receive time updates from other system masters for time syncronisation |
| nciSndHrtBt | SNVT_time_sec | in | heartbeat setting for update time of SNVT values marked with a * |