SFPTfanCoilUnit

Fan Coil Unit (FCU).  Used to control the room temperature by controlling one heat and one cool actuator output, or a single actuator for heat and cool, and a fan with multiple fan-speed stages.  
 

Network Variables

Configuration Properties

nviSetPoint
nviSpaceTemp
nvoCoolOutput
nvoFanSpeed
nvoHeatOutput

nviApplicMode
nviDischAirTemp
nviEnergyHoldOff
nviFanSpeedCmd
nviOccCmd
nviSetPtOffset
nviWaterTemp
nvoDischAirTemp
nvoEffectSetPt
nvoEnergyHoldOff
nvoLoadAbs
nvoOccCmd
nvoReheat
nvoSpaceTemp
nvoTerminalLoad
nvoUnitStatus

nciSetPnts
nciSndHrtBt

nciLocation
nciMinOutTm
nciNumValve
nciRcvHrtBt

 

Details:

Resource Set: Standard 00:00:00:00:00:00:00:00-0
Index: 36
Obsolete: no
Key: 8020
Inheriting: no


Mandatory Network Variables

nviSpaceTempSpace temperature input.:   Optional input from a sensor node if the fan coil unit controller node itself provides a locally-wired space temperature sensor. 
Member Number: 1
Base type:
SNVT_temp_p
Direction: input
Service: any
Minimum: -10,00
Maximum: 50,00
nviSetPointTemperature setpoint input.:   Allows the temperature setpoint for the occupied and standby mode to be changed via the network. 
Member Number: 2
Base type:
SNVT_temp_p
Direction: input
Service: any
Minimum: 10,00
Maximum: 35,00
nvoHeatOutputHeat control output.:   Current position of the heat actuator; can be used as part of a control loop and for monitoring purposes. 
Member Number: 3
Base type:
SNVT_lev_percent
Direction: output
Service: unacknowledged
Minimum: 0,000
Maximum: 100,000
nvoCoolOutputCool control output.:   Current position of the cool actuator; can be used as part of a control loop and for monitoring purposes. 
Member Number: 4
Base type:
SNVT_lev_percent
Direction: output
Service: unacknowledged
Minimum: 0,000
Maximum: 100,000
nvoFanSpeedFan speed output.:   Current fan speed of a multi-speed (n-speed) fan; can be used as part of a control loop and for monitoring purposes. 
Member Number: 5
Base type:
SNVT_switch
Direction: output
Service: unacknowledged


Optional Network Variables

nviFanSpeedCmdFan speed command.:   Used to connect an external fan speed switch to the node. 
Member Number: 6
Base type:
SNVT_switch
Direction: input
Service: any
nviOccCmdOccupancy input.:   Commands the fan coil unit controller object into different occupancy modes. 
Member Number: 7
Base type:
SNVT_occupancy
Direction: input
Service: any
nviApplicModeApplication mode input.:   Coordinates this object with any supervisory controller providing the supply energy. 
Member Number: 8
Base type:
SNVT_hvac_mode
Direction: input
Service: any
nviSetPtOffsetSetpoint offset input.:   This setpoint shifting operates only on occupied and standby setpoints. It does not affect the unoccupied setpoint. 
Member Number: 9
Base type:
SNVT_temp_p
Direction: input
Service: any
Minimum: -10,00
Maximum: 10,00
nviWaterTempWater temperature input.:   Automatic heat/cool switchover dependent on the supply temperature. 
Member Number: 10
Base type:
SNVT_temp_p
Direction: input
Service: any
Minimum: -10,00
Maximum: 90,00
nvoTerminalLoadTerminal load output.:   Present heat/cool energy demand of the FCU controller. 
Member Number: 11
Base type:
SNVT_lev_percent
Direction: output
Service: unacknowledged
nvoLoadAbsAbsolute power consumption output.:   Present heat/cool power consumption of the FCU controller. 
Member Number: 12
Base type:
SNVT_power
Direction: output
Service: unacknowledged
nvoDischAirTempDischarge air temperature output.:   Temperature of the air that leaves the fan coil. 
Member Number: 13
Base type:
SNVT_temp_p
Direction: output
Service: unacknowledged
Minimum: -10,00
Maximum: 50,00
nvoReheatReheat output.:   Present state of an multi-stage (n-stage) reheat output. 
Member Number: 14
Base type:
SNVT_switch
Direction: output
Service: unacknowledged
nvoSpaceTempSpace temperature output.:   Space temperature, if this temperature is locally measured. 
Member Number: 15
Base type:
SNVT_temp_p
Direction: output
Service: unacknowledged
Minimum: -10,00
Maximum: 50,00
nvoEffectSetPtEffective setpoint output.:   May depend on nciSetPnts, nviOccCmd, nviSetPoint, nviSetPtOffset, any local setpoint means. 
Member Number: 16
Base type:
SNVT_temp_p
Direction: output
Service: unacknowledged
Minimum: 10,00
Maximum: 35,00
nviDischAirTempDischarge air temperature input.:   The network value takes precedence over the physical value if both are available. 
Member Number: 17
Base type:
SNVT_temp_p
Direction: input
Service: any
Minimum: -10,00
Maximum: 50,00
nviEnergyHoldOffEnergy hold-off input.:   Input from a device such as a window contact sensor. 
Member Number: 18
Base type:
SNVT_switch
Direction: input
Service: any
nvoOccCmdOccupancy output.:   May derive from an occupancy sensor or any other means affecting the occupancy mode. 
Member Number: 19
Base type:
SNVT_occupancy
Direction: output
Service: unacknowledged
nvoEnergyHoldOffEnergy hold-off output.:   Provides other devices the state of an EnergyHoldOff device that is hardwired to the controller. 
Member Number: 20
Base type:
SNVT_switch
Direction: output
Service: unacknowledged
nvoUnitStatusUnit status output.:   Combines operating mode, capacity of heating/cooling used, and an indication if any alarms are present in the object. 
Member Number: 21
Base type:
SNVT_hvac_status
Direction: output
Service: unacknowledged


Mandatory Configuration Properties

nciSndHrtBtMaximum send time.:   The maximum period of time between consecutive transmissions of the current value. 
Member Number: 1
Base type:
SCPTmaxSendTime
Applies to SFPTfanCoilUnit
Array: not permitted
Default: 0,0
nciSetPntsOccupancy temperature setpoints.:   The occupancy temperature setpoints for heat and cool mode. 
Member Number: 2
Base type:
SCPTsetPnts
Applies to SFPTfanCoilUnit
Array: not permitted
Minimum: 10,00,10,00,10,00,10,00,10,00,10,00
Maximum: 35,00,35,00,35,00,35,00,35,00,35,00
Default: 23,00,25,00,28,00,21,00,19,00,16,00


Optional Configuration Properties

nciRcvHrtBtMaximum receive time.:   The maximum period of time that may expire with no updates on the associated input network variables before the object goes into heartbeat failure mode. A zero value disables the mechanism.  
Member Number: 3
Base type:
SCPTmaxRcvTime
Applies to SFPTfanCoilUnit
Array: not permitted
Default: 0,0
nciMinOutTmMinimum send time.:   The minimum period of time between consecutive transmissions of the current value. 
Member Number: 4
Base type:
SCPTminSendTime
Applies to SFPTfanCoilUnit
Array: not permitted
Default: 0,0
nciLocationLocation:   Provides descriptive physical location information related to the object. 
Member Number: 5
Base type:
SCPTlocation
Applies to SFPTfanCoilUnit
Array: not permitted
nciNumValveNumber of output valves.:   The value 1 implies one output valve (two pipe system) and the value 2 implies two output valves (four pipe system). 
Member Number: 6
Base type:
SCPTnumValves
Applies to SFPTfanCoilUnit
Array: not permitted
Minimum: 1
Maximum: 2
Default: 2