Refrigerated Display-Case Thermostat Controller.. Used to control the thermostatic functions of a refigerated display case.
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Network Variables | Configuration Properties |
nvoAirTemp
nvoThermostatState
nviAirTemp1
nviAirTemp2
nviDayNight
nviDefrostState
nvoActuatorValve
nvoAlarmAirTemp
nvoCutoutTemp
nvoDifference
nvoDischargeTemp
nvoReturnTemp
| nciMaxSendTime
nciAirTemp1PercentAlarm
nciAirTemp1PercentDay
nciAirTemp1PercentNight
nciCutoutValue
nciDayNightControl
nciDeltaNight
nciDifferenceNight
nciDifferenceValue
nciHighLimitDelay
nciHighLimitPdDly
nciHighLimitTemp
nciLocationLabel
nciLowLimitDelay
nciLowLimitTemp
nciThermostatMode
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Details: |
| Resource Set:
| Standard 00:00:00:00:00:00:00:00-0 |
| Index:
| 67 |
| Obsolete:
| no |
| Key:
| 10012 |
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Inheriting:
| no |
Mandatory Network Variables |
| nvoAirTemp | Calculated Air Temperature.: This NV is the calculated case air temperature. An error on the sensor is indicated with the error value for SNVT_temp_p (0x7fff).
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| Member Number:
| 1 | |
Base type:
| | | Direction:
| output | | Service:
| any |
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| nvoThermostatState | Thermostat State.: This NV indicates the current state of the Thermostat Object. There are currently three different control methods supported by the Thermostat Object (See PDF)
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| Member Number:
| 2 | |
Base type:
| | | Direction:
| output | | Service:
| any |
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Optional Network Variables |
| nviAirTemp1 | Measured Air Temperature 1.: This NV is to be assigned to discharge or return air as required. An error on the sensor is indicated with the error value for SNVT_temp_p (0x7fff).
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| Member Number:
| 3 | |
Base type:
| | | Direction:
| input | | Service:
| any |
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| nviDayNight | Discrete level.: This SNVT is obsolete. Use SNVT_switch instead.
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| Member Number:
| 4 | |
Base type:
| | | Direction:
| input | | Service:
| any |
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| nvoCutoutTemp | Cut out Temperature.: This NV indicates the current cut out limit used by the thermostat object in its agorithms.
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| Member Number:
| 5 | |
Base type:
| | | Direction:
| output | | Service:
| any |
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| nviAirTemp2 | Measured Air Temperature 2.: This NV is to be assigned to discharge or return air as required. An error on the sensor is indicated with the error value for SNVT_temp_p (0x7fff).
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| Member Number:
| 6 | |
Base type:
| | | Direction:
| input | | Service:
| any |
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| nvoDifference | Difference Temperature.: This NV indicates the value to be added to the nviCutoutTemp to get the thermostat cut in limit if cut in / out control is selected.
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| Member Number:
| 7 | |
Base type:
| | | Direction:
| output | | Service:
| any |
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| nviDefrostState | Defrost state.: This NV indicates the current state of the defrost object.
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| Member Number:
| 8 | |
Base type:
| | | Direction:
| input | | Service:
| any |
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| nvoAlarmAirTemp | Alarm Air Temperature.: The nvoAlarmAirTemp indicates the current air temperature used by the alarm section of the thermostat object.
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| Member Number:
| 9 | |
Base type:
| | | Direction:
| output | | Service:
| any |
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| nvoDischargeTemp | Discharge Air Temperature.: The nvoDischargeTemp indicates the current evaporator discharge air temperature used by the thermostat object.
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| Member Number:
| 10 | |
Base type:
| | | Direction:
| output | | Service:
| any |
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| nvoReturnTemp | Return Air Temperature.: The nvoReturnTemp indicates the current evaporator return air temperature used by the thermostat object.
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| Member Number:
| 11 | |
Base type:
| | | Direction:
| output | | Service:
| any |
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| nvoActuatorValve | Actuator Valve.: This output can be used to drive a refrigeration valve or compressor.
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| Member Number:
| 12 | |
Base type:
| | | Direction:
| output | | Service:
| any |
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Mandatory Configuration Properties |
| nciMaxSendTime | Maximum send time.: The maximum period of time between consecutive transmissions of the current value.
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Optional Configuration Properties |
| nciLocationLabel | Location: Provides descriptive physical location information related to the object.
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| nciThermostatMode | Thermostat mode.: The thermostat control strategy.
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| nciCutoutValue | Cut-out value.: The cut-out limit.
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| nciDifferenceValue | Difference value.: The value to be added to the cut-out value to get the cut-in limit.
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| nciDayNightControl | Day/night control.: Configures the day/night function.
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| Member Number:
| 6 | |
Base type:
| | |
Applies to
| SFPTrefrigDisplayCaseControllerThermostat | | Array:
| not permitted | | Default:
| 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |
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| nciAirTemp1PercentDay | Air temperature 1 percent day.: The air temperature weighting used during day control.
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| nciAirTemp1PercentNight | Air temperature 1 percent night.: The air temperature weighting used during night control.
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| nciDeltaNight | Delta night.: The value to be added to the cut-out value to get the cut-out limit during night control.
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| nciDifferenceNight | Difference night.: The value to be added to the cut-out value to get the cut-in limit during night control.
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| nciAirTemp1PercentAlarm | Air temperature 1 percent alarm.: The weighting of the air temp 1 sensor when calculating the air temp alarm.
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| nciHighLimitTemp | High limit temperature.: The high alarm set point for the alarm air temp network variable.
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| nciLowLimitTemp | Low limit temperature.: The low alarm set point for the alarm air temp network variable.
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| nciHighLimitPdDly | High limit defrost delay.: The time limit before high air temp alarm during pull-down.
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| nciLowLimitDelay | Low limit delay.: The time limit during normal operation before the alarm air temp low alarm is recognized.
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| nciHighLimitDelay | High limit delay.: The time limit during normal operation before the alarm air temp high alarm is recognized.
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