Honeywell W7750A DisMinHtTime NciConfig DisableHeatMinTime, CascCntrl NciConfig CascadeControl

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96

Table 25. Configuration Parameters. (Continued)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Value

Digital

 

E-Vision

 

 

Direct

Hardware

Manual

 

NOTE: Physical I/O points that are configurable are in Table 20.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic

User Address

NvName

Field Name

(Metric) or States plus Range

ofState

Stateor

Default

(M, P,S)

Share

Map

Access

Config.

Config.

Test

Comments

 

 

 

Engineering Units: English

 

 

 

 

 

 

 

 

 

 

 

DisMinHtTime

nciConfig

DisableHeatMinTime

FALSE

0

 

FALSE

P

 

X

X

 

 

 

If DisableHeatMinTime is 0 (FALSE), the heating stages are on or off for a

 

 

 

TRUE

1

 

 

 

 

 

 

 

 

 

minimum time determined by ubHeatCph (Refer to Table 17 Interstage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Minimum Times of the System Engineering Guide). If DisableHeatMinTime

 

 

 

 

 

 

 

 

 

 

 

 

 

 

is 1 (TRUE), the heating stages are on or off for a 30 second minimum

 

 

 

 

 

 

 

 

 

 

 

 

 

 

time.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DisMinClTime

nciConfig

DisableCoolMinTime

FALSE

0

 

FALSE

P

 

X

X

 

 

 

If DisableCoolMinTime is 0 (FALSE), the cooling stages are on or off for a

 

 

 

TRUE

1

 

 

 

 

 

 

 

 

 

minimum time determined by CoolCph (Refer to Table 17 Interstage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Minimum Times of the System Engineering Guide). If DisableCoolMinTime

 

 

 

 

 

 

 

 

 

 

 

 

 

 

is 1 (TRUE), the cooling stages are on or off for a 30 second minimum

 

 

 

 

 

 

 

 

 

 

 

 

 

 

time.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CascCntrl

nciConfig

CascadeControl

FALSE

0

 

FALSE

P

 

X

X

 

 

 

When CascadeControl is 0 (FALSE), then the discharge air temperature is

 

 

 

TRUE

1

 

 

 

 

 

 

 

 

 

not directly controlled and heating and cooling equipment are modulated to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

maintain space temperature. When CascadeControl is 1 (TRUE), then the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

discharge air temperature is controlled by an additional control loop based

 

 

 

 

 

 

 

 

 

 

 

 

 

 

on the error signal from the space temperature control loop. Cascade

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Control is applicable to modulating heating/cooling only (not staged).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UseRaTempCtl

nciConfig

ControlUsesRtnAirTemp

FALSE

0

 

FALSE

P

 

X

X

 

 

 

If ControlUsesRtnAirTemp is a 0 (FALSE), then Data2.SpaceTemp is set

 

 

 

TRUE

1

 

 

 

 

 

 

 

 

 

equal either the space temperature sensor (IO.siSpaceTemp) or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SpaceTemp depending on the value of SpaceTemp. When

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ControlUsesRtnAirTemp is 1 (TRUE) and SpaceTemp is SI_INVALID, then

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Data2.SpaceTemp is set equal to return air sensor (IO.ReturnTemp) and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the control uses the return air sensor to control heating or cooling. When

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ControlUsesRtnAirTemp is 1 (TRUE) and SpaceTemp is not SI_INVALID,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

then Data2.siSpaceTemp is set equal to SpaceTemp and the control uses

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SpaceTemp to control heating or cooling.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IaqUseHeat

nciConfig

IaqUseHeat

FALSE

0

 

FALSE

P

 

X

X

 

 

 

When the effective occupancy is OC_OCCUPIED and IaqUseHeat is 0

 

 

 

TRUE

1

 

 

 

 

 

 

 

 

 

(FALSE), then no heating stages or modulating heating are turned when

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the discharge air temperature goes below the low limit. Energy has priority

 

 

 

 

 

 

 

 

 

 

 

 

 

 

over ventilation. When the effective occupancy is OC_OCCUPIED and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IaqUseHeat is 1 (TRUE), then the heating stages or modulating heating

 

 

 

 

 

 

 

 

 

 

 

 

 

 

are turned on to prevent the discharge air temperature from going below

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the discharge air temperature low limit. Ventilation has priority over energy

 

 

 

 

 

 

 

 

 

 

 

 

 

 

cost.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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Contents Excel General Considerations W7750 Controllers Appendices72-2958 List of Figures 74-2958Setpoint ramping parameters with ramp rate calculation 74-2958List of Tables Description of Devices Typical system overviewControl Application Control ProvidedProducts Covered Organization of ManualApplicable Literature Form No TitleProduct Names Agency ListingsAbbreviations and Definitions Construction ControllersW7750A DI-1Performance Specifications PowerSpecial Note for the W7750B,C Unit Specified Space Temperature Sensing Range CPUMemory Capacity Excel 10 W7750C Constant Volume AHU Controller Jack DIN rail adapters Lonmark Functional ProfileInputs/Outputs Analog InputsDigital Inputs Triac Outputs on the W7750B,C Models onlyDigital Outputs Wall Modules Duct SensorT7770A1006 T7770CT7560A,B construction in in. mm Configurations GeneralConfiguration Options Summary For W7750A,B,C Controllers Allowable Heating and Cooling Equipment Configurations Staged HEATING/COOLING ControlHeat Pump Control Modulating HEATING/COOLING ControlEconomizer Control Pneumatic Actuator ControlOccupancy Sensor Window Open/Closed Digital InputWall Module Options MIXED-OUTPUT-TYPE ControlModes of Operation Dirty Filter MonitorIndoor Air Quality IAQ Override Smoke ControlOFF Mode DisabledNot AssignedOverview Plan the SystemDetermine Other Bus Devices Required Step No DescriptionLay Out Communications and Power Wiring Lonworks Bus LayoutExcel VAV Cvahu Power Wiring Power Budget Calculation ExampleDeviceVA Information Obtained from VA Ratings For Transformer Sizing Device Description ML6161A/B Damper Actuator, 35 lb-in R8242A ContactorML7984B PWM Valve Actuator Line LossPower wiring details for one Excel 10 per Transformer Nema class 2 transformer voltage output limitsPrepare Wiring Diagrams General ConsiderationsW7750 Controllers Factory Default Digital Outputs Terminal Terminal Number DescriptionConstant Volume AHU Controller ML6161 Floating Actuator COM CCW Load Controller Power Heat Wall Economizer Damper PWM Actuator Power Signal W7750C Constant Lonworks Bus Termination Module Pneumatic transducer to W7750B,C Shown, see triangle noteBrown Orange Lonworks Bus termination wiring options Order EquipmentT7770 and T7560 Wall Modules Honeywell Logo T7770D1018Sensor with Bypass/LED and Lonworks Jack Accessories Sensors AccessoriesEchelon Based Components and Parts Configure Controllers TroubleshootingTroubleshooting Excel 10 Controllers and Wall Modules CablingAlarms Excel 10 AlarmsResistance Value ohms Broadcasting the Service Message W7750 Controller Status LEDAppendix A. Using E-Vision to Commission a W7750 Controller Setting the Pid ParametersT7770C,D Wall Module Bypass Pushbutton and Override LED Sensor CalibrationAppendix B. Sequences of Operation Common Operations Room Temperature Sensor RmTemp HeatingEconomizer IAQ OptionBypass Mode StatusOvrd and StatusLed Remote Setpoint RmtStptPotSetpoint Limits LoSetptLim and HiSetptLim BypassTimeContinuous Unoccupied Mode Occupancy Mode and Manual Override ArbitrationNot Assigned Bypass OccupiedRecovery Ramping for Heat Pump Systems Time Clock OccTimeClockSchedule Master SchedMaster Setpoint RampingWindow Sensor StatusWndw Smoke ControlFAN Operation Demand Limit Control DLCTemperature Control Operations See for a diagram of a typical W7750 UnitDirty Filter Monitor Staged Cooling Control ONE StageTWO Stages Three StagesCascade Control of Modulating COOLING/HEATING Series 60 Modulating ControlPulse Width Modulating PWM Control Outdoor AIR Lockout of HEATING/COOLINGEconomizer ENABLE/DISABLE Control Indoor AIR Quality IAQ OverrideFreeze Stat Discharge AIR LOW Limit ControlInput Output Points Address Control Parameters AddressEnergy Management Points Address Status Points AddressMappable User Addresses and Table Number Relative Temperature Air FlowCO2 Concentration EnthalpyApplication reset therefore, these points can Placed in manual mode through a menuValid states and the corresponding Enumerated values are shownDefault Input/Output PointsNvName Field Name CommentsNciIoSelect DigitalIn1 Occsensor Shcedmasterin255 NciIoSelect DigitalIn2 Occsensor UnuseddiCOOLSTAGE1 COOLSTAGE2COOLSTAGE3 COOLSTAGE4Sixtyfifty SiinvalidPPM Siinvalid FalseTrue EconEnSw NvoIO EconEnableIn Position when poor indoor air quality is detectedStatusDI3 NvoIO UbDigitalIn OccSensr NvoIODefault Comments NvNameControl Parameters OdEnthalpyEnable MaxClRamp NciAux1SetPt UbMaxClRampS0 Degrees F/HrMinClRamp NciAux1SetPt UbMinClRampS0 Degrees F/Hr MaxClRamp, OdTempMaxClRamp,PPM Discharge air temperature cascade control loop GainCoolProp NciAux2SetPt UbKpCoolS2 Degrees F Degrees CGain for the cooling control loop GainHeatProp NciAux2SetPt UbKpHeatS2 Degrees F Degrees CEnergy Management Points Refer to WSHPEnable.value NviFree1 ValueAuxiliary functions. nviFree1 controls the FREE1OUT Network variable input failsNviTimeClk Value DestTimeClk NviTimeClk StateRefer to nviTimeClk.value 255 SrcTimeClkCt NvoTimeClk ValueStatus Points Alarmbit1 Bit Offset = SensorFailAlrmBit Offset = FrostProtectAlrm Bit Offset = InvalidSetPtAlrmNoalarm NodedisabledSmokealarm UpdateallfieldsDisabledmode StartupwaitHeat CoolStatusEconEn NvoData1 EconEnable Air flow switch is configuredNciAux1SetPts.ubOdEnthalpyEnableS2 StatusManOcc NvoData1 NetManOccHeatStgsOn NvoData1 HeatStagesOn Auxiliary heating stages are turned onCoolStgsOn NvoData1 CoolStagesOn For both heating or coolingIs 1, the algorithm controls as per the settings found NciConfig.SmokeControlController mode is switched to Freezeprotect MonitorSw NvoData1 MonSwitchBypasstimerfield TempcontrolptfieldSpacetempfield DischargetempfieldUbinvalid StatusError NvoError Errorbit0 SpaceTempErrorNvoError Errorbit0 Bit Offset = Temperature SetPtError NvoError Errorbit0NvoError Errorbit1 Bit Offset = RtnEnthalpyError NvoError Errorbit1Are disabled as if the sensor was not configured Bit Offset = SpaceCO2Error NvoError Errorbit1Bit Offset = NvWindowError NvoError Errorbit2 Bit Offset = NvDlcShedError NvoError Errorbit2Bit Offset = NvTodEventError NvoError Errorbit3 Bit Offset = NvByPassError NvoError Errorbit3Cfglocal CfgexternalCfgnul Calibration PointsConfiguration Parameters False True DisMinHtTime NciConfig DisableHeatMinTime DisMinClTime NciConfig DisableCoolMinTimeCascCntrl NciConfig CascadeControl UseRaTempCtl NciConfigLast NET Offset AbsolutemiddleNone Normal BypassonlyLonmark /Open System Points Hvacauto HvacheatHvacmrngwrmup Hvacprecool Hvaccool Hvacnightpurge Hvacnul Hvacoff74-2958 100 DestRmTemp NviSpaceTemp Degrees FSNVTtempp 14 to SrcRmTemp NvoSpaceTemp Degrees FHvacauto Hvacnul HvacmrngwrmupHvactest Alarmnotifydisabled NvoStatus Electricalfault 103 NvoStatus Inalarm255 Not configured 74-2958 NvoStatus UnabletomeasureSwon On other nodes. If the economizer function is configured by Corresponding economizer function is not enabled becauseSrcEconEnable NvoEcon State SrcEconEnCt NvoEcon ValueDirect Access And Special Points OFF Data Share Points Approximate Memory Size Estimating Procedure =using One-to-Many and not using points= including mapped points and others for Mapped points = number of mapped points per ExcelSensor Resistance Versus Temperature Resistance Ohms Resistance SensorsSensor Type Sensor UseOffset Setpoint Temperature Direct Setpoint TemperatureT7770B,C 10K ohm setpoint potentiometer Relative Above and Below Setpoint Resistance OhmsVoltage/Current Sensors Sensor Voltage Versus Humidity Humidity PercentageSensor Voltage Versus Humidity Relative Humidity Percentage Sensor Current Versus Enthalpy volts Enthalpy mA 113 74-2958T7242 or equivalent 74-2958 114MAmAmAmA AmA mA mA Sensor Voltage Versus Input Voltage To A/D Voltage to A/D Sensor Voltage Vdc Versus Pressure Inw Pressure Inw kPa Sensor Voltage VdcInw 50.0.13