Honeywell W7750A 74-2958 100, DestRmTemp NviSpaceTemp Degrees F, SNVTtempp 14 to, SNVTtempp 40 to

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Table 26. LONMARK® /Open System Points. (Continued)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

User Address

NvName

Field Name

(Metric) or States plus Range

DigitalStateor ValueofState

Default

E-Vision(M,P,S)

Share

Map

DirectAccess

HardwareConfig.

ManualConfig.

FailureDetect

Comments

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

Engineering Units: English

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DestRmTemp

nviSpaceTemp

 

Degrees F

 

SI_INVALID

 

X

 

X

 

X

X

SpaceTemp is the space temperature sensed by another node and is

 

(SNVT_temp_p)

 

14 to 122

 

 

 

 

 

 

 

 

 

typically bound to SpaceTemp of another node having a space temperature

 

 

 

Degrees C

 

 

 

 

 

 

 

 

 

sensor. If SpaceTemp has a value other than SI_INVALID it is used as the

 

 

 

(-10 to 50)

 

 

 

 

 

 

 

 

 

sensed space temperature by the node rather than using any local hard-

 

 

 

 

 

 

 

 

 

 

 

 

 

wired sensor. If the value is outside the allowed range of -10 to 50 degrees

 

 

 

 

 

 

 

 

 

 

 

 

 

C (-18 to 90 degrees F), then the node uses the value of the nearest range

 

 

 

 

 

 

 

 

 

 

 

 

 

limit. When SpaceTemp is not bound to another node, SpaceTemp may be

 

 

 

 

 

 

 

 

 

 

 

 

 

used to fix the sensed temperature. A management node may write a value

 

 

 

 

 

 

 

 

 

 

 

 

 

other than SI_INVALID, causing the node to use SpaceTemp instead of the

 

 

 

 

 

 

 

 

 

 

 

 

 

hard-wired sensor. An application restart or power failure causes the fixed

 

 

 

 

 

 

 

 

 

 

 

 

 

sensor value to be forgotten and SpaceTemp to be returned to

 

 

 

 

 

 

 

 

 

 

 

 

 

SI_INVALID.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SrcRmTemp

nvoSpaceTemp

 

Degrees F

 

SI_INVALID

 

X

 

X

 

 

 

SpaceTemp is the sensed space temperature from the locally wired sensor.

 

(SNVT_temp_p)

 

14 to 122

 

 

 

 

 

 

 

 

 

SpaceTemp is typically bound to SpaceTemp of another node which may

 

 

 

Degrees C

 

 

 

 

 

 

 

 

 

not have its own space temperature sensor but control the same space.

 

 

 

(-10 to 50)

 

 

 

 

 

 

 

 

 

The reported space temperature includes the offset correction

 

 

 

 

 

 

 

 

 

 

 

 

 

Config.SpaceTempZeroCal. If the space temperature sensor is not

 

 

 

 

 

 

 

 

 

 

 

 

 

connected or is shorted, or if SpaceTemp is bound to another node, then

 

 

 

 

 

 

 

 

 

 

 

 

 

SpaceTemp is set to SI_INVALID.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DestOaTemp

nviOdTemp

 

Degrees F

 

SI_INVALID

M

X

 

X

 

X

X

OdTemp allows one outside air temperature sensor at a node to be shared

 

(SNVT_temp_p)

 

-40 to 122

 

 

 

 

 

 

 

 

 

by many other nodes. When OdTemp is not SI_INVALID, then any local

 

 

 

Degrees C

 

 

 

 

 

 

 

 

 

sensor is ignored by the local control algorithm and OdTemp is used

 

 

 

(-40 to 50)

 

 

 

 

 

 

 

 

 

instead. If the value is outside the allowed range of -40 to 50 degrees C (-

 

 

 

 

 

 

 

 

 

 

 

 

 

72 to 90 degrees F), then the node uses the value of the nearest range

 

 

 

 

 

 

 

 

 

 

 

 

 

limit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SrcOaTemp

nvoOdTemp

 

Degrees F

 

SI_INVALID

M

X

 

X

 

 

 

OdTemp allows the local outdoor temperature sensor to be shared with

 

(SNVT_temp_p)

 

-40 to 122

 

 

 

 

 

 

 

 

 

other nodes and is typically bound to OdTemp on other nodes. If the local

 

 

 

Degrees C

 

 

 

 

 

 

 

 

 

sensor is configured by Select, OdTemp is periodically sent on the network.

 

 

 

(-40 to 50)

 

 

 

 

 

 

 

 

 

If the local sensor is not configured or currently showing an error, the value

 

 

 

 

 

 

 

 

 

 

 

 

 

is SI_INVALID.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DestOaHum

nviOdHum

 

Percentage

 

SI_INVALID

M

X

 

X

 

X

X

OdHum allows one outdoor humidity sensor at a node to be shared by

 

(SNVT_lev_percent)

 

10 to 90

 

 

 

 

 

 

 

 

 

many other nodes. When nviOdHum is not SI_INVALID, then the local

 

 

 

 

 

 

 

 

 

 

 

 

 

sensor, is ignored by the local control algorithm and OdHum is used

 

 

 

 

 

 

 

 

 

 

 

 

 

instead. If the value is outside the allowed range (10 to 90 percent), then

 

 

 

 

 

 

 

 

 

 

 

 

 

the node uses the value of the nearest range limit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SrcOaHum

nvoOdHum

 

Percentage

 

SI_INVALID

M

X

 

X

 

 

 

OdHum allows the local outdoor humidity sensor to be shared with other

 

(SNVT_lev_percent)

 

10 to 90

 

 

 

 

 

 

 

 

 

nodes and is typically bound to OdHum on other nodes. If the local sensor

 

 

 

 

 

 

 

 

 

 

 

 

 

is configured by Select, OdHum is periodically sent on the network. If the

 

 

 

 

 

 

 

 

 

 

 

 

 

local sensor is not configured or currently showing an error, the value is

 

 

 

 

 

 

 

 

 

 

 

 

 

SI_INVALID.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

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Contents Excel Appendices General Considerations W7750 Controllers72-2958 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-1Power Performance SpecificationsSpecial Note for the W7750B,C Unit CPU Specified Space Temperature Sensing RangeMemory Capacity Excel 10 W7750C Constant Volume AHU Controller Jack DIN rail adapters Lonmark Functional ProfileInputs/Outputs Analog InputsTriac Outputs on the W7750B,C Models only Digital InputsDigital 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 Budget Calculation Example Power WiringDeviceVA 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 EquipmentHoneywell Logo T7770D1018 T7770 and T7560 Wall ModulesSensor with Bypass/LED and Lonworks Jack Accessories Accessories SensorsEchelon Based Components and Parts Configure Controllers TroubleshootingTroubleshooting Excel 10 Controllers and Wall Modules CablingExcel 10 Alarms 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 DLCSee for a diagram of a typical W7750 Unit Temperature Control OperationsDirty 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 SiinvalidFalse PPM SiinvalidTrue 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 FHvacmrngwrmup Hvacauto HvacnulHvactest 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 OhmsSensor Voltage Versus Humidity Humidity Percentage Voltage/Current SensorsSensor Voltage Versus Humidity Relative Humidity Percentage Sensor Current Versus Enthalpy volts Enthalpy mA 113 74-295874-2958 114 T7242 or equivalentMAmAmAmA 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