Table 20. Input/Output Points. (Continued)
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| Value | Digital |
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| Direct |
| Hardware | Manual |
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| User Address |
| NvName |
| Field Name | (Metric) or States plus Range |
| ofState | Stateor |
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| Default | (M, P,S) | Share | Map | Access |
| Config. | Config. |
| Test |
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| Comments | |||||
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| Engineering Units: English |
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| WindowSw | nvoIO | WindowOpen | FALSE |
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| 0 |
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| FALSE | M, |
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| WindowOpen is the state of the digital input configured and wired to a | ||||||
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| TRUE |
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| 1 |
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| S |
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| window open sensor switch. 1 (input open circuit) means that the window is | ||
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| open, and 0 (input shorted) means that the window is closed. | ||
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| MonitorSw | nvoIO | MonSwitch | FALSE |
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| 0 |
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| FALSE |
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| MonSwitch is the state of the digital input configured and wired to a general | ||||||
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| TRUE |
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| 1 |
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| purpose monitor switch. 1 (input shorted) means that switch is closed, and | ||
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| 0 (input open) means that the switch is open. | ||
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| ModelSw | nvoIO | Model | FALSE |
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| 0 |
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| FALSE |
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| X |
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| Model indicates the Model of the node. One of the digital inputs is | ||||||
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| TRUE |
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| 1 |
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| connected to a printed wiring board trace to let the embedded software | ||
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| know what kind of hardware is present. If Model is 1 (input held high), the | ||
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| hardware is the W7750B Model. If Model is 0 (input shorted to ground), the | ||
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| hardware is the W7750A Model. | ||
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| nvoIO | SchedMaster | FALSE |
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| 0 |
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| FALSE | M |
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| X |
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| If ScheduleMaster is 1 (input shorted), the node is the schedule master and | ||||||
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| TRUE |
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| 1 |
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| the locally connected time clock will be sent via TimeClk to other nodes on | ||
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| the network. If ScheduleMaster is 0, (input open), the node is not a | ||
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| schedule master and nvoTimeClk will not be sent on the network even if the | ||
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| time clock input is configured. If the ScheduleMaster input is not configured | ||
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| by Select, TimeClk reports the state of the locally connected time clock. | ||
73 |
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| Table 21. Control Parameters. |
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| DigitalStateor ValueofState |
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| Share |
| Map |
| DirectAccess |
| HardwareConfig. |
| ManualConfig. | Test | |||
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| Engineering Units: English |
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| |||
| User Address |
| NvName |
| Field Name |
| (Metric) or States plus Range |
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| Default |
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| Comments | ||||
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| DaTempLoLim |
| nciAux1SetPt |
| siLowLimitDischAirTempS7 | Degrees F |
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| 45 |
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| P |
| X |
| X |
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| When the discharge air temperature falls below | ||
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| 0 to 60 |
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| LowLimitDischAirTemp, the outdoor air dampers are closed to a |
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| Degrees C |
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| position that corrects the low temperature problem. If mechanical |
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| cooling is active when the discharge air falls below | |
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| LowLimitDischAirTemp, the mechanical cooling cycles off after the |
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| minimum run times are obeyed to allow the dampers to return open |
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| and provide free cooling. |
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| DaTempHiLim |
| nciAux1SetPt |
| siMaxDisAirTempHeatS7 | Degrees F | Degrees C |
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| 100 |
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| P |
| X |
| X |
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| When the mode is HEAT, and the CascadeControl is enabled, the | ||||
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| 65 to 135 | (18 to 57) |
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| discharge air temperature is controlled to a value not to exceed | ||
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| MaxDisAirTempHeat. |
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| DlcBumpTemp |
| nciAux1SetPt |
| siDlcBumpTempS7 |
| Degrees F | Degrees C |
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| X |
| X |
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| When DlcShed is not 0 then the setpoint is shifted by DlcBumpTemp | |||
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| 0 to +10 |
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| in the energy saving direction. When DlcShed changes from 1 to 0, | |||
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| the setpoint shift ramps back to 0 over a 30 minute interval. |
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| OaTempHtLkOut |
| nciAux1SetPt |
| ubOdHtLockOutTempS0 | Degrees F | Degrees C |
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| 70 |
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| X |
| X |
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| When the outdoor air temperature is greater than | ||||
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| 0 to 90 |
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| OdHtLockOutTemp, the heating is disabled. | |||
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EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER