Honeywell W7750A specifications NvName, Default Comments

Table 20. Input/Output Points. (Continued)

Value

Digital

E-Vision

Direct

Hardware

Manual

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

WindowSw

nvoIO

WindowOpen

FALSE

0

FALSE

M,

WindowOpen is the state of the digital input configured and wired to a

TRUE

1

S

window open sensor switch. 1 (input open circuit) means that the window is

open, and 0 (input shorted) means that the window is closed.

MonitorSw

nvoIO

MonSwitch

FALSE

0

FALSE

MonSwitch is the state of the digital input configured and wired to a general

TRUE

1

purpose monitor switch. 1 (input shorted) means that switch is closed, and

0 (input open) means that the switch is open.

ModelSw

nvoIO

Model

FALSE

0

FALSE

X

Model indicates the Model of the node. One of the digital inputs is

TRUE

1

connected to a printed wiring board trace to let the embedded software

know what kind of hardware is present. If Model is 1 (input held high), the

hardware is the W7750B Model. If Model is 0 (input shorted to ground), the

hardware is the W7750A Model.

nvoIO

SchedMaster

FALSE

0

FALSE

M

X

If ScheduleMaster is 1 (input shorted), the node is the schedule master and

TRUE

1

the locally connected time clock will be sent via TimeClk to other nodes on

the network. If ScheduleMaster is 0, (input open), the node is not a

schedule master and nvoTimeClk will not be sent on the network even if the

time clock input is configured. If the ScheduleMaster input is not configured

by Select, TimeClk reports the state of the locally connected time clock.

73

Table 21. Control Parameters.

DigitalStateor ValueofState

E-Vision(M,P,S)

Share

Map

DirectAccess

HardwareConfig.

ManualConfig.

Test

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

Engineering Units: English

User Address

NvName

Field Name

(Metric) or States plus Range

Default

Comments

DaTempLoLim

nciAux1SetPt

siLowLimitDischAirTempS7

Degrees F

45

P

X

X

When the discharge air temperature falls below

0 to 60

LowLimitDischAirTemp, the outdoor air dampers are closed to a

Degrees C

position that corrects the low temperature problem. If mechanical

(-1 to 16)

cooling is active when the discharge air falls below

LowLimitDischAirTemp, the mechanical cooling cycles off after the

minimum run times are obeyed to allow the dampers to return open

and provide free cooling.

DaTempHiLim

nciAux1SetPt

siMaxDisAirTempHeatS7

Degrees F

Degrees C

100

P

X

X

When the mode is HEAT, and the CascadeControl is enabled, the

65 to 135

(18 to 57)

discharge air temperature is controlled to a value not to exceed

MaxDisAirTempHeat.

DlcBumpTemp

nciAux1SetPt

siDlcBumpTempS7

Degrees F

Degrees C

3

P

X

X

When DlcShed is not 0 then the setpoint is shifted by DlcBumpTemp

0 to +10

(-18 to -12)

in the energy saving direction. When DlcShed changes from 1 to 0,

the setpoint shift ramps back to 0 over a 30 minute interval.

OaTempHtLkOut

nciAux1SetPt

ubOdHtLockOutTempS0

Degrees F

Degrees C

70

P

X

X

When the outdoor air temperature is greater than

0 to 90

(-18 to 32)

OdHtLockOutTemp, the heating is disabled.

74-2958— 1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER