Honeywell W7750A specifications Data Share Points

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Table 28. Data Share Points.

Digital Stateor Value ofState

E-Vision (M, P,S)

DirectAccess

ManualConfig.

FailureDetect

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

User Address

NvName

Field Name

(Metric) or States plus Range

Default

Share

Map

Comments

Engineering Units: English

DestOaEnth

nviOdEnthS7

mA

SI_INVALID

X

X

X

nviOdEnth allows one outdoor enthalpy sensor at a node to be shared by many

4 to 20

other nodes. When nviOdEnth is not SI_INVALID then any local sensor is

ignored by the local control algorithm and OdEnth is used instead. If the value is

outside the allowed range (4 to 20 mA), then the node uses the value of the

nearest range limit.

SrcOaEnth

nvoOdEnthS7

mA

SI_INVALID

M

X

X

nvoOdEnth allows the local outdoor enthalpy sensor to be shared with other

4 to 20

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

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

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

SrcMonSwCt

nvoMonSw

value

0 to 100

0

X

MonSw value allows the monitor switch to be shared with another node. MonSw

is typically bound to an SBC to indicate a user defined alarm condition. The

output values have the following meanings: If the state is SW_OFF and the

value is 0, then the monitor switch is open. If the state is SW_ON and the value

is 100 percent, then the monitor switch is closed. If the state is SW_NUL and

the value is 0, then the monitor switch is not configured by Select.

SrcMonSw

nvoMonSw

state

SW_OFF

0

SW_NUL

M

X

For MonSw.state, refer to MonSw.value.

SW_ON

1

SW_NUL

255

nviIaqOvr

value

0 to 100

0

IaqOvr allows an indoor air quality sensor to be shared by many other nodes.

The states are follows: If the state is SW_OFF and the value is don’t care, then

the indoor air quality is acceptable. If the state is SW_ON and the value is 0,

then the indoor air quality is acceptable. If the node receives this combination of

state and value, then state is set to SW_OFF. If the state is SW_ON and the

value is not zero, then the indoor air quality is not acceptable and additional

outdoor air is needed to bring it back to acceptable. If the state is SW_NUL and

the value is don’t care, then the indoor air quality is acceptable. If the state is

other, then the network variable is not bound, the communications path from the

sending node has failed, or the sending node has failed. The indoor air quality is

acceptable.

DestIaqOvrd

nviIaqOvr

state

SW_OFF

0

SW_NUL

M

X

X

X

X

For IaqOvr.state, refer to IaqOvr.value.

SW_ON

1

SW_NUL

255

SrcIaqOvrCt

nvoIaqOvr

value

0 to 100

0

X

X

IaqOvr allows an indoor air quality sensor to be shared with other nodes and is

typically bound to IaqOvr on other nodes. If Data2.siSpaceCo2 is not

SI_INVALID, and exceeds Aux1SetPt.CO2IaqLimit, then poor air quality is

detected. In addition, if a local digital input is configured for IAQ_OVERRIDE_IN

and IO.IaqOverRide is 1 (TRUE) then poor air quality is also detected. The state

has the following meanings: If the state is SW_OFF and the value is 0, then the

indoor air quality is acceptable. If the state is SW_ON and the value is 100

percent, then the indoor air quality is not acceptable and additional outdoor air is

needed to bring it back to an acceptable state. If the state is SW_NUL and the

value is 0, then the economizer for this node has not been configured or there is

no sensor (via IO.SpaceDo2 or IO.IaqOverRide) configured or the only

configured sensor (via IO.SpaceCo2) has failed.

SrcIaqOvr

nvoIaqOvr

state

SW_OFF

0

SW_NUL

M

X

X

For IaqOvr.State, refer to IaqOvr.value.

SW_ON

1

SW_NUL

255

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER