Honeywell W7750A Hvacauto, Hvacheat, Hvacmrngwrmup Hvacprecool Hvaccool Hvacnightpurge Hvacnul

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

DestHvacMode

nviApplMode

HVAC_AUTO

0

HVAC_AUTO

M

X

X

X

X

X

ApplMode is an input that coordinates the roof top unit controller operation

(SNVT_hvac_mode)

HVAC_HEAT

1

with other controllers. HVAC_NIGHT_PURGE

HVAC_MRNG_WRMUP

2

HVAC_PRE_COOL

HVAC_COOL

3

HVAC_MRNG_WRMUP

HVAC_NIGHT_PURGE

4

HVAC_NUL

HVAC_PRE_COOL

5

HVAC_TEST are not supported and will default to the HVAC_AUTO setting

HVAC_OFF

6

if received.

HVAC_TEST

7

HVAC_EMERG_HEAT

8

HVAC_FAN_ONLY

9

HVAC_NUL

255

DestManOcc

nviManOcc

OC_OCCUPIED

0

OC_NUL

X

X

X

ManOcc is an input from a network connected operator interface or other

(SNVT_occupancy)

OC_UNOCCUPIED

1

node that indicates the state of a manual occupancy control thus over

OC_BYPASS

2

riding the scheduled occupancy state. ManOcc is used along with other

OC_STANDBY

3

occupancy inputs to calculate the effective occupancy of the node. See the

OC_NUL

255

Data1.EffectOcc and Data1.NetManOcc for more details.The valid

enumerated values have the following meanings: OC_OCCUPIED

indicates occupied. OC_UNOCCUPIED indicates not occupied.

99

OC_BYPASS indicates that the space is occupied for

Aux2SetPt.BypassTime seconds after ManOcc is first set to OC_BYPASS.

The timing is done by the bypass timer in this node. If ManOcc changes to

another value the timer is stopped.OC_STANDBY indicates that the space

is in standby mode.OC_NUL and all unspecified values means that no

manual occupancy control is requested. When ManOcc changes from

OC_OCCUPIED, OC_UNOCCUPIED, OC_BYPASS, or OC_STANDBY to

OC_NUL, any bypass condition is canceled.

DestRmTempSpt

nviSetPoint

Degrees F

SI_INVALID

X

X

X

SetPoint is an input network variable used to determine the temperature

(SNVT_temp_p)

50 to 95

control point of the node. If SetPoint is not SI_INVALID, then it is used to

Degrees C

determine the control point of the node. If SetPoint is SI_INVALID, then

(10 to 35)

other means are used to determine the control point. See

Data2.TempControlPt for more information.

DestSptOffset

nviSetPtOffset

Degrees F

0

X

X

X

X

SetPtOffset is input from an operator terminal or from an energy

(SNVT_temp_p)

-18 to 18

management system used to shift the effective temperature setpoint by

Degrees C

adding SetPtOffset to the otherwise calculated setpoint. If the value is

-10 to 10

outside the allowed range of -10 to +10 degrees C (-18 to 18 degrees F),

then the node uses the value of the nearest range limit.

SrcRmTempActSpt

nvoEffectSetPt

Degrees F

SI_INVALID

X

X

EffectSetPt is the current temperature control point (such that the current

(SNVT_temp_p)

50 to 95

actual space temperature setpoint which the controller is presently trying to

Degrees C

maintain in the conditioned space). See Data2.TempControlPt for more

(10 to 35)

details. EffectSetPt is updated according to the SGPU mechanism where a

significant change is plus or minus 0.07 degrees C (0.13 degrees F).

74-2958— 1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER