Honeywell W7750A specifications Last NET, Offset Absolutemiddle, None Normal, Bypassonly

Table 25. Configuration Parameters. (Continued)

Value

Digital

E-Vision

Direct

Hardware

Manual

NOTE: Physical I/O points that are configurable are in Table 20.

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

OvrdPriority

nciConfig

OverridePriority

LAST

0

NET

P

X

X

OverridePriority configures the override arbitration between ManOcc,

NET

1

Bypass.state, and the wall module override button. If OverridePriority is 0

(LAST), then the last command received from either the wall module or

iManOcc determines the effective override state. If OverridePriority is 1

(NET), this specifies that when ManOcc is not OC_NUL, that the effective

occupancy is ManOcc regardless of the wall module override state.

UseWallModStpt

nciConfig

UseWallModStPt

FALSE

0

TRUE

P

X

X

UseWallModStpt specifies the OC_OCCUPIED temperature setpoint

TRUE

1

source. If UseWallModStpt is 0 (FALSE), then the occupied TempSetPts

are used when the effective occupancy is OC_OCCUPIED. If

UseWallModStpt is 1 (TRUE), then the wall modules setpoint knob is used

when the effective occupancy is OC_OCCUPIED. SetPt overrides all.

SetPtKnob

nciConfig

SetPntKnob

OFFSET

0

ABSOLUTE_MIDDLE

P

X

X

SetPntKnob specifies the usage of the setpoint knob when

ABSOLUTE_MIDDLE

1

UseWallModStPt is TRUE. When SetPntKnob is 0 (ABSOLUTE_MIDDLE),

the setpoint knob directly determines the center point of between the

OC_OCCUPIED cooling and heating setpoints. When SetPntKnob is 1

(OFFSET), the effective setpoint is calculated by adding the remote

setpoint potentiometer value (center scale = 0) to the appropriate value of

TempSetPts.

97

OvrdType

nciConfig

OverrideType

NONE

0

NORMAL

P

X

X

OverrideType specifies the behavior of the override button. If the

NORMAL

1

OverrideType is 0 (NONE) then the override button is disabled. An

BYPASS_ONLY

2

OverrideType of 1 (NORMAL), causes the override button to set the

OverRide state to OC_BYPASS for Aux2SetPt.BypassTime seconds when

the override button has been pressed for approximately 1 to 4 seconds, or

to set the OverRide state to UNOCC when the button has been pressed for

approximately 4 to 7 seconds. When the button is pressed longer than

approximately 7 seconds, then the OverRide state is set to OC_NUL. If the

OverrideType is 2 (BYPASS_ONLY), the override button sets the OverRide

state to OC_BYPASS for Aux2SetPt.BypassTime seconds on the first

press. On the next press, the OverRide state is set to OC_NUL.

Table 26. LONMARK® /Open System Points.

ValueofState

DigitalStateor

E-Vision(M,P,S)

Share

Map

DirectAccess

HardwareConfig.

ManualConfig.

FailureDetect

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

Engineering Units: English

User Address

NvName

Field Name

(Metric) or States plus Range

Default

Comments

nciNodeSendT

Seconds

0

The maximum time between updates of network variable outputs from the

(SNVT_time_sec)

node object.

nciRtuSendT

Seconds

0

The SGPUC and SGPU time (heart beat time) between updates of network

(SNVT_time_sec)

variable outputs.NOTE: RtuSendT should be set to 55 seconds by a

74-

management node to be compatible with a Honeywell system.

nciRtuRcvT

Seconds

0

This is the failure detection time for network SGPUC and SGPU variables

2958

(SNVT_time_sec)

outputs.NOTE: RtuRcvT should be set to 300 seconds by a management

node to be compatible with a Honeywell system.

— 1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER