Honeywell W7750A NviFree1 Value, Auxiliary functions. nviFree1 controls the FREE1OUT, 255 74-2958

Table 22. Energy Management 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

nviFree1

value

0 to 100

0

Free1.value network variable controls the spare or Free digital output for

auxiliary functions. nviFree1 controls the FREE1_OUT,

FREE1_OUT_PULSE_ON, and FREE1_OUT_PULSE_OFF outputs (only

one of these DO selections per controller is allowed). The states have the

following meaning: If the state is SW_OFF, the corresponding free logical

output (and therefore the physical output, if configured) is off. If the state is

SW_ON and the value is 0, then the corresponding free logical output (and

therefore the physical output, if configured) is off. 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 corresponding free logical

output (and therefore the physical output, if configured) is on. If the state is

SW_NUL or other, then the network variable is not bound, the

communications path from the sending node has failed, or the sending node

has failed. The corresponding free logical output does not change if the

network variable input fails.

DestFree1

nviFree1

state

SW_OFF

0

SW_NUL

M

X

X

X

X

Refer to Free1.value.

SW_ON

1

SW_NUL

255

79

nviFree2

value

0 to 100

0

Free2.value behaves the same as Free 1 value.

DestFree2

nviFree2

state

SW_OFF

0

SW_NUL

M

X

X

X

X

Refer to Free2.value.

SW_ON

1

SW_NUL

255

nviWSHPEnable

value

0 to 100

0

WSHPEnable.value is used to enable the compressor stages in heat pump

applications. Typically nviWSHPEnable is bound to a water flow sensor that

detects heating/cooling water supplied to the heat pump. If there is no water

flowing the compressor is disabled. If the state is SW_OFF, the compressor

is disabled in heat pump applications. If the state is SW_ON and the value

is 0, the compressor is disabled in heat pump applications. 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, the compressor is enabled in

heat pump applications. If the state is SW_NUL or other, the network

variable is not bound and is ignored.

DestWSHPEnable

nviWSHPEnable

state

SW_OFF

0

SW_NUL

X

Refer to WSHPEnable.value.

SW_ON

1

SW_NUL

255

74-2958— 1

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER