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EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
79 74-2958—1
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
SW_ON
SW_NUL
0
1
255
SW_NUL M X X X X Refer to Free1.value.
nviFree2 value 0 to 100 0 Free2.value behaves the same as Free 1 value.
DestFree2 nviFree2 state SW_OFF
SW_ON
SW_NUL
0
1
255
SW_NUL M X X X X Refer to Free2.value.
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
SW_ON
SW_NUL
0
1
255
SW_NUL X Refer to WSHPEnable.value.
Table 22. Energy Management Points. (Continued)
User Address NvName Field Name
Engineering Units: English
(Metric) or States plus Range
Digital State or
Value of State
Default
E-Vision (M, P, S)
Share
Map
Direct Access
Hardware Config.
Manual Config.
Failure Detect
E-Vision Legend: (M) Monitor, (P) Parameter, (S) Schematic
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