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EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
105 74-2958—1
SrcEconEnCt nvoEcon
(SNVT_switch)
value 0 to 100 0 X nvoEcon allows one controller to determine the suitability of outdoor air for
free cooling and share this with other nodes and is typically bound to Econ
on other nodes. If the economizer function is configured by
Config.EconEnable, Econ is periodically calculated from the local sensor
specified by Config.EconEnable and is sent on the network. Econ does not
affect Econ. The output has the following states: If the state is SW_OFF
and the value is 0, then the outdoor air is not suitable for free cooling. If the
state is SW_ON and the value is 100 percent, then the outdoor air is
suitable for free cooling. If the state is SW_NUL and the value is 0, the
corresponding economizer function is not enabled because
Config.EconEnable is ECON_NUL, DIFF_TEMP, or DIFF_ENTH or
because the selected sensor has failed.
SrcEconEnable nvoEcon
(SNVT_switch)
state SW_OFF
SW_ON
SW_NUL
0
1
255
SW_NUL M X X For nvoEcon.state, refer to nvoEcon.value.
Table 26. L
ON
M
ARK
®/Open System 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
Comments