30 LonTalk Communication Interface • ACC-SVN100A-EN
Network Variable and Configuration Property Definitions
nvoActualCap
Actual running capacity, SNVT_lev_percent
This network variable provides the level of capacity at which the chiller is currently
operating. It may be more or less than the nominal value of the chiller’s capacity.
• Default: 0x7FFF = 163.835%
• Invalid value: 0x7FFF = 163.835%
nvoAirFlowPctC1
Air flow percent—circuit 1, SNVT_lev_percent
This network variable provides the approximate air flow percentage of circuit 1.
• Default: 0x7FFF = 163.835%
• Invalid value: 0x7FFF = 163.835%
nvoAirFlowPctC2
Air flow percent—circuit 2, SNVT_lev_percent
This network variable provides the approximate air flow percentage of circuit 2.
• Default: 0x7FFF = 163.835%
• Invalid value: 0x7FFF = 163.835%
nvoAlarmDescr
Alarm description, SNVT_str_asc
This network variable provides alarm messages based on manufacturer-determined
criteria. Alarm text will vary significantly based on the chiller model. See the
corresponding chiller literature for more details on the diagnostics. The format will be as
follows: “s nnnnnnnnnnnnnnnnnnnnnnnnnnnnn”
s Indicates the severity of the diagnostic. There are five possibilities. There is an
ASCII space between s and the first n.
P = normal, last reset resulted from a power up
0 = normal, last reset was not from power up
1 = informational message (handle at next scheduled routine maintenance)
2 = service required (handle at normal rates during normal working hours)
3 = critical alarm (handle now, cost is no object)
n Represents 29 ASCII characters that form the human readable message. The last
n must be null (0x00). Can be less than 29 ns, but not more.
For 0 or P this text must be Normal
• When transmitted: It is transmitted when a diagnostic occurs
• Update rate: Update occurs no faster than the configured min send time
