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WattNode LonWorks Option B Variable List


The following table lists all the variables in the Option B WattNode® for LonWorks® with Option B. These are all LonMark® SNVTs (standard network variable types).

SNVT# Name SNVT Type Size (bytes) LonTalk Type Units Description
0 nviRequest SNVT_obj_request 3 structure Object request
1 nvoStatus SNVT_obj_status 6 structure Object status
2 nviTimeSet* SNVT_time_stamp 7 structure Set current date/time
3 nviCalSel SNVT_count 2 unsigned long Calibration variable selector
4 nviCal SNVT_power_f 4 floating point Calibration value
5 nvoPowerSum SNVT_power_f 4 floating point watts Real power, sum of phases
6 nvoPower[0] SNVT_power_f 4 floating point watts Real power, phase A
7 nvoPower[1] SNVT_power_f 4 floating point watts Real power, phase B
8 nvoPower[2] SNVT_power_f 4 floating point watts Real power, phase C
9 nciCtAmps_f* SNVT_amp_f 4 floating point amps CT rated current
10 nciPwrUpdtT* SNVT_elapsed_tm 7 structure Time between power variable updates
11 nvoEnergySum* SNVT_elec_whr_f 4 floating point watt-hr Total positive energy
12 nvoEnergy[0]* SNVT_elec_whr_f 4 floating point watt-hr Net energy, phase A
13 nvoEnergy[1]* SNVT_elec_whr_f 4 floating point watt-hr Net energy, phase B
14 nvoEnergy[2]* SNVT_elec_whr_f 4 floating point watt-hr Net energy, phase C
15 nciEngyUpdtT* SNVT_elapsed_tm 7 structure Time between energy variable updates
16 nvoPfAvg SNVT_pwr_fact_f 4 floating point Power factor, total
17 nvoPf[0] SNVT_pwr_fact_f 4 floating point Power factor, phase A
18 nvoPf[1] SNVT_pwr_fact_f 4 floating point Power factor, phase B
19 nvoPf[2] SNVT_pwr_fact_f 4 floating point Power factor, phase C
20 nvoReacPwrSum SNVT_power_f 4 floating point VAR Reactive power, sum of phases
21 nvoReacPwr[0] SNVT_power_f 4 floating point VAR Reactive power, phase A
22 nvoReacPwr[1] SNVT_power_f 4 floating point VAR Reactive power, phase B
23 nvoReacPwr[2] SNVT_power_f 4 floating point VAR Reactive power, phase C
24 nciReacUpdtT* SNVT_elapsed_tm 7 structure Time between reactive power updates
25 nvoReacEngySum* SNVT_elec_whr_f 4 floating point VARh Total net reactive energy
26 nvoVolts[0] SNVT_volt_f 4 floating point volts RMS voltage, phase A
27 nvoVolts[1] SNVT_volt_f 4 floating point volts RMS voltage, phase B
28 nvoVolts[2] SNVT_volt_f 4 floating point volts RMS voltage, phase C
29 nvoCurrent[0] SNVT_amp_f 4 floating point amps RMS current, phase A
30 nvoCurrent[1] SNVT_amp_f 4 floating point amps RMS current, phase B
31 nvoCurrent[2] SNVT_amp_f 4 floating point amps RMS current, phase C
32 nvoFreq SNVT_freq_f 4 floating point Hz Line frequency
33 nvoDemand SNVT_power_f 4 floating point watts Demand power (average power over demand period)
34 nvoPkDemand* SNVT_power_f 4 floating point watts Peak demand power
35 nvoPeakDemT* SNVT_time_stamp 7 structure Date/time of peak demand
36 nviLogRequest SNVT_count 2 unsigned long See below
37 nvoLogData SNVT_str_asc 31 string Not used (see below)
38 nciDemPerMins* SNVT_count 2 unsigned long 1 minute Demand period: 5-720 minutes. Default 15 minutes
39 nciDemSubints* SNVT_count 2 unsigned long Rolling demand subinterval count: 1-8. Default 1 subinterval

*These network variables are preserved across power failures.

VarList-WncFtOptB.xls – Downloadable version of this table.

See Also