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System-10-LON Network Interface Installation Guide 07/13 - 0654-4 / 16751 Page 11
FLOATING POINT OUTPUT NETWORK VARIABLES
Description Variable Name SNVT Name Engineering Units Valid Range
Flow (volume) rate nvoVolRateLf SNVT_ow_f Liters/Sec 0 to 10
12
Flow (volume) total -1 nvoVol1Lf SNVT_vol_f Liters 0 to 10
12
Flow (volume) total -2 nvoVol2Lf SNVT_vol_f Liters 0 to 10
12
Supply temperature nvoSupplyTempf SNVT_temp_f ° C -17.778 to 148.889
Return temperature nvoReturnTempf SNVT_temp_f ° C -17.778 to 148.889
Energy rate nvoEnrRateWf SNVT_power_f Watts 0 to 10
12
*Displayed energy rate nvoDispEnrRatef SNVT_count_f *See note 0 to 10
12
Energy total -1 nvoBTU1f SNVT_BTU_f Btu 0 to 10
12
*Displayed energy total-1 nvoDispEnergy1f SNVT_count_f *See note 0 to 10
12
Energy total-2 nvoBTU2f SNVT_BTU_f Btu 0 to 10
12
*Displayed energy total-2 nvoDispEnergy2f SNVT_count_f *See note 0 to 10
12
Auxiliary pulse input (Di3) nvoAuxIn1 SNVT_count_f None 0 to 10
12
* These network variables transmit energy rate and total data exactly as it is displayed on the
System-10 front panel display. The value transmitted will not include any multiplier associated
with displayed total.
The ASCII character status output network variables are described in the table below.
Column 1 contains a brief description of the network variables. Column 2 contains the
network variable names. Column 3 contains the Lon SNVT used for each variable.
Column 4 contains the ASCII single characters that may be transmitted by the meter
along with a description of what they indicate.
ASCII STATUS OUTPUT NETWORK VARIABLES
Description Variable Name SNVT Name Valid ASCII Characters*
Meter operating
mode indicator
nvoMeterMode SNVT_char_ascii
S = Single mode (83)
D = Dual mode (68)
B = Bidirectional mode (66)
Mode status
indicator
nvoModeStatus SNVT_char_ascii
N = Communication lost (78)
Z = Communication restored waiting for
update (90)
H = Heating mode (mode 1) (72)
C = Cooling mode (mode 2) (67)
F = Forward ow (mode 1) (70)
R = Reverse ow (mode 2) (82)
* Systems that are not set to decode ASCII characters will display the decimal equivalent.
These values are shown in parentheses.
1.7.2 Integer Format Output Network Variables
ONICON provides rate and total data to the network in integer format for systems that
cannot accept the oating point data. Refer to Appendices 4 and 5 for information on the
use of integer format SNVTs.
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