ONICON System-30 LonWorks BTU - Manual (Page 23)

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System-30 BTU Measurement System LON 05/14 - 0668-2 / 18337
Page 23
4.6.6 Rollover of Totals
The totals stored in the flow Btu meter memory will roll over to zero when the maximum
count is exceeded. When this occurs, the network totals will also roll over to zero. The
point at which the rollover occurs is a function of the displayed engineering units and
multipliers programmed into the System-30.
The examples below show the rollover point in the engineering units transmitted by the
network variable (SNVT) for common totals shown on the System-30-LON BTU Meter.
VOLUME TOTAL
System-10 BTU Meter
Engineering Units
System-10 BTU
Meter
Multiplier
LonWorks SNVT and
Transmitted
Engineering Units
Maximum Total Transmitted
Over the Network
Gallons X 100 SNVT_vol_f – Liters 3,785,411,621 Liters
Liters X 1000 SNVT_vol_f – Liters 9,999,999,000 Liters
M³ X 1 SNVT_vol_f – Liters 9,999,999,000 Liters
ENERGY TOTAL
System-10 BTU Meter
Engineering Units
System-10 BTU
Meter
Multiplier
LonWorks SNVT and
Transmitted
Engineering Units
Maximum Total Transmitted
Over the Network
Btu X 10k SNVT_Btu_f – Btu 99,999,990,000 Btu
kWhr X 10 SNVT_Btu_f – Btu 341,214,065,900 Btu
Tonhr X 1 SNVT_Btu_f – Btu 119,999,998,000 Btu