ONICON System-10 BACnet - Manual (Page 21)

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System-10-BAC Network Interface Installation Guide 04/14 - 0652-8 / 16957
Page 21
2.2 BAC OBJECTS
The System-10 BTU Meter operates in one of three operating modes: single, dual or bi-directional.
The table on the next page contains point information for each of the operating modes.
In single mode operation, only one register accumulates energy and one register accumulates
volume. Thus, only two AV points and two BV reset points are necessary.
BACNET OBJECT OBJECT DESCRIPTION UNITS NOTES
Analog Input 1 Energy Rate Btu/Hr, kW or Tons
Analog Input 2 Volume Rate L/Sec, L/Min, L/Hr,
M 3 /Hr, GPM, CFS or
CFM
Analog Input 3 Supply Temperature Degrees C or F
Analog Input 4 Return Temperature Degrees C or F
Analog Value 1 Mode 1 Energy Total Btu, TonHrs or kWHrs
Analog Value 2 Mode 1 Volume Total Liters, M 3 , Gallons or Ft 3
Analog Value 3 Mode 2 Energy Total Btu, TonHrs or kWHrs Only used in dual-mode
applications.
Analog Value 4 Mode 2 Volume Total Liters, M 3 or Gallons Only used in dual-mode
applications.
Analog Value 5 Auxiliary Input Total
(Di3)
None BACnet will not report
engineering units for this
object.
Analog Value 6 Operating Mode
(Single, Dual or
Bi-directional)
Not Applicable None = 0
Single = 1
Dual = 2
BiDir = 3
Analog Value 12 Mode 1 Mode 2
Indication
Not Applicable Mode 1 = 1
Mode 2 = 2
Binary Value 11 Zero Mode 1 Energy
Total Not Applicable Changing this property
from the (0) inactive state
to the (1) active state will
reset the total to zero.
(Must be priority 8 manu-
al operator).
Binary Value 12 Zero Mode 1 Volume
Total Not Applicable
Binary Value 13 Zero Mode 2 Energy
Total Not Applicable
Binary Value 14 Zero Mode 2 Volume
Total Not Applicable
Binary Value 15 Zero Auxiliary Input
Total Not Applicable