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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,

/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

, Gallons or Ft

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

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

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 27

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