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D-100 Dual Network Interface Installation Guide 03/18 - 1015-2 / 35094 Page 29
3.3 TOTALIZATION, RESETTING TOTALS, OVER-RANGE & ROLLOVER
1. Integer Register Totalization
Holding registers 40026 through 40061 are integer registers that provide
totalized, volume and mass ow data in a variety of engineering units.
The registers are organized into pairs or groups of 3.
The rst (low order) register is limited to a range of 0 – 999. This register rolls
over to zero when the total value reaches 1,000. If the registers are in a group
of 3, the second register (middle order) is also limited to a range of 0 – 999.
This register also rolls over when the register value reaches 1,000.
The second, or in the case of groups of 3, third, (high order) register is scaled
such that the smallest incremental value indicated is 1,000 times greater than
the preceding register. An example of this is shown below.
Example - A group of 3 registers
Register Engineering Units & Scaling Current Value
40042 kGal (Gallons x 1,000) 00500
40043 MGal (Gallons x 1,000,000) 00015
40044 GGal (Gallons x 1,000,000,000) 00111
Low order + middle order + high order = Gallons Total = 111,015,500,000
or
kGal Total = 111,015,500
Registers 40062 and 40063 provide totalization for the optional auxiliary pulse input
option of the D-100. There are no engineering units associated with these registers.
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