MPU Series B
Ultrasonic Gas Flow Meter
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PRD-0000022543 Rev. 00D Page 17 of 28
MNKS008 0.0 (4/08)
5. REGISTER MAPPINGS FOR THE DECA
CALCULATIONS
The DECA algorithms running on the MPU uses a separate set of
ModBus registers. These are described in this chapter.
5.1. External Input Values
The table below identifies external input values required by the
DECA algorithms.
Object
number
ModBus
Address
Description Unit
10000 20000 Line Pressure
barA
10001 20002 Line Temperature C
10002 20004 Gas Density at Line Conditions, external
source
kg/m
3
5.2. Mode Parameters
Object
number
ModBus
Address
Description Unit
710 1420 DECA Algorithm Selection:
0. No DECA calculations performed
1.DECA A
2.DECA B
3. DECA C
-
This is a 32-bit integer value.
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