Figure 5-31. Register Scaling Default Example - ABB TPU2000 Technical Manual

13: 40013 Offset Bipolar (12)
14: 40014 Offset Bipolar (12)
15: 40015 Offset Bipolar (12)
16: 40016 Unipolar (16)
17: 40017 Unipolar (16)
18: 40018 Offset Bipolar (12)
19: 40019 Unipolar (16)
20: 40020 Unipolar (16)
21: 40021 Neg Unipolar (16)
22: 40022 Neg Unipolar (16)
23: 40023 Unipolar (16)
24: 40024 Unipolar (16)
25: 40025 Neg Unipolar (16)
26: 40026 Neg Unipolar (16)
27: 40027 Unipolar (16)
28: 40028
29: 40029
30: 40030
31: 40031
32: 40032
An explanation of some of the above default mappings are offered as a guide to understanding the scaling
methodology implementation. Figure 5-31 illustrates the scaling procedure for remapped registers 40001 through
40032 Registers 257, 259, and 261 (as detailed in Table 5-11 above) contain the MMI reported current values to
be remapped and re-scaled to 12 bit Offset Bipolar Values.
The mathematics to determine the reported value to the host is illustrated in Figure 5-31 and using Equation 5
above.
TPU2000/2000R Modbus/Modbus Plus Automation Guide
40534 (32/Signed)
40536 (32/Signed)
40538 (32/Signed)
40158 (16/Unsigned)
40159 (16/Unsigned)
40399 (16/Unsigned)
40556 (32/Signed)
40556 (32/Signed)
40556 (32/Signed)
40556 (32/Signed)
40558 (32/Signed)
40558 (32/Signed)
40558 (32/Signed)
40558 (32/Signed)
40562 (16/Unsigned)
No Default No Default
No Default No Default
No Default No Default
No Default No Default
No Default No Default
32
Net work
Partner
DPU
S TAT US TA RGETS V1.0
2000R Mappable
A
NORMAL TIME
FAIL B INS TANTANEOUS
P ICKU P FREQUENC Y C
C
REC LOS ER OUT NEGATI V E S EQUENCE
N
Registers
SYS TEM RESE T TARGET RE SET
E
TPU2000R
Ia Current Mag.
Ib Current Mag.
Ic Current Mag.
DPU 2000(R) Register Contents
in Register 40002, 40003, or 40004
RTU or Host Reads 4095
RTU or Host Reads 2047
RTU or Host Reads 0

Figure 5-31. Register Scaling Default Example

1000 (Power)
1000 (Power)
1000 (Power)
1 (Normal)
1 (Normal)
10 (Current)
10000
(Normal)
10000
(Remainder)
10000
(Normal)
10000
(Remainder)
10000
(Normal)
10000
(Remainder)
10000
(Normal)
10000
(Remainder)
1 (Normal)
No Default
No Default
No Default
No Default
No Default
400001
OFFSET BIPOLAR
400002
12 bit resolution
400003
0 = (-) Full Scale
400004
(12 bits -1)
400005
2 - 1 = 2047 =
(12 bits)
2 - 1 = 4095 = (+) Full Scale
400032
REFERENCE TABLE 2
DPU 2000(R) MMI Display
or Register Contents of 40257, et al
(+) Full Scale = Scale * CT = 10* 100 = 1000
phase
0 Amperes
(-) Full Scale = - Scale * CT
Phase
Phase A VARs
Phase B VARs
Phase C VARs
Phase CT Ratio
PT Ratio
Load Current N
Pos 3 Phase
kWatthours (High)
Pos 3 Phase
kWatthours (Low)
Neg 3 Phase
kWatthours (High)
Pos 3 Phase
kWatthours (Low)
Pos 3 Phase
kVARhours (High)
Pos 3 Phase
kVARhours (Low)
Neg 3 Phase
kVARhours (High)
Neg 3 Phase
kVARhours (Low)
System Frequency
Spare
Spare
Spare
Spare
Spare
0
= - 10 * 100 =
- 1000
83