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71M6515H
A Maxim Integrated Products Brand
Energy Meter IC
DATA SHEET
JULY 2011
Value in Pulse
Source Register
(hex) (dec)
Name
Description
VMAX V 2 h
LSB = 9.4045*10
VMAX IMAX / In_8 Wh
LSB = 9.4045*10
VMAX IMAX / In_8 VARh
LSB = 9.4045*10
VMAX IMAX / In_8 Wh
LSB = 9.4045*10
LSB = 9.4045*10
VMAX IMAX / In_8 VARh
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x1D
0x1E
0x1F
0x20
0x21
0x22
0x23
0x24
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
VASQSUM
VBSQSUM
VCSQSUM
WSUM_I
WASUM_I
WBSUM_I
WCSUM_I
VARSUM_I
VARASUM_I
VARBSUM_I
VARCSUM_I
WSUM_E
WASUM_E
WBSUM_E
WCSUM_E
VARSUM_E
VARASUM_E
VARBSUM_E
VARCSUM_E
Internal (CE)
External
(host)
The sum of squared voltage samples from each element.
-13 2
Imported Energy: W0SUM_I + W1SUM_I + W2SUM_I
Imported energy from individual wattmeter elements. Never negative.
-13
Imported VARh:
VAR0SUM_I + VAR1SUM_I + VAR2SUM_I
Exported reactive energy from individual wattmeter elements. Never negative.
-13
Exported Energy: W0SUM_E + W1SUM_E + W2SUM_E
Exported energy from individual wattmeter elements. Never negative.
-13
Exported VARh:
VAR0SUM_E + VAR1SUM_E + VAR2SUM_E
Exported reactive energy from individual wattmeter elements. Never negative.
-13
Connects the pulse generator to the WSUM or VARSUM values internally
calculated by the CE. Not selectable for PULSE3 and PULSE4 pulse generators.
Indicates that the host will provide values in the APULSER, APULSEW,
APULSE3, and APULSE4 registers and that the pulse generator should be up-
dated on the next READY interrupt..
Table 6: Pulse Sources Defined by the PULSE_SRCS Register (2/2)
WRATE (0x2D)
This register controls the rate of the pulse generation for the PULSEW, PULSER, PUSE3 and PULSE4 output pins. The
inverse pulse rate, expressed as Wh per pulse is:
Kh =
VMAX IMAX
In _ 8 ? SUM _ CYCLES ? WRATE ? X
1 . 5757 Wh / Pulse (X = value formed by PULSE_SLOW and
PULSE_FAST bits in the CONFIG register)
Page: 35 of 60
? 2005 ? 2011 Teridian Semiconductor Corporation
1.6
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