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71M6534 Datasheet(PDF) 100 Page - Maxim Integrated Products

Part No. 71M6534
Description  Exceeds IEC 62053/ANSI C12.20 Standards
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
Logo MAXIM - Maxim Integrated Products

71M6534 Datasheet(HTML) 100 Page - Maxim Integrated Products

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71M6533/G/H and 71M6534/H Data Sheet
FDS_6533_6534_004
100
Rev 2
[1]
PULSE_FAST
0
When PULSE_FAST = 1, the pulse generator input is increased
16x. When PULSE_SLOW = 1, the pulse generator input is
reduced by a factor of 64. These two bits control the pulse
gain factor X (see table below). Default is 0 for both (X = 6).
PULSE_SLOW PULSE_FAST
X
0
0
1.5 * 22 = 6
0
1
1.5 * 26 = 96
1
0
1.5 * 2-4 = 0.09375
1
1
Do not use
[0]
PULSE_SLOW
0
Table 59: Sag Threshold and Gain Adjust Control
CE
Address
Name
Default
Description
0x24
SAG_THR
2.39*107
The voltage threshold for sag warnings. The default value is
equivalent to 80 V RMS if VMAX = 600 V. The LSB value is
VMAX * 7.8798*10-9 V. For example, if a sag threshold of 80
V RMS is required:
7
9
10
39
.
2
10
8798
.
7
2
80
_
=
=
VMAX
THR
SAG
0x40
GAIN_ADJ
16384
This register scales all voltage and current channels. The
default value is equivalent to unity gain (1.000).
5.3.8 CE Transfer Variables
When the MPU receives the XFER_BUSY interrupt, it knows that fresh data is available in the transfer
variables. CE transfer variables are modified during the CE code pass that ends with an XFER_BUSY
interrupt. They remain constant throughout each accumulation interval. In this data sheet, the names of
CE transfer variables always end with _X. The transfer variables can be categorized as:
1. Fundamental energy measurement variables
2. Instantaneous (RMS) values
3. Other measurement parameters
Fundamental Energy Measurement Variables
Table 60 describes each transfer variable for fundamental energy measurement. All variables are signed
32-bit integers. Accumulated variables such as WSUM are internally scaled so they have at least 2x
margin before overflow when the integration time is one second. Additionally, the hardware will not
permit output values to fold back upon overflow.
Table 60: CE Transfer Variables
CE
Address
Name
Description
0x85
WSUM_X
The signed sum: W0SUM_X+W1SUM_X+W2SUM_X.
0x86
W0SUM_X
The sum of Wh samples from each wattmeter element. In_8 is the
gain 1 or 8 as configured by In_SHUNT.
LSB = 9.4045*10-13 VMAX IMAX / In_8 Wh.
0x87
W1SUM_X
0x88
W2SUM_X
0x8A
VARSUM_X
The signed sum: VAR0SUM_X+VAR1SUM_X+VAR2SUM_X.
0x8B
VAR0SUM_X
The sum of VARh samples from each wattmeter element. In_8 is the
gain 1 or 8 as configured by In_SHUNT.
LSB = 9.4045*10-13 VMAX IMAX / In_8 VARh.
0x8C
VAR1SUM_X
0x8D
VAR2SUM_X


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