Sqsum i lsb 0 2, Varh wh va, Sqsum v lsb 0 2 – Maxim Integrated 71M6521BE Energy Meter IC Family Software User Manual
Page 75
71M652X Software User’s Guide
Revision 1.7
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© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
Name
Purpose
Function or LSB Value
CLI
Format
L in
bits
XDATA
IThrshldA Starting
current,
element A
SQSUM
I
LSB
0
2
16
=
0 in this position disables creep
logic for both element A and B.
)0 unsigned
32 0x0000
Config Configure
meter
operation on the fly.
bit 0:** reserved
0: VA = Vrms * Irms;
1:
2
2
VARh
Wh
VA
+
=
bit1:* 1 = Clears accumulators
bit2:*1 = Calibration mode
bit3:** reserved: 1 = enable
tamper detection
)1 N/A
8 0x0004
VPThrshld
error if exceeded.*
SQSUM
V
LSB
0
2
16
=
)2 unsigned
32 0x0005
IPThrshld
error if exceeded.*
SQSUM
I
LSB
0
2
16
=
)3 unsigned
32 0x0009
Y_Cal_Deg0 RTC
adjust
100ppb
)4 signed 16 0x000D
Y_Cal_Deg1
RTC adjust, linear by
temp.*
10ppb*ΔT, in 0.1?C
)5
signed
16
0x000F
Y_Cal_Deg2 RTC
adjust,
squared
by temp.*
1ppb*ΔT
2
, in 0.1?C
)6
signed
16
0x0011
PulseWSource
PulseVSource
Wh Pulse source,
VARh pulse source
selection*
See table for PulseWSource and
PulseVSource
)7
)8
unsigned 8
0x0013
0x0014
Vmax Scaling
Maximum
Voltage for PCB,
equivalent to 176mV
at the VA/VB pins
0.1V )9
unsigned
16
0x0015
ImaxA Scaling
maximum
current for PCB,
element A, equi-
valent to 176mV at
the IA pin
0.1A )A
unsigned
16
0x0017
ppmc1
ADC linear adjust
with temperature
PPM per degree centigrade
)B
signed
16
0x0019
ppmc2
ADC quadratic adjust
with temperature
PPM per degree centigrade
squared
)C signed 16 0x001B
Pulse 3 source
Source for software
pulse output 3**
See table for PulseWSource and
PulseVSource
)D unsigned
8 0x001D
Pulse 4 source Source for software
pulse output 4**
See table for PulseWSource and
PulseVSource
)E unsigned
8 0x001E
Scal
Duration for auto-
calibration** in
seconds
Count of accumulation intervals to
be used for auto-calibration.
)F unsigned
16 0x001F
Vcal
Voltage value to be
used for auto-
calibration**
Nominal RMS voltage applied to
all elements during auto-
calibration (LSB = 0.1V).
)10 unsigned 16 0x0021