Maxim Integrated 71M6541 Demo Board User Manual
Page 28
71M6541 Demo Board REV 3.0 User’s Manual
28
Rev 4.0
state_bit_ar
y
Status of meter.
Nonvolatile.
Bits:
See table below.
0 = no errors
)30
unsigned
32
wh_im
Wh energy register.
Nonvolatile.
First 32-bit number is a count of
pulses, =3.2 Wh in 3-phase me-
ters, or 1 in 1-phase. A fractional
pulse is present in the CE data,
but not preserved.
n/a
)31
64
wh_ex
Wh exported energy
register. Nonvola-
tile.
Like wh_im
n/a
)32
64
varh_im
VARh register.
Nonvolatile.
Like wh_im
n/a
)33
64
varh_ex
VARh exported reg-
ister. Nonvolatile.
Like wh_im
n/a
)34
64
dmd_max
Maximum demand,
W
Units of w0sum
n/a
)35
signed
32
dmd_max_rtc
Time of maximum
demand.
Standard time and date struc-
ture.
year, month,
date, hour, min
)36..
3A
unsigned
7x8
v_bat
Battery voltage at
last measurement.
Volatile; not saved
on power failure.
0.1V
n/a
)3B
signed
8
acc_cnt
Count of accumula-
tion intervals since
reset, or last clear.
Cleared with )1=2 or
meter read. Volatile;
not saved on power
failure.
count
n/a
)3C
signed
32
tamper_sec
Counts seconds
that tamper errors
were asserted.
Cleared with )1=2 or
meter read. Nonvol-
atile.
This is a tamper measurement.
n/a
)3D
signed
32
sag_sec
Counts seconds
that voltage low
error occurred. or
meter read. Nonvol-
atile.
This is a power quality meas-
urement.
n/a
)3E
signed
32
in_sec
3
Counts seconds
that neutral current
error was asserted.
Cleared with )1=2 or
meter read. Nonvol-
atile.
This is a power quality meas-
urement.
n/a
)3F
signed
32
rtc_copy
Clock time and date
when data was last
read from the RTC.
Standard time and date struc-
ture. year, month, date, hour,
min, sec
n/a
)40..
45
unsigned
8*7
save_cnt
Number of power
register saves.
n/a
n/a
)46
unsigned
16
data_ok_reg
Checks data.
n/a
n/a
)47
unsigned
16
1
Valid only when autocalibration is integrated. Meters with metering equations with differential currents or voltages do not
normally support autocalibration.
2
Requires features not in some demo PCBs.