User guide

71M6533-DB Demo Board User’s Manual
Page: 30 of 75 ` REV 3
Number
Pulse
Source
Description
Number
Pulse
Source
Description
8
I0SQSUM
26
VAR1SUM_I
Imported reactive energy on
element C
9
I1SQSUM
27
WSUM_E
Sum of exported real energy
10
I2SQSUM
28
W0SUM_E
Exported real energy on element
A
11
INSQSUM
29
W1SUM_E
Exported real energy on element
B
12
V0SQSUM
30
W2SUM_E
Exported real energy on element
C
13
V1SQSUM
31
VARSUM_E
Sum of exported reactive energy
14
V2SQSUM
32
VAR0SUM_E
Exported reactive energy on
element A
15
VASUM
33
VAR1SUM_E
Exported reactive energy on
element B
16
VA0SUM
34
VAR2SUM_E
Exported reactive energy on
element C
17
VA1SUM
Table 1-5: Selectable Pulse Sources
MPU INSTANTANEOUS OUTPUT VARIABLES
The Demo Code processes CE outputs after each accumulation interval. It calculates instantaneous values
such as VRMS, IRMS, W and VA as well as accumulated values such as Wh, VARh, and VAh. Table 1-6 lists
the calculated instantaneous values.
XRAM
Word
Address
Name
DESCRIPTION
0x24
0x26
0x28
Vrms_A
Vrms_B*
Vrms_C
V
rms
from element 0, 1, 2.
16
2VxSQSUM LSB
0x25
0x27
0x29
Irms_A
Irms_B
Irms_C
Irms_N
I
rms
from element 0, 1, 2 or neutral
16
2IxSQSUM LSB
0x20
Delta_T
Deviation from Calibration (reference) temperature.
LSB = 0.1
0
C.
0x21
Frequency
Frequency of voltage selected by CE input. If the selected voltage is below
the sag threshold, Frequency=0. LSB Hz
Table 1-6: MPU Instantaneous Output Variables