Maxim Integrated 71M6533-DB - Manual (Page 30)

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 2 VxSQSUM
 
LSB
0x25
0x27
0x29 Irms_A
Irms_B
Irms_C
Irms_N
I
rms
from element 0, 1, 2 or neutral
16 2 IxSQSUM
 
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