UG-572 Datasheet, PDF (15/20 Pages) Winchester Electronics Corporation – C JACK

EVAL-ADE7978EBZ User Guide
TOTAL REACTIVE POWER
The Total Reactive Power window is shown in Figure 23.
This window is very similar to the Total Active Power window
except the registers and switches are changed to reflect the
reactive power data path. This window shows the signal path
for the reactive power with the diagram displaying all relevant
register values.
• At the top left is Active Data Path. Here the desired phase
to be shown in the window can be chosen and all the
register values change with the phase.
• ACCMODE register settings is where the accumulation
mode can be changed with ACCMODE.3,2. The con-
nection setup can be changed with ACCMODE.5,4. Total
or fundamental power can be used to trigger interrupt
registers with ACCMODE.7
• The CONFIG register setting is used to swap the voltage
and current channel outputs.
• Under that is a drop-down box, Choose a Phase Voltage,
in which a different phase voltage can be used along with
the phase current to do the calculations.
• To the right of this, the No Load Thresholds can be set.
• CFx Configuration opens another window to setup the
CF outputs.
• Read Energy Registers opens another window to read
the energy register with multiple settings (for example,
synchronous with CF, line cycle accumulation).
• Exit returns to the main menu.
• Read reads the current configuration of the part and the
energy register values.
• Write writes the current configuration to the registers.
• The middle left has a Read with reset button to enable or
disable the register being reset after a read function.
UG-572
APPARENT POWER
The Apparent Power window is shown in Figure 24. This
window is similar to the Total Active Power window except the
registers and switches are changed to reflect the apparent power
data path. The diagram is for the apparent power signal path
and shows all relevant registers.
• At the top left is Active Data Path where the desire phase
to be shown in the window can be chosen and all the
register values change with the phase.
• To the right is the COMPMODE register settings box and
the switches are used to change the calculation of apparent
power. It is calculated with either xVRMS or VNOM.
• The CONFIG register settings is used to swap the voltage
and current channel outputs.
• To the right of this, the No Load Thresholds can be set.
• CFx Configuration opens another window to setup the
CF outputs.
• Read Energy Registers open another window to read
the energy register with multiple settings (for example,
synchronous with CF or line cycle accumulation).
• Exit returns to the main menu.
• Read reads the current configuration of the part and the
energy register values.
• Write writes the current configuration to the registers.
• The middle left has a Read with reset button to enable or
disable the register being reset after a read access.
Figure 23. Total Reactive Power
Figure 24. Apparent Power
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