MCP3909RD-3PH1 Microchip Technology, MCP3909RD-3PH1 Datasheet - Page 61

• Manufacturer Part Number: MCP3909RD-3PH1
• Description: REF DESIGN MCP3909 3PH ENGY MTR
• Manufacturer: Microchip Technology

Specifications of MCP3909RD-3PH1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: No
• Utilized Ic / Part: MCP3909, PIC18F2520, PIC18F4550
• Primary Attributes: 3-Ph, 220 VAC, In Case, LCD, USB, GUI
• Secondary Attributes: Opto-Isolated Interface for Safety
• Operating Voltage: 220 V
• Operating Current: 5 A
• Description/function: Energy Meter
• For Use With/related Products: MCP3909
• Lead Free Status / RoHS Status: Not applicable / Not applicable

6.4
FIGURE 6-2:
© 2008 Microchip Technology Inc.
RESULTS FRAME
This frame shows the present readings coming back from the meter, contains buttons
for calibration control, contains a frame for all the registers in the PIC18F2520, and
contains a frame to input the meter design constants such as calibration current,
maximum current, meter constant, and others.
Main Screen with Results Frame Active.
The results frame contains the current power and energy measurement results from the
three phases. The registers in this frame are continually polled from the USB device
and refreshed on the PC side every 2.5 seconds.
The following registers represent the results that are ready from the meter in this area
of the software. The text boxes in the results frame that are totals, are the sum of the
three phases. This total is done on the software side, all other numbers in this frame
are the exact number that is read from the registers in Table 6-1.
TABLE 6-1:
Active Power, Phase A
Active Power, Phase B
Active Power, Phase C
Apparent Power, Phase A
Note 1:
3-Phase Energy Meter Calibration Software
Meter Reading
At the time of this software and document release, reactive power and reactive
energy is not supported. Contact Microchip for updated software and firmware that
will be available for these power quantities.
REGISTERS BEING READ FOR THE METER READING (NOTE 1)
Register
PHA_VA
PHC_W
PHA_W
PHB_W
273.2371 VA
102.88 W
104.22 W
103.77 W
Example
DS51643B-page 57