MCP3909RD-3PH1 Microchip Technology, MCP3909RD-3PH1 Datasheet - Page 31

• 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

3.4.15
3.4.16
3.4.17
© 2008 Microchip Technology Inc.
PIC18F2520 Calculation and Register Description
PHy_VA_RAW
PHy_VA
PHy_VAR_RAW (NOT IMPLEMENTED)
REGISTER 3-15:
These registers are the raw phase y apparent power. Unlike active power, this is simply
the multiplication of voltage (PHy_V_RMS) times current (PHy_I_RMS). This is the
register that should be read during calibration for calculating the gain values associated
with apparent phase A power, PHy_VA_GAIN and PHy_VA_GLSB. This register is
overwritten every LINE_CYC line cycles (written only once if calibration is enabled).
REGISTER 3-16:
This is the value for phase y apparent power. The goal of calibration is to get this value
to equal X 0.1 mVA/LSB. This is done with the PHy_VA_GLSB registers. When display-
ing the apparent power for phase y, simply display the value in these registers with the
decimal point one digit in from the right, in milli-volt-amperes. (Note this decimal point
location, or LSB resolution of 0.1 mVA, is specific for the 5(10)A, 220V rating that this
meter is designed for). This register is overwritten every LINE_CYC line cycles (written
only once if calibration is enabled).
REGISTER 3-17:
This is the raw phase y reactive power. This is the register to be read during calibration
for calculating the gain values associated with reactive phase y power,
PHy_VAR_GAIN and PHy_VAR_GLSB. This register is overwritten every LINE_CYC
line cycles (written only once if calibration is enabled).
NOT IMPLEMENTED IN THIS FIRMWARE/SOFTWARE RELEASE.
PHC_VAR_RAW
PHA_VAR_RAW
PHB_VAR_RAW
PHA_VA_RAW
PHB_VA_RAW
PHC_VA_RAW
PHA_VA
PHB_VA
PHC_VA
Name
Name
Name
PHY_VA_RAW REGISTERS
PHY_VA REGISTERS
PHY_VAR_RAW REGISTERS
Bits
Bits
Bits
48
48
48
32
32
32
48
48
48
Address
Address
Address
0x0AC
0x08E
0x09C
0x0A0
0x0A6
0x082
0x088
0x094
0x098
Cof
Cof
Cof
R
R
R
R
R
R
R
R
R
DS51643B-page 27