MCP3909RD-3PH1 Microchip Technology, MCP3909RD-3PH1 Datasheet - Page 59

• 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

6.1
6.2
FIGURE 6-1:
© 2008 Microchip Technology Inc.
Chapter 6. 3-Phase Energy Meter Calibration Software
OVERVIEW
USING THE CALIBRATION SOFTWARE WITH THE USB INTERFACE
MODULE
LCD Display
This chapter is meant to serve as a user’s guide for Microchip’s energy meter
calibration software “3-Phase Energy Meter Calibration Software”. The software is
compatible with Windows
communicate to the energy meter, however, the commands are converted to RS-232
commands which are carried out on the PIC18F2520. The USB interface is solely for
the calibration software and meter connection.
To use the monitoring and calibration software on the PC you must have the USB
Interface Module installed on the main board of the MCP3909 3-Phase Energy Meter
Reference Design, OR have a customized meter and USB to RS-232 interface located
off the meter. This board does not have to be in the final meter design for RS-232
low-cost meters.
USB to RS-232 Communication.
The PIC18F4550 is set up as a full speed HID device (Host Interface Device). The USB
communication uses 64 byte reports. The full 64-byte report is 64 8-bit bytes with
values from 0x00 to 0xFF. The USB report structure will be the same as the RS-232
command structure from the PIC18F4550 to the PIC18F2520. This will allow a RS-232
version of the software to be easily written. The PIC18F4550 simply shifts these
commands from the USB port out the RS-232 port to the PIC18F2520.
PIC18F4550
Main Board and Meter Engine
RS-232
®
XP and Windows
METER REFERENCE DESIGN
USB
USB Interface Module
MCP3909 3-PHASE ENERGY
Isolation Barrier
®
2000. The software uses USB to
PIC18F2520
USB
DS51643B-page 55
Personal
Computer