这是一个根据输入信号计算功率因数的电表程序，具有报警和RS485通讯功能；选用电能IC为CS5460A,MCU为PHILIPS的LPC932芯片。-This is a calculation based on the input signal power factor meter procedures, with alarm and RS485 communication function; Energy use for the IC CS5460A, MCU for the LPC932 PH