此源程序名为tyscq.c，MCU采用PIC16F877A，LCD采用1604，显示4行，第一行显示f=XX.XHz,第二行显示n=XXXXr/min,第三行显示：I=XXX.XA,第四行显示电流百分比。带有量程可设定功能，控制有二线制和三线制，可与高、中、低压变频器接口使用，亦可控制电动阀。-The source called tyscq.c, MCU using PIC16F877A, LCD with 1604, shows four rows, the first line shows the f = XX.XHz, the second line shows the n = XXXXr/min, the third line shows: I = XXX.XA , the fourth line shows the current percentage. With a range of functions can be set to control a two-wire and three wire system, with high, medium and low voltage inverter interface uses, can also control the electric valve.