File list (Check if you may need any files):
PLC_DEMO
........\ASM51.PRJ
........\demo_2008.cxp
........\demo_2008.opt
........\DEMO_PID
........\DEMO_PID.BIN
........\DEMO_PID.C
........\DEMO_PID.DSK
........\DEMO_PID.HEX
........\DEMO_PID.LST
........\DEMO_PID.M51
........\DEMO_PID.OBJ
........\demo_pid.PRJ
........\errormsg.lst
........\first-mnf.cxp
........\first-mnf.opt
........\for.cxp
........\for.opt
........\jjj.sp2
........\jjj.V3F
........\jjj_log.dat
........\jjj_psw.dat
........\PLC_DEMO.cxp
........\PLC_DEMO.opt
........\PLC_DEMO_1S中断数据采集.opt
........\PLC_DEMO_1S中断脉冲采集.cxp
........\PLC_DEMO_1S中断脉冲采集.opt
........\PLC_DEMO_DA.opt
........\PLC_DEMO_DA_AD.cxp
........\PLC_DEMO_DA_AD.opt
........\PLC_DEMO_FUNC.cxp
........\PLC_DEMO_FUNC.opt
........\PLC_DEMO_rxd.cxp
........\PLC_DEMO_rxd.opt
........\PLC_DEMO_子中断.cxp
........\PLC_DEMO_子中断.opt
........\TEMP.LST
........\WAVE.LIN