基于PLC的PID上位机控制，可以控制三菱的PLC，有曲线显示，可以实现数据保存和再显示-PLC-based PC PID control, the control of Mitsubishi PLC, a curve, Data can be preserved and shows again and again

OPC 通讯程序 我当时用于SIEMENS PLC 通讯,上位机安装了OPC SEVER(OPC communications program I was used to SIEMENS PLC communications, PC installed OPC SEVER)