这是一个大型设备的西门子S7200 PLC控制和采集程序。内部有计算时间的部分，设备根据液位的控制逻辑等，很有价值，值得初学者参考。-This is a large equipment SIEMENS PLC S7200 control and collection procedures. Internal calculation time, equipment, according to the level of control logic, and so on, very valuable,