该资源包含了使用VC或者VB去控制PLC和道闸的起落，里面包含了道闸通讯的协议。如果需要做控制类的软件是个不错的参考.-The resource contains a VC or VB to control the PLC and the gate of the landing, which contains the communication protocol. If you need to do the software is a good control of the reference.