上位机恒压供水控制系统，通过MODBUS网络来控制台达PLC-up computer control PLC delta, this software is vell good control software,

PLC MODBUS TCP 通信，能和西门子施耐德PLC通信(PLC MODBUS TCP Communications, and SIEMENS, Schneider, PLC Communications)

主要是MODBUS TCP与PLC之间的通讯协议(the communication between modbus tcp and plc)

这个组件的访问测试项目，您可以进行初步的访问的测试，免去了您写测试程序的麻烦，这个项目是和三菱，西门子PLC的访问写在一起的。(This component's access test project, you can carry out preliminary access test, free you from the trouble of writing test program, this project is written together with Mitsubishi, Siem