Modenbus通讯程序集，已完成与多种Modenbus规约的设备通讯，具体请看代码注释 此程序用Tornado2.0编译，用于研华HE-8XX系列主板，程序在工程中运行3年以上无故障，解压密码为我的用户名：luckycy-Modenbus communication procedures set has been completed and various Modenbus Statute of the communication

RS485的保护电路，一些电路图，供大家参考-RS485 circuit protection, a number of circuit diagrams for your consideration