一个完整的RTU程序源码,用DOS平台,支持16串口,在天津港用的很多,8个规约103,modbus,cdt,1801,u4f-a complete source RTU procedures, and DOS platforms, support 16 serial, in the Tianjin Port many, 8 Statute 103, modbus connection, cdt, 1801, u4f

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串口103规约，电力系统自动化，监控通讯-Serial 103 of the Statute, the power system automation, monitoring communications

标准103,104规约测试工具,简单实用(104 Protocol Testing Tool)