这是一个比较好的Proteus虚拟仿真的串口例子，值得初学者一看，在这要特别感谢ednchina的bawgijfd以及一起为技术奋斗同人们无私的奉献-This is a relatively good Proteus serial virtual simulation examples, it is worth a look for beginners, in this special thanks to the ednchina for technical bawgijfd and strug

通信demo。作为客户端，调用TCP端口，连接远程modbus从站，发送16报文。(communication demo. As client , open TcpIp port, connect modbus slave, send fun=16 code.)