nmodbus4

程序调试中当程序运行到：

string ipAddress = “10.0.0.69”; //use TCP for example

int tcpPort = 502;

TcpClient tcpClient = new TcpClient();

ModbusIpMaster IpMaster = ModbusIpMaster.CreateIp(tcpClient);

IpMaster= ModbusIpMaster.CreateIp(tcpClient);

IpMaster.Transport.Retries = 0; //don't have to do retries

IpMaster.Transport.ReadTimeout = com1.Com_ReadTimeOut; 

此时会产生错误提示：不允许对非连接的套接字执行此操作。

产生原因：以太网链路有问题：ping不上对应的IP地址。