1    /// <summary>
 2          /// 创建 ModBus RTU 连接
 3          /// </summary>
 4          /// <param name="portName">端口号</param>
 5          /// <param name="baudRate">波特率</param>
 6          /// <param name="parity">奇偶校验位</param>
 7          /// <param name="dataBits">数据位</param>
 8          /// <param name="stopBits">停止位</param>
 9          /// <returns></returns>
10          public  IModbusSerialMaster CreateModBusRtuConnection(string portName,int baudRate,Parity parity,int dataBits,StopBits stopBits)
11          {
12               return CreateModBusRtuConnect(new SerialPort(portName, baudRate, parity, dataBits, stopBits));
13          }
14 
15          public  IModbusSerialMaster CreateModBusRtuConnection(SerialPort serialPort)
16          {
17             IModbusSerialMaster master = null;
18             if (!serialPort.IsOpen)
19             {
20                 try
21                 {
22                     serialPort.Open();
23                 }
24                 catch (Exception e)
25                 {
26                     throw e;
27                 }
28             }
29             try
30             {
31               master = ModbusSerialMaster.CreateRtu(serialPort);
32               ///同时也可以配置master的一些参数
33               master.Transport.ReadTimeout = 100;//读取数据超时100ms
34               master.Transport.WriteTimeout = 100;//写入数据超时100ms
35               master.Transport.Retries = 3;//重试次数
36               master.Transport.WaitToRetryMilliseconds = 10;//重试间隔
37 
38             }
39             catch(Exception e)
40             {                 throw e;
41             }
42             return master;
43         }
44     }