C# 机器视觉工控通讯------西门子PLC之S7协议上位机通讯_c#s7协议

C# 机器视觉工控通讯------西门子PLC之S7协议上位机通讯

使用步骤

1.引入库

项目添加应用HslCommunication.dll和代码代码如下（示例）：
dll官方支持网站>

using HslCommunication.Profinet.Siemens;
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## 2.定义全局变量，选择PLC类型，设置正确的IP地址

代码如下：

` public static string PlcIpAddress = "192.168.101.50";
  public static SiemensPLCS siemensPLCS = SiemensPLCS.S1200;
  public static SiemensS7Net siemensTcpNet = null;

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3.链接PLC

代码如下：

      public static bool InitialPLC()
        {
            int k = 0;


        tryAgain:
            try
            {
                System.Net.IPAddress address;
                if (!System.Net.IPAddress.TryParse(PublicVariables.PlcIpAddress, out address))
                {
                    MessageBox.Show("Ip地址输入不正确！");
                    return false;
                }
                //SiemensPLCS siemensPLCS = SiemensPLCS.S1200;

                PublicVariables.siemensTcpNet = new SiemensS7Net(PublicVariables.siemensPLCS);

                PublicVariables.siemensTcpNet.IpAddress = PublicVariables.PlcIpAddress;



                OperateResult connect = PublicVariables.siemensTcpNet.ConnectServer();
                if (!connect.IsSuccess)
                {
                    return false;

                }

                return true;

            }
            catch (Exception ex)
            {
                k++;
                if (k < 4)
                {
                    Thread.Sleep(50);
                    goto tryAgain;
                }
                else
                {
                    return false;
                }
            }
        }
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-## 4.数据DB块写入–

        /// <summary>
        /// 统一的数据写入的结果显示
        /// </summary>
        /// <param name="result"></param>
        /// <param name="address"></param>
        public static void writeResultRender(OperateResult result, string address)
        {
            //Thread.Sleep(200);
            if (result.IsSuccess)
            {
                //MessageBox.Show(DateTime.Now.ToString("[HH:mm:ss] ") + $"[{address}] 写入成功");
            }
            else
            {
                MessageBox.Show(DateTime.Now.ToString("[HH:mm:ss] ") + $"[{address}] 写入失败{Environment.NewLine}原因：{result.ToMessageShowString()}");
            }
        }
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##4.1 写入实列如下：

writeResultRender(PublicVariables.siemensTcpNet.Write("DB80.4.6", bool.Parse("true")), "DB80.4.6")
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##5 bool类型读取

        public OperateResult<bool> ReadBool(string address)
        {
            return GetBoolResultFromBytes(ReadBitFromPLC(address));
        }
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##6 寄存器批量读取

        public override OperateResult<byte[]> Read(string address, ushort length)
        {
            OperateResult<byte, int, ushort> operateResult = AnalysisAddress(address);
            if (!operateResult.IsSuccess)
            {
                return OperateResult.CreateFailedResult<byte[]>(operateResult);
            }

            List<byte> list = new List<byte>();
            ushort num = 0;
            while (num < length)
            {
                ushort num2 = (ushort)Math.Min(length - num, 200);
                OperateResult<byte[]> operateResult2 = Read(new OperateResult<byte, int, ushort>[1] { operateResult }, new ushort[1] { num2 });
                if (!operateResult2.IsSuccess)
                {
                    return operateResult2;
                }

                list.AddRange(operateResult2.Content);
                num = (ushort)(num + num2);
                operateResult.Content2 += num2 * 8;
            }

            return OperateResult.CreateSuccessResult(list.ToArray());
        }
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总结

以上就是今天要讲的内容，本文仅仅简单介绍了西门子工控机和西门子PLC使用S7协议通讯，而HslCommunication提供了大量工控通讯的方法。