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;
## 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;
3.链接PLC
代码如下：
public static bool InitialPLC(){int k = 0;tryAgain:try{.IPAddress address;if (!.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;}}}
-## 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()}");}}
##4.1 写入实列如下：
writeResultRender(PublicVariables.siemensTcpNet.Write("DB80.4.6", bool.Parse("true")), "DB80.4.6")
##5 bool类型读取
public OperateResult<bool> ReadBool(string address){return GetBoolResultFromBytes(ReadBitFromPLC(address));}
##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());}
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。
