1、C#通过OPC连接PLC读写功能案例C#通过OPC连接PLC读写功能案例C#通过OPC连接PLC读写功能案例最简单、最有效的PLC连接程序,里面包含了各种类型的读写功能,绝对是拷贝过去,直接把地址替换就可以使用。功能简介:本程序主要是针对PLC发送请求信号,收到信号执行调用,例如:由PLC发送请求信号1,程序自动去调用,当调用结束,信号恢复为0,直到下一次变为1,再次进行调用;1、手工下载一个Interop.OPCAutomation.dll2、手工创建一个类PublicOPC_PLC3、直接调用即可,调用方法:PublicOPC_PLC Plc = new PublicOPC_PLC();
2、Plc.InitConnect(); Plc.CH160CreateGroup(PLC地址); /此处的PLC地址必须为PLC中DB块对应的BOOL型的地址例如:C1.S7.DB35.DBX544.0using System;using System.Collections.Generic;using System.Linq;using System.Text;using OPCAutomation;using System.Net;using System.Threading;namespace OPCService public class PublicOPC_PLC #region 私有
3、变量 / / OPCServer Object GetLocalServer(); ConnectRemoteServer();/连接OPC服务器 MyGroups = MyServer.OPCGroups; /枚举本地OPC服务器 public void GetLocalServer() /获取本地计算机IP,计算机名称 strHostName = Dns.GetHostName(); /或者通过局域网内计算机名称 /获取本地计算机IP,计算机名称 IPHostEntry IPHost = Dns.Resolve(Environment.MachineName); if (IPHost.Ad
4、dressList.Length 0) IPHostEntry ipHostEntry = Dns.GetHostByAddress(IPHost.AddressList0.ToString(); strHostName = ipHostEntry.HostName.ToString(); /获取本地计算机上的OPCServerName try MyServer = new OPCServer(); object serverList = MyServer.GetOPCServers(strHostName); foreach (string server in (Array)serverLi
5、st) /cmbServerName.Items.Add(turn); Console.WriteLine(本地OPC服务器:0, server); catch (Exception err) Console.WriteLine(枚举本地OPC服务器出错:0, err.Message); /连接OPC服务器 / OPCServerIP / OPCServer名称 public bool ConnectRemoteServer() try string remoteServerIP = , remoteServerName = KEPware.KEPServerEx.V4; MyServer.C
6、onnect(remoteServerName, remoteServerIP);/连接本地服务器:服务器名+主机名或IP if (MyServer.ServerState = (int)OPCServerState.OPCRunning) /MessageBox.Show(已连接到:0, MyServer.ServerName); /WriteLog_Station(网络连接成功); else /这里你可以根据返回的状态来自定义显示信息,请查看自动化接口API文档 /MessageBox.Show(状态:0, MyServer.ServerState.ToString(); /WriteLo
7、g_Station(网络连接失败); MyServer.ServerShutDown += ServerShutDown;/服务器断开事件 catch (Exception err) /MessageBox.Show(连接远程服务器出现错误:0 + err.Message); return false; return true; public void ServerShutDown(string Reason)/服务器先行断开 /WriteLog_Station(服务器已经先行断开!); MyServer.Disconnect(); public void RemoveGroup(string
8、 Name) MyServer.OPCGroups.Remove(Name); void GroupAsyncWriteComplete(int TransactionID, int NumItems, ref Array ClientHandles, ref Array Errors) Console.WriteLine(%AsyncWriteComplete%); /*for (int i = 1; i = 1; i+) Console.WriteLine(Tran:0 ClientHandles:1 Error:2, TransactionID.ToString(), ClientHan
9、dles.GetValue(i).ToString(), Errors.GetValue(i).ToString(); */ void GroupAsyncReadComplete(int TransactionID, int NumItems, ref System.Array ClientHandles, ref System.Array ItemValues, ref System.Array Qualities, ref System.Array TimeStamps, ref System.Array Errors) Console.WriteLine(*GroupAsyncRead
10、Complete*); for (int i = 1; i = 1; i+) /Console.WriteLine(Tran:0 ClientHandles:1 Error:2, TransactionID.ToString(), ClientHandles.GetValue(i).ToString(), Errors.GetValue(i).ToString(); Console.WriteLine(Vaule:0, Convert.ToString(ItemValues.GetValue(i); #region 读取功能 public void AddGroupItems(string A
11、ddress)/添加组 MyItemMA = new OPCItem1; int i = 0;/i用于标记Item中的索引 /itmHandleServer; MyItemsMA = MyGroupMA.OPCItems; /MyItems2 = MyGroup2.OPCItems; MyItemMA0 = MyItemsMA.AddItem(Address, i); / / 读取byte转ASCII值 / public string ReadData(string Add) string result = ; try /初始化item数组 /GetLocalServer(); AddGrou
12、pItems(Add); Thread.Sleep(200);/暂停线程以让DataChange反映,否则下面的同步读可能读不到 /以下同步读 object ItemValues; object Qualities; object TimeStamps;/同步读的临时变量:值、质量、时间戳 MyItemMA0.Read(1, out ItemValues, out Qualities, out TimeStamps);/同步读,第一个参数只能为1或2 /int q0 = Convert.ToInt32(ItemValues);/转换后获取item值 Byte bytTemp = ItemVal
13、ues as Byte; /将byte数组转为字符串+ result = System.Text.ASCIIEncoding.ASCII.GetString(bytTemp);/OK /MessageBox.Show(result, 结果); return result; catch (Exception ex) /异常处理 return result; finally / / 读取boolean值,需要先创建group / / / public Boolean ReadData_Boolean(string Add) Boolean result = false; try /初始化item数
14、组 /GetLocalServer(); AddGroupItems(Add); Thread.Sleep(200);/暂停线程以让DataChange反映,否则下面的同步读可能读不到 /以下同步读 object ItemValues; object Qualities; object TimeStamps;/同步读的临时变量:值、质量、时间戳 MyItemMA0.Read(1, out ItemValues, out Qualities, out TimeStamps);/同步读,第一个参数只能为1或2 /int q0 = Convert.ToInt32(ItemValues);/转换后获取
15、item值 Boolean result1 = (Boolean)ItemValues; result = result1; return result; catch (Exception ex) /异常处理 return result; finally / / 读取Object值,需要先创建group / / / public object ReadData_Object(string Add) try CreateGroup(Add); catch (Exception ex) object result = null; try AddGroupItems(Add); Thread.Sle
16、ep(200);/暂停线程以让DataChange反映,否则下面的同步读可能读不到 /以下同步读 object ItemValues; object Qualities; object TimeStamps;/同步读的临时变量:值、质量、时间戳 MyItemMA0.Read(1, out ItemValues, out Qualities, out TimeStamps);/同步读,第一个参数只能为1或2 /int q0 = Convert.ToInt32(ItemValues);/转换后获取item值 result = ItemValues; if (result != null) if (
17、result.ToString() = ) return ; else result = result.ToString().Replace(0, ); result = result.ToString().Replace(n, ); result = result.ToString().Replace(r, ); result = result.ToString().Replace(t, ); return result; catch (Exception ex) /异常处理 result = ; return result; finally /RemoveGroup(Add); publi
18、c bool CreateGroup(string Address) try MyGroupMA = MyServer.OPCGroups.Add(Address);/添加组 /以下设置组属性 MyServer.OPCGroups.DefaultGroupIsActive = true;/激活组。 MyServer.OPCGroups.DefaultGroupDeadband = 0;/ 死区值,设为0时,服务器端该组内任何数据变化都通知组。 MyServer.OPCGroups.DefaultGroupUpdateRate = 200;/默认组群的刷新频率为200ms MyGroupMA.U
19、pdateRate = 100;/刷新频率为1秒。 MyGroupMA.IsSubscribed = true;/使用订阅功能,即可以异步,默认false /MyGroupMA.DataChange += new DIOPCGroupEvent_DataChangeEventHandler(GroupDataChange_Heart); MyGroupMA.AsyncWriteComplete += new DIOPCGroupEvent_AsyncWriteCompleteEventHandler(GroupAsyncWriteComplete); MyGroupMA.AsyncReadCo
20、mplete += new DIOPCGroupEvent_AsyncReadCompleteEventHandler(GroupAsyncReadComplete); catch (Exception err) /this.WriteLog_Station(过点创建组出现错误: + err.Message); return false; return true; #endregion #region 写入功能 / / 写入方法ascII / / public void WriteFa(string Value) int temp; temp = new int 0, MyItemMA0.Se
21、rverHandle ;/机型 string typecode = Value; byte arrValue = System.Text.Encoding.Default.GetBytes(typecode);/将string转为 byte Array serverHandles = (Array)temp; object valueTemp = new object2 , arrValue ;/item数量为2 Array values = (Array)valueTemp; Array Errors; int cancelID; MyGroupMA.AsyncWrite(1, ref se
22、rverHandles, ref values, out Errors, 1, out cancelID);/第一参数为item数量 / / 写入object / / public void WritecharFa(string Value) int temp = new int 0, MyItemMA0.ServerHandle ;/写入数据Item数量2 Array serverHandles = (Array)temp; object valueTemp = new object2 , Value ;/item数量为2 Array values = (Array)valueTemp; A
23、rray Errors; int cancelID; MyGroupMA.AsyncWrite(1, ref serverHandles, ref values, out Errors, 1, out cancelID);/第一参数为item数量 private void WriteByteFa(byte Value) int temp = new int 0, MyItemMA0.ServerHandle ;/写入数据Item数量2 Array serverHandles = (Array)temp; object valueTemp = new object2 , Value ;/item
24、数量为2 Array values = (Array)valueTemp; Array Errors; int cancelID; MyGroupMA.AsyncWrite(1, ref serverHandles, ref values, out Errors, 1, out cancelID);/第一参数为item数量 #endregion #region CH160 / / 创建组 / / / / OPCGroups MyGroupsStationCH160; / / OPCGroup Object / OPCGroup MyGroupStationCH160; / / OPCItems
25、 Object / OPCItems MyItemsStationCH160; / / OPCItem Object / OPCItem MyItemStationCH160; public OPCGroup GroupStationCH160 get return MyGroupStationCH160; public bool CH160CreateGroup(string Address) try MyGroupStationCH160 = MyServer.OPCGroups.Add(Address);/添加组 /以下设置组属性 MyServer.OPCGroups.DefaultGr
26、oupIsActive = true;/激活组。 MyServer.OPCGroups.DefaultGroupDeadband = 0;/ 死区值,设为0时,服务器端该组内任何数据变化都通知组。 MyServer.OPCGroups.DefaultGroupUpdateRate = 200;/默认组群的刷新频率为200ms MyGroupStationCH160.UpdateRate = 100;/刷新频率为1秒。 MyGroupStationCH160.IsSubscribed = true;/使用订阅功能,即可以异步,默认false MyGroupStationCH160.DataCha
27、nge += new DIOPCGroupEvent_DataChangeEventHandler(GroupDataChange_CH160Heart); MyGroupStationCH160.AsyncWriteComplete += new DIOPCGroupEvent_AsyncWriteCompleteEventHandler(GroupAsyncWriteComplete); MyGroupStationCH160.AsyncReadComplete += new DIOPCGroupEvent_AsyncReadCompleteEventHandler(GroupAsyncReadComplet
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