520 lines
14 KiB
C#
520 lines
14 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using OpcRcw.Da;
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using OpcRcw.Comn;
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using System.Runtime.InteropServices;
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namespace Common
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{
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public class PlcRead
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{
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/// <summary>
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/// 进行写的数据
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/// </summary>
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public object writeDataValue;
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/// <summary>
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/// 进行读的数据
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/// </summary>
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public object readDataValue;
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/// <summary>
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/// 生成的server对象，主要用于异步时调用
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/// </summary>
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public IOPCServer ObjectServerPlc
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{
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get { return ServerObj; }
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}
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/// <summary>
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/// 进行写的数据
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/// </summary>
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public object WriteDataValue
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{
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get { return writeDataValue; }
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set { writeDataValue = value; }
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}
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/// <summary>
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/// 进行读的数据
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/// </summary>
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public object ReadDataValue
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{
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get { return readDataValue; }
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set { readDataValue = value; }
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}
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private bool boolValueChang = true;
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/// <summary>
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/// 该属性用于是否检测plc数据改成，异步订阅
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/// </summary>
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public bool ValueChang
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{
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set { boolValueChang = value; }
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}
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#region 参数值
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/// <summary>
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/// 设置db模块的值
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/// </summary>
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public string itemDvalue = "0";
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/// <summary>
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/// 异步读写对象
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/// </summary>
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public IOPCAsyncIO2 IOPCAsyncIO2Obj = null;
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/// <summary>
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/// 组管理对象
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/// </summary>
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public IOPCGroupStateMgt IOPCGroupStateMgtObj = null;
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/// <summary>
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/// 表示item的id
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/// </summary>
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public int hClient = 1;
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public const int LOCALE_ID = 0x407;
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/// <summary>
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/// OPCServer
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/// </summary>
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public IOPCServer ServerObj;//OPCServer
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public int pSvrGroupHandle = 0;
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/// <summary>
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/// 返回增加的group
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/// </summary>
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public Object MyobjGroup1 = null;
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/// <summary>
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/// plc是否读写
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/// </summary>
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public bool Write = true;
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/// <summary>
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/// 此处应该是返回连接的cookie值
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/// </summary>
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public Int32 dwCookie = 0;
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public IConnectionPointContainer pIConnectionPointContainer = null;
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public IConnectionPoint pIConnectionPoint = null;
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/// <summary>
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/// item的数组句柄
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/// </summary>
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public int[] ItemServerHandle;
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/// <summary>
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/// item的值。
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/// </summary>
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public OpcRcw.Da.OPCITEMDEF[] ItemArray;
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#endregion
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/// <summary>
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/// 连接服务器的名字
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/// </summary>
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public string remoteServerName = "OPC.SimaticNet";
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/// <summary>
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/// 连接服务器的名字
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/// </summary>
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public string ServerName
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{
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set { remoteServerName = value; }
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}
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public string remoteServerIP = "localhost";
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/// <summary>
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/// 连接服务器的ip地址
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/// </summary>
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public string ServerIP
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{
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set { remoteServerIP = value; }
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}
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/// <summary>
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/// 错误内容
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/// </summary>
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protected string errText = string.Empty;
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/// <summary>
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/// 错误内容
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/// </summary>
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public string ErrText
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{
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get { return errText; }
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set { errText = value; }
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}
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/// <summary>
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/// 该属性用于传触发 plc的form窗体（）
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/// </summary>
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public object formthis;
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#region plc的链接
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/// <summary>
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/// plc的链接
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/// </summary>
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/// <param name="remoteServerName">链接的名字（）</param>
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/// <param name="remoteServerIP">链接的ip地址</param>
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/// <returns></returns>
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public string ConnectRemoteServer()
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{
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try
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{
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////建议一个连接
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Type svrComponenttyp = Type.GetTypeFromProgID(remoteServerName, remoteServerIP);
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ServerObj = (IOPCServer)Activator.CreateInstance(svrComponenttyp);
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}
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catch (Exception ex)
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{
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errText = "连接远程服务器出现错误:" + ex.Message.ToString();
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}
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return errText;
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}
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#endregion
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public int hClientGroup =1;
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#region 增加一个group
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/// <summary>
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/// 增加一个group
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/// </summary>
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/// <param name="Form_Main"></param>
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/// <returns></returns>
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public string PLCGroupAdd(object Form_Main)
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{
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string errText = string.Empty;
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Int32 dwRequestedUpdateRate = 250;
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Int32 pRevUpdateRate;
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float deadband = 0;
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int TimeBias = 0;
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GCHandle hTimeBias, hDeadband;
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hTimeBias = GCHandle.Alloc(TimeBias, GCHandleType.Pinned);
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hDeadband = GCHandle.Alloc(deadband, GCHandleType.Pinned);
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Guid iidRequiredInterface = typeof(IOPCItemMgt).GUID;
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try
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{
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ServerObj.AddGroup("MyOPCGroup1",//组对象
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0,
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dwRequestedUpdateRate,
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hClientGroup,
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hTimeBias.AddrOfPinnedObject(),
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hDeadband.AddrOfPinnedObject(),
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LOCALE_ID,
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out pSvrGroupHandle,
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out pRevUpdateRate,
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ref iidRequiredInterface,
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out MyobjGroup1);
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IOPCAsyncIO2Obj = (IOPCAsyncIO2)MyobjGroup1;
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//Query interface for Async calls on group object
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IOPCGroupStateMgtObj = (IOPCGroupStateMgt)MyobjGroup1;
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pIConnectionPointContainer = (IConnectionPointContainer)MyobjGroup1;
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//定义特定组的异步调用连接
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Guid iid = typeof(IOPCDataCallback).GUID;
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// Establish Callback for all async operations
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pIConnectionPointContainer.FindConnectionPoint(ref iid, out
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pIConnectionPoint);
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// Creates a connection between the OPC servers's connection point and this client's sink (the callback object)
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pIConnectionPoint.Advise(Form_Main, out dwCookie);
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}
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catch (Exception ex)
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{
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errText = ex.Message.ToString();
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}
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return errText;
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}
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#endregion
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#region 添加一个读写的Items数组对象
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/// <summary>
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/// 添加一个读写的Items数组对象
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/// </summary>
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/// <param name="items">Items读写对象数组</param>
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/// <returns>Items是否执行成功</returns>
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public string PlcItemAdd(OPCITEMDEF[] items)
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{
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string errText = string.Empty;
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IntPtr pResults = IntPtr.Zero;
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IntPtr pErrors = IntPtr.Zero;
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try
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{
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((IOPCItemMgt)MyobjGroup1).AddItems(items.Length, items, out pResults, out pErrors);
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int[] errors = new int[items.Length];
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Marshal.Copy(pErrors, errors, 0, items.Length);
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ItemServerHandle = new int[items.Length];
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IntPtr pos = pResults;
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OPCITEMRESULT result;
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if (errors[0] == 0)
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{
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result = (OPCITEMRESULT)Marshal.PtrToStructure(pos, typeof(OPCITEMRESULT));
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ItemServerHandle[0] = result.hServer;
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}
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for (int i = 1; i < errors.Length; i++)
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{
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if (errors[i] == 0)
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{
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pos = new IntPtr(pos.ToInt32() + Marshal.SizeOf(typeof(OPCITEMRESULT)));
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result = (OPCITEMRESULT)Marshal.PtrToStructure(pos, typeof(OPCITEMRESULT));
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ItemServerHandle[i] = result.hServer;
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}
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}
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return errText;
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}
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catch (System.Exception ex) // catch for add item
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{
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return ex.Message.ToString().Trim();
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}
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finally
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{
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// Free the memory
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if (pResults != IntPtr.Zero)
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{
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Marshal.FreeCoTaskMem(pResults);
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pResults = IntPtr.Zero;
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}
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if (pErrors != IntPtr.Zero)
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{
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Marshal.FreeCoTaskMem(pErrors);
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pErrors = IntPtr.Zero;
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}
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}
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}
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#endregion
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#region 写plc的值
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/// <summary>
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/// 写plc的值
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/// </summary>
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/// <param name="values">写的值</param>
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/// <returns></returns>
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public string WirtePlc(object[] values)
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{
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string errText = string.Empty;
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int nCancelid;
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IntPtr pErrors = IntPtr.Zero;
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if (IOPCAsyncIO2Obj != null)
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{
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try
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{
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IOPCAsyncIO2Obj.Write(ItemServerHandle.Length, ItemServerHandle,
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values, ItemServerHandle.Length, out nCancelid, out pErrors);
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int[] errors = new int[ItemServerHandle.Length];
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Marshal.Copy(pErrors, errors, 0, ItemServerHandle.Length);
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if (errors[0] != 0)//Error in reading item
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{
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Marshal.FreeCoTaskMem(pErrors);
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pErrors = IntPtr.Zero;
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return errText;
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}
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return errText;
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}
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catch (Exception ex)
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{
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errText = ex.Message.ToString().Trim();
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return errText;
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}
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}
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return errText;
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}
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#endregion
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/// <summary>
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/// 读取plc的值
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/// </summary>
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/// <returns></returns>
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public string ReadPlc()
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{
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string errText = string.Empty;
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int nCancelid;
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IntPtr pErrors = IntPtr.Zero;
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if (IOPCAsyncIO2Obj != null)
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{
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try
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{
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IOPCAsyncIO2Obj.Read(ItemServerHandle.Length, ItemServerHandle,
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ItemServerHandle.Length, out nCancelid, out pErrors);
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int[] errors = new int[ItemServerHandle.Length];
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Marshal.Copy(pErrors, errors, 0, ItemServerHandle.Length);
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return errText;
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}
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catch (Exception ex)
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{
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errText = ex.Message.ToString().Trim();
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}
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}
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return errText;
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}
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#region 检测plc数据改变时，触发事件
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/// <summary>
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/// 检测plc数据改变时，触发事件
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/// </summary>
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/// <returns></returns>
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public string DataChange()
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{
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string errText = string.Empty;
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IntPtr pRequestedUpdateRate = IntPtr.Zero;
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int nRevUpdateRate = 0;
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IntPtr hClientGroup = IntPtr.Zero;
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IntPtr pTimeBias = IntPtr.Zero;
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IntPtr pDeadband = IntPtr.Zero;
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IntPtr pLCID = IntPtr.Zero;
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int nActive = 0;
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// activates or deactivates group according to checkbox status
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GCHandle hActive = GCHandle.Alloc(nActive, GCHandleType.Pinned);
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hActive.Target = 1;
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try
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{
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IOPCGroupStateMgtObj.SetState(pRequestedUpdateRate, out nRevUpdateRate,
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hActive.AddrOfPinnedObject(), pTimeBias, pDeadband, pLCID,
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hClientGroup);
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}
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catch (System.Exception error)
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{
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errText = error.Message.ToString();
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}
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finally
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{
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hActive.Free();
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}
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return errText;
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}
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#endregion
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#region 断开PLC的连接
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/// <summary>
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/// 断开PLC的连接
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/// </summary>
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/// <returns></returns>
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public string DisConnection()
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{
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string errText = string.Empty;
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try
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{
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if (dwCookie != 0)
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{
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pIConnectionPoint.Unadvise(dwCookie);
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dwCookie = 0;
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}
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// Free unmanaged code
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Marshal.ReleaseComObject(pIConnectionPoint);
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pIConnectionPoint = null;
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Marshal.ReleaseComObject(pIConnectionPointContainer);
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pIConnectionPointContainer = null;
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if (IOPCAsyncIO2Obj != null)
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{
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Marshal.ReleaseComObject(IOPCAsyncIO2Obj);
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IOPCAsyncIO2Obj = null;
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}
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ServerObj.RemoveGroup(pSvrGroupHandle, 0);
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if (IOPCGroupStateMgtObj != null)
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{
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Marshal.ReleaseComObject(IOPCGroupStateMgtObj);
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IOPCGroupStateMgtObj = null;
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}
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if (MyobjGroup1 != null)
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{
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Marshal.ReleaseComObject(MyobjGroup1);
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MyobjGroup1 = null;
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}
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if (ServerObj != null)
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{
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Marshal.ReleaseComObject(ServerObj);
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ServerObj = null;
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}
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}
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catch (System.Exception error)
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{
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errText = error.Message.ToString().Trim();
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}
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return errText;
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}
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#endregion
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}
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}
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