ADvosol OPC .Net Lib, And OPC products
OPC Sample Code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using OPCAutomation;
namespace OPC
{
public partial class Form1 : Form
{
OPCServer ObjOPCServer;
OPCGroups ObjOPCGroups;
OPCGroup ObjOPCGroup;
string OPCServerName;
public Form1()
{
try
{
InitializeComponent();
OPCServerName = "{Here comes your OPC server’s name}";
ObjOPCServer = new OPCServer();
ObjOPCServer.Connect(OPCServerName, "");
ObjOPCGroups = ObjOPCServer.OPCGroups;
ObjOPCGroup = ObjOPCGroups.Add("OPCGroup1");
ObjOPCGroup.DataChange += new DIOPCGroupEvent_DataChangeEventHandler(ObjOPCGroup_DataChange);
ObjOPCGroup.OPCItems.AddItem("{tag name or address (like {plc name on server}!%mw0)}", 1);
ObjOPCGroup.UpdateRate = 10;
ObjOPCGroup.IsActive = true;
ObjOPCGroup.IsSubscribed = true;
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
}
private void button1_Click(object sender, EventArgs e)
{
}
private void ObjOPCGroup_DataChange(int TransactionID, int NumItems, ref Array ClientHandles, ref Array ItemValues, ref Array Qualities, ref Array TimeStamps)
{
for (int i = 1; i <= NumItems; i++)
{
if ((Convert.ToInt32(ClientHandles.GetValue(i)) == 1))
{
textBox1.Text = ItemValues.GetValue(i).ToString();
}
}
}
private void Form1_Load(object sender, EventArgs e)
{
OPCServerClass GlobalOPCServer = new OPCServerClass();
Array ServerList = (Array)GlobalOPCServer.GetOPCServers(""); for (int i = 1; i <= ServerList.Length; i++)
{ comboBox1.Items.Add(ServerList.GetValue(i).ToString()); }
}
}
from: GitHub.com
C# sample code that reads an item from an OPC server, Client Component, using OPCDA.NET, using OPCDA, using OPC;
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using System; using OPC; using OPCDA; using OPCDA.NET; namespace OpcDemo { public class Demo { string ServerAccess() { OpcServer Srv = new OpcServer() ; int rtc = Srv.Connect( "Advosol.SimDAServer.1" ); if( HRESULTS.Failed( rtc ) return Srv.GetErrorString( rtc ); SyncIOGroup srwGroup = new SyncIOGroup( Srv ) ; OPCItemState Rslt ; int rtc = srwGroup.Read( OPCDATASOURCE.OPC_DS_CACHE, "SimulatedData.Step", out Rslt ); string retVal; if( HRESULTS.Failed(rtc) ) retVal = "Read error" ; else retVal = "data="+ Rslt.DataValue.ToString(); srwGroup.Dispose(); Srv.Disconnect(); return retVal ; } } |
Using the OpcGroup Class
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using System; using System.Runtime.InteropServices; using OPC; using OPCDA; using OPCDA.NET; namespace VCSSampleClient { public class DemoOpc { public string ServerAccessOpc() { OpcServer Srv = new OpcServer() ; int rtc = Srv.Connect( "Advosol.SimDAServer.1" ); if( HRESULTS.Failed( rtc ) return Srv.GetErrorString( rtc ); OpcGroup oGrp ; float deadBand = 0.0F; try { oGrp = Srv.AddGroup( "Grp1", true, 500, ref deadBand, 0, 0 ); catch( Exception ex ) { Srv.Disconnect(); return ex.Message ; } OPCItemDef[] items = new OPCItemDef[1]; items[0] = new OPCItemDef( "SimulatedData.Step", true, 0, VarEnum.VT_BSTR ); OPCItemResult[] addRslt = new OPCItemResult[1]; int rtc = oGrp.AddItems( items, out addRslt ) ; if( HRESULTS.Failed(rtc) ) { Srv.Disconnect(); return "Error at AddItem" ; } int[] iHnd = new Int32[1]; iHnd[0] = addRslt[0].HandleServer ; OPCItemState[] rslt ; rtc = oGrp.Read( OPCDATASOURCE.OPC_DS_CACHE, iHnd, out rslt ); string retVal; if( HRESULTS.Failed(rtc) ) retVal = "Read error" ; else if( HRESULTS.Failed(rslt[0].Error) ) retVal = "Item Read error" ; else retVal = "data="+ rslt[0].DataValue.ToString(); oGrp.Remove(true); Srv.Disconnect(); return retVal ; } } } |
from : http://advosol.us/manuals/opcdanet/topic6.html
gfgrep-status: /etc/grep-dctrl.rc: write permissions for group or others, ignoring Error , Solved
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gfgrep-status: /etc/grep-dctrl.rc: write permissions for group or others, ignoring .grep-status: /etc/grep-dctrl.rc: write permissions for group or others, ignoring .grep-status: /etc/grep-dctrl.rc: write permissions for group or others, ignoring Command is here: chmod 444 /etc/grep-dctrl.rc: |
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