ATSCADA Advanced Programming Tag Events

In advanced programming, we usually use tag events to do some duties, we have two Tag events:
1. The event occurs when the tag value changed
2. The event occurs when the tag connection status changed

Example about tag events using c# language.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication17

public partial class Form1 : Form

public Form1()



private void Form1_Load(object sender, EventArgs e)

// Event occur when the Tag value changed
iDriver1.Task(“AT-TMSDevice”).Tag(“HighLevel”).TagValueChanged += Form1_TagValueChanged;

// Event occur when the connection status (good or bad) of Tag changed
iDriver1.Task(“AT-TMSDevice”).Tag(“HighLevel”).TagStatusChanged += Form1_TagStatusChanged;


void Form1_TagValueChanged(object o, ATSCADA.TagValueEventArgs e)

// Show the Tag value when the Tag value changed


void Form1_TagStatusChanged(object o, ATSCADA.TagStatusEventArgs e)

// Show the connection status (good or bad) of Tag
MessageBox.Show( iDriver1.Task(“AT-TMSDevice”).Tag(“HighLevel”).Status);




>> ReferenceEnglish – Traning Cources


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