private void KeepAlivePLC()
{
while (true)
{
int x = -1; short arrayval = 0;
taskint = Task.Factory.StartNew <int>(new Func <int>(() => { return(mxComponentCla.Read("M8000", out arrayval)); }));
bool bol = taskint.Wait(new TimeSpan(0, 0, 0, 3));
if (!bol)
{
connectionStatus = false;
this.Invoke(new Action(() => { label3.Text = "未连接"; label3.ForeColor = System.Drawing.Color.Red; }));
if (startStopProduct)
{
startStopProduct = false;
this.Invoke(new Action(() => { btn_conn.Enabled = true; }));
MessageBox.Show("PLC请求超时，请检查PLC连接状态，重启客户端", " 武汉镭立科技友情提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
else
{
x = taskint.Result;
if (x != 0)
{
connectionStatus = false;
this.Invoke(new Action(() => { label3.Text = "未连接"; label3.ForeColor = System.Drawing.Color.Red; }));
if (startStopProduct)
{
startStopProduct = false;
this.Invoke(new Action(() => { btn_conn.Enabled = true; }));
MessageBox.Show("PLC连接已断开，请检查PLC连接状态，重启客户端", " 武汉镭立科技友情提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
if (!connectionStatus)
{
if (mxComponentCla != null)
{
mxComponentCla.MxClose();
mxComponentCla = null;
}
mxComponentCla = new MxComponentCla(axActUtlType1, "9");
int m = mxComponentCla.MxOpen();
if (m == 0 && mxComponentCla.PlcSatte() == 1)
{
connectionStatus = true;
this.Invoke(new Action(() => { label3.Text = "已连接"; label3.ForeColor = System.Drawing.Color.Green; }));
}
else
{
connectionStatus = false;
this.Invoke(new Action(() => { label3.Text = "未连接"; label3.ForeColor = System.Drawing.Color.Red; }));
}
}
Thread.Sleep(2000);
}
}
private void MxComponentConnFrm_Load(object sender, EventArgs e)
{
mxComponentCla = new MxComponentCla(axActUtlType1, "9");
mxComponentCla.MxOpen();
if (mxComponentCla.PlcSatte() == 1)
{
connectionStatus = true;
label3.Text = "已连接";
label3.ForeColor = System.Drawing.Color.Green;
}
else
{
connectionStatus = false;
label3.Text = "未连接";
label3.ForeColor = System.Drawing.Color.Red;
}
Task task = Task.Factory.StartNew(() =>
{
KeepAlivePLC();
});
}
/// <summary>
/// 连接
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
if (button1.Text == "连接")
{
if (mxComponentCla == null)
{
mxComponentCla = new MxComponentCla(axActUtlType1, txtConNode.Text.Trim());
mxComponentCla.MxOpen();
DeviceStateTextEdit(label3, mxComponentCla.PlcSatte());
KeepAliveTime.Start();
}
}
else
{
if (mxComponentCla != null)
{
mxComponentCla.MxClose();
mxComponentCla = null;
DeviceStateTextEdit(label3, 0);
KeepAliveTime.Stop();
}
}
}
