// Connect to PLC
private void textToolStripMenuItem_Click(object sender, EventArgs e)
{
if (mythread != null)
{
if (run)
{
run = false;
}
if (mythread.IsAlive)
{
Thread.Sleep(100);
}
}
if (!run)
{
mythread = new Thread(new ThreadStart(ThreadWork));
pingthread = new Thread(new ThreadStart(PingThread));
if (_plc.Connect())
{
run = true;
textToolStripMenuItem.Enabled = false;
uložitToolStripMenuItem.Enabled = false;
PrepareChart();
mythread.Start();
pingthread.Start();
}
else
{
MessageBox.Show("Unable to connect to PLC", "PLC connection error");
}
}
}
private void ConnectDisconectAction(object obj)
{
if (plc.ConnectionStatus == ConnectionStatusEnum.CONNECTING ||
plc.ConnectionStatus == ConnectionStatusEnum.CONNECTED ||
plc.ConnectionStatus == ConnectionStatusEnum.RECONNECTING)
{
plc.Disconnect();
connectCancellationTokenSource.Cancel();
}
else
{
if (plc.ConnectionStatus != ConnectionStatusEnum.CONNECTING &&
plc.ConnectionStatus != ConnectionStatusEnum.DISCONNECTING &&
plc.ConnectionStatus != ConnectionStatusEnum.RECONNECTING)
{
connectCancellationTokenSource = new CancellationTokenSource();
Task.Run(new Action(() =>
{
plc.Connect(ip, port);
}), connectCancellationTokenSource.Token);
}
}
}
private Boolean Test()
{
Boolean res = false;
Ping pinger = null;
try
{
if (!string.IsNullOrEmpty(txt_ip.Text))
{
pinger = new Ping();
PingReply reply = pinger.Send(txt_ip.Text, 3000);
if (reply.Status == IPStatus.Success)
{
string msg = "PLC is reachable";
S7Type type = S7Type.S7300;
switch (combo_typ.SelectedValue)
{
case "s7-300":
type = S7Type.S7300;
break;
case "s7-400":
type = S7Type.S7400;
break;
case "s7-1200":
type = S7Type.S71200;
break;
case "s7-1500":
type = S7Type.S71500;
break;
}
Plc plc = null;
try
{
plc = new Plc(txt_ip.Text, type);
plc.Connect();
if (plc.Connected)
{
msg += "\r\nPLC connection is ok";
res = true;
}
else
{
msg += "\r\nUnable to connect to PLC";
MessageBox.Show(msg, "PLC connection error", MessageBoxButtons.OK, MessageBoxIcon.Error);
res = false;
}
}
catch (Exception ex0)
{
msg += "\r\nPLC connection exception\r\n " + ex0.Message;
MessageBox.Show(msg, "PLC connection error", MessageBoxButtons.OK, MessageBoxIcon.Error);
res = false;
}
finally
{
plc.Disconnect();
plc = null;
}
}
else
{
MessageBox.Show("PLC unreachable", "PLC connection error", MessageBoxButtons.OK, MessageBoxIcon.Error);
res = false;
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "PLC connection exception", MessageBoxButtons.OK, MessageBoxIcon.Error);
res = false;
}
finally
{
if (pinger != null)
{
pinger.Dispose();
}
}
return(res);
}
