private void ReadOpcUa()
{
string value = null;
try
{
if (OpcUa.IsConnected)
{
var result = OpcUa.PLC_ReadValues(txt_node.Text.Trim());
lbl_result.Text = "结果：" + value;
return;
}
lbl_result.Text = "结果：连接断开";
}
catch (Exception ex)
{
lbl_result.Text = "结果：读取异常！原因：" + ex.Message;
}
}
private void PC_PLC_SignalExchange_Siemens(CancellationToken token, bool v)
{
DateTime x = DateTime.Now;
while (!token.IsCancellationRequested)
{
#region 判断plc是否断线
if (!IsConnectPLC)
{
UpdateShowMessage("正在连接PLC……");
Task task1 = Task.Run(() =>
{
ConnectPLCSiemens();
});
task1.Wait();
Thread.Sleep(3000);
continue;
}
#endregion
Thread.Sleep(1);
#region 发送握手信号
if (IsHandshake)
{
if (IsStart)
{
IsOne = !IsOne;
PLCPulse = IsOne ? 1 : 2;
IsHandshake = false;
bool back = false;
try
{
back = PLCSiemens.PLC_WriteValues(PLCPulse.ToString(), null);
}
catch (Exception ex)
{
IsConnectPLC = false;
UpdateShowMessage("握手信号异常，与PLC断开连接！");
}
if (!back)
{
IsConnectPLC = false;
PLCPulse = 0;
}
}
else
{
PLCPulse = 0;
}
}
#endregion
#region 与PLC 交互
if (v)
{
try
{
#region 读取plc数据
var isRead = PLCSiemens.PLC_ReadValues("");
ReadTRG = ("1" == isRead) ? 1 : 0;
if (1 != ReadTRG)
{
OldReadTRG = 0;
}
else
{
if (0 < ReadTRG - OldReadTRG)
{
//读取数据
ReadDataFromPLC();
}
OldReadTRG = 1;
}
#endregion
}
catch (Exception ex)
{
UpdateShowMessage(string.Format("与plc交互异常：{0}！", ex.Message));
LogHelper.Fatal(string.Format("与plc交互异常：{0}！", ex.Message));
}
}
#endregion
}
}
