public bool Connect()
{
PlcClient = new S7Client();
TronTrace.TraceInformation("PlcConnection: Connect to " + PlcAddress);
PlcClient.ConnectTo(PlcAddress, PlcRack, PlcSlot);
if (PlcClient._LastError != 0)
{
var text = PlcResult.GetResultText(PlcClient._LastError);
TronTrace.TraceError("PlcConnection: Connect FAILED : " + text);
}
return(IsConnected);
}
public void StartPolling(List <PlcItem> items, int plcPollIntervalMilliseconds)
{
_pollItems = items;
PlcPollIntervalMilliseconds = plcPollIntervalMilliseconds;
if (PlcPollIntervalMilliseconds > 0)
{
TronTrace.TraceInformation($"PlcConnection: Start polling using {PlcPollIntervalMilliseconds}ms interval");
_pollTimer = new Timer(_ => PollPlc(), this,
TimeSpan.FromMilliseconds(PlcPollIntervalMilliseconds),
TimeSpan.FromMilliseconds(PlcPollIntervalMilliseconds));
}
}
private void DoPollPlc()
{
if (PlcClient.Connected != _oldPlcConnected)
{
TronTrace.TraceInformation("PlcConnection: Connected = " + PlcClient.Connected);
_oldPlcConnected = PlcClient.Connected;
}
foreach (var plcItem in _pollItems)
{
plcItem.UpdateValueFromPlc();
}
}
