/// <summary>
/// States the fault.
/// </summary>
/// <param name="event">The event.</param>
private void State_Fault(State_Event @event)
{
switch (@event)
{
case State_Event.Enter:
delay = 0;
this.SetPlcData(string.Empty);
if (this.tcpClient != null)
{
this.tcpClient.Connected -= this.TcpClient_Connected;
this.tcpClient.Disconnected -= this.TcpClient_Disconnected;
this.tcpClient.DataAvailable -= this.TcpClient_DataAvailable;
}
this.tcpClient?.Disconnect();
this.tcpClient?.Dispose();
this.tcpClient = null;
this.UpdateStatus(GuiState.FAULT, Invariant($"{this.Name} is in fault."));
break;
case State_Event.Poll:
delay++;
if (delay > 10)
{
this.StateTrans(PlcState.State_GetPort, this.State_GetPort);
}
break;
default:
break;
}
}
/// <summary>
/// States the online.
/// </summary>
/// <param name="event">The event.</param>
private void State_Online(State_Event @event)
{
switch (@event)
{
case State_Event.Enter:
this.UpdateStatus(GuiState.ONLINE, "Connected to PLC");
this.plcInputEventData.MarkDirty();
this.plcOutputEventData.MarkDirty();
this.plcSystemEventData.MarkDirty();
this.SetSubscriptions();
break;
case State_Event.NewData:
this.ProcessInputData();
break;
case State_Event.Poll:
this.missedHeartbeats++;
if (this.missedHeartbeats > 10)
{
this.StateTrans(PlcState.State_Fault, this.State_Fault);
}
break;
case State_Event.Disconnect:
this.StateTrans(PlcState.State_Fault, this.State_Fault);
break;
default:
break;
}
}
/// <summary>
/// States the wait for port information.
/// </summary>
/// <param name="event">The event.</param>
private void State_WaitForPortInformation(State_Event @event)
{
switch (@event)
{
case State_Event.Enter:
delay = 0;
this.UpdateStatus(GuiState.FAULT, "Communications port for the plc is not configured. Please setup the Plc");
break;
case State_Event.Poll:
delay++;
if (delay > 5)
{
this.StateTrans(PlcState.State_GetPort, this.State_GetPort);
}
break;
default:
break;
}
}
/// <summary>
/// States the connect.
/// </summary>
/// <param name="event">The event.</param>
private void State_Connect(State_Event @event)
{
switch (@event)
{
case State_Event.Enter:
delay = 0;
this.UpdateStatus(GuiState.CONNECTING, "Attempting to connect to the plc.");
this.tcpClient = new ClientTCP("PlcTcpClient", this.deviceLogger, this.ipAddress, this.port, this.plcTxFifo);
this.tcpClient.Connected += this.TcpClient_Connected;
this.tcpClient.Disconnected += this.TcpClient_Disconnected;
this.tcpClient.DataAvailable += this.TcpClient_DataAvailable;
this.tcpClient.Connect();
break;
case State_Event.Poll:
delay++;
if (delay > 5)
{
this.StateTrans(PlcState.State_Fault, this.State_Fault);
}
break;
case State_Event.Connected:
this.StateTrans(PlcState.State_Online, this.State_Online);
break;
case State_Event.Disconnect:
this.StateTrans(PlcState.State_Fault, this.State_Fault);
break;
default:
break;
}
}
/// <summary>
/// States the get port.
/// </summary>
/// <param name="event">The event.</param>
private void State_GetPort(State_Event @event)
{
switch (@event)
{
case State_Event.Enter:
this.UpdateStatus(GuiState.CONNECTING, Properties.Resources.GET_PLC_PORT_INFO);
break;
case State_Event.Poll:
if (this.ipAddress != this.defaultIPAddress)
{
this.StateTrans(PlcState.State_Connect, this.State_Connect);
}
else
{
this.StateTrans(PlcState.State_WaitForPortInformation, this.State_WaitForPortInformation);
}
break;
default:
break;
}
}
