public static string GetPLCResponseNocheck(int timeout, bool RemoveMessages = true)
{
PLCResponse item;
string msg = "";
if (!PLCUtility.WaitForPLCResponse(timeout))
{
msg = string.Concat("PLC has not responded within a timeout period of ", timeout, " seconds");
}
else
{
lock (PLCUtility.PLCResponseBuffer)
while (PLCUtility.PLCResponseBuffer.Count > 0)
{
item = PLCUtility.PLCResponseBuffer[0];
msg += item.Message + System.Environment.NewLine;
if (RemoveMessages)
{
PLCUtility.PLCResponseBuffer.RemoveAt(0);
}
else
{
break;
}
}
}
return(msg);
}
public static void SendPlcCommand(string cmd)
{
if ((PLCUtility.port == null ? true : PLCUtility.port.PortName != PortName))
{
PLCUtility.InitPort();
}
if (!PLCUtility.port.IsOpen)
{
PLCUtility.port.Open();
}
Debug.WriteLine(string.Concat("SendPLCCommand: |", cmd, "|"));
PLCUtility.port.Write(cmd);
}
public static bool GetPLCResponse(PLCResponseType expectedResponse, int maxNoOfBufferedMessages, out string errorMessage, int timeout)
{
PLCResponse item;
bool flag;
errorMessage = "";
if (!PLCUtility.WaitForPLCResponse(timeout))
{
errorMessage = string.Concat("PLC has not responded within a timeout period of ", timeout, " seconds");
flag = false;
}
else if (PLCUtility.PLCResponseBuffer.Count <= maxNoOfBufferedMessages)
{
lock (PLCUtility.PLCResponseBuffer)
{
item = PLCUtility.PLCResponseBuffer[0];
PLCUtility.PLCResponseBuffer.RemoveAt(0);
}
if (item.PLCResponseType == expectedResponse)
{
flag = true;
}
else
{
errorMessage = string.Concat("Response from PLC was not as expected. Actual response = \"", item.Message, "\" expected type of response = ", expectedResponse.ToString("g"));
flag = false;
}
}
else
{
object[] count = new object[] { "PLC has sent an unexpected no. of messages. Messages in buffer = ", PLCUtility.PLCResponseBuffer.Count, " expected no. of messages = ", maxNoOfBufferedMessages };
errorMessage = string.Concat(count);
flag = false;
}
return(flag);
}
public static bool GetPLCResponse(PLCResponseType expectedResponse, int maxNoOfBufferedMessages, out string errorMessage)
{
return(PLCUtility.GetPLCResponse(expectedResponse, maxNoOfBufferedMessages, out errorMessage, 30));
}
public static void SendPlcStartCommand()
{
PLCUtility.SendPlcCommand("A");
}