private void Disconnect()
{
try
{
if (this.connected) this.connected = false;
if (this.socket != null) this.socket.Close();
this.socket = null;
}
catch
{
}
}
private bool Connect()
{
try
{
sar.Base.Program.Log("s7Adaptor.Connect >> " + this.ipAddress);
// TODO: add automatic retry
// open a TCP connection to S7 via port 102
this.socket = new SimpleSocket(this.ipAddress, 102);
// write data to socket
byte[] message = IO.Combine(TPKT, CONNECT_TO_ADAPTER);
EncodeTPKTSize(ref message);
DebugWrite("connect message", message);
byte[] response = socket.Write(message);
DebugWrite("response", response);
this.connected = response.SequenceEqual(CONNECTED_TO_ADAPTER);
// TODO: end of automatic retry
// exchange PDU
message = EncodeTPDU(TPKT_PDU, EXCHANGE_PDU_PARAMETER);
DebugWrite("ExchangePDU", message);
response = socket.Write(message);
DebugWrite("response", response);
}
catch (Exception ex)
{
sar.Base.Program.Log(ex);
return false;
}
return this.connected;
}
