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I am using Settimino library for communicating with s7-300, getting error.
PLC IP and Device(Arduino Mega 2560 + W21000 shield) IP is ok.

Help required.
my connection code...

Serial Monitor output.....

Cable Connected
Local IP address :

Connecting to
Connection error

What I have tried:

bool Connect()
    int Result=Client.ConnectTo(PLC, 
                                  0,  // Rack (see the doc.)
                                  2); // Slot (see the doc.)
    Serial.print("Connecting to ");Serial.println(PLC);  
    if (Result==0) 
      Serial.print("Connected ! PDU Length = ");
      Serial.println("Connection error");
    return Result==0;

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