Working With S7-300 PLC with PC adapter USB A2

Here we are going to Discuss how to connect to the S7-300 CPU using PC Adapter USB A2 

- PC Adapter USB A2 (Auto) 

- PC Adapter USB A2 (MPI) 

- PC Adapter USB A2 (PROFIBUS)

PC Adapter looks like the picture below 

PC adapter USB A2 USB adapter (USB V2.0) for connection of a PG/PC or notebook to SIMATIC S7 via PROFIBUS or MPI contain USB cable 5 m, MPI cable 0.3 m can be used under Windows XP/Vista/ Windows 7 32/64-bit and higher

Method1 :Connecting the adapter on the X1 MP1 interface 

Connect the other end of the cable to the programming device 

Select PC Adapter USB Auto 1 and press OK

you can also go to diagnostics and press Test which should show OK if the connection is ok.

By using the Read button you can read the Nodes as well.

Method 2 : Connecting on the top of existing Profibus connector for this you need to turn off the resistor switch.

select either Auto or Profibus