Step 7 OPC UA and Java

Hello,

do you have to use a OPC-Server? You could also try to make a direct TCP-Connection from PLC to your PC with your Java Application, even HTTP API is not difficult.

If you need to use OPC, here is a list of cheap/free UA Server:
http://www.opcconnect.com/uafree.php

Greetings

Hello,

Thanks for the reply.

I have to use OPC UA server ,not the classical OPC, I have to take data from S7 300 plc and this data should be transferred in OPC UA server, and i dont know how to do it.

I have searched some server online like Kepware , IBH SOftech ...after the selection of the server i have to programmed OPC UA Client in java....\

so do you know which opc ua server supports java programming language.

Best regards

Saurabh

Every OPC server supports java, as OPC describes only the protocol, not the programming language. Get the OPC-UA specification, and program the OPC-UA client for your own in any language you need. Indeed you could do this also in assembly language.

If you mean you need a programming example for an OPC-UA client in java, then you could use any OPC-UA client example you find. As OPC-UA is the standard, it works (or should work) with every OPC-UA server you have.

I think java is rarely used in the automation business, so you'll get here not too many answers to your java questions.