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What is needed to implement a TCP-communication via Fetch/Write to a Siemens S7 PLC with the CP443-1EX11 network processor on the PC side (Windows, C++) using two TCP and two ISO-on-TCP connections?

Trashed
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  • Just found a [link](http://www.sps-forum.de/hochsprachen-opc/5162-c-winsock-iso-tcp-sps-telegrammen.html) but it is in german. So the only thing I got from this that the Fetch/Write principle is a kind of polling where I actually access a data block. Furthermore the post says that there has to be a documentation but I can't find it. – Trashed Jul 11 '13 at 14:00

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Just a short google search and you can find information at the Siemens web page. The web page links a FETCH/WRITE documentation PDF.

Werner Henze
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  • I was many times at the siemens online support page, but didn't find that pdf. Thanks alot. U made my day. – Trashed Jul 11 '13 at 14:21
  • As far as I've understood (just skimmed through) the documentation is exactly what I need. I'm going to implement the communication-protocol and test it and will give an additional feedback as soon as possible. Thanks alot. – Trashed Jul 11 '13 at 14:40