I need some help on how to write an interface to a Siemens S7 PLC 300/400, via TCP/IP connection from a PC.

I prefer delphi and c/c++ programming.

I'm not looking for OPC solutions.

Any ideas, links, etc. for this.

 

You will either need Prodave from Siemens or a similar product from another vendor.
Or you may look at
http://libnodave.sourceforge.net
which is an open source communication library for the S7 family for LINUX. You would have to replace the OS specific code to make it work on windows.

 

Dear Sir,

You have several options, but the easiest for me are using a IT card so you can:

send an email to the PLC
receive email from the PLC
Interchange data via FTP
Control PLC through a WEB interface

I hope it's helpful.

 

There's sufficient information on "Simatic Net Manual Collection" CD from Siemens.

You can also try to search for it at:
http://www.ad.siemens.de/simatic/portal/html_76/techdoku.htm

 

I am facing the same problem! did you invent the wheel? If so, it would be silly of me to reinvent it ) How did you come around it?

 

Just use a Netlinak adapter.
This adapter converts MPI or Profibus to TCP/IP.

http://www.helmholz.de

they also have examples in delphi to communicate with the netlink.

Benthouse

 

Yes, of course the same solution comes from IBH, called IBH-Link with a unit direct for Delphi etc. and it's working well...

Hi Benthouse. I've don't seen you for a long time... If you want, plz contact me: mailto:[email protected]

 

Link has been changed to

http://www.automation.siemens.com/simatic/portal/html_76/techdoku.htm