S7 Modbus TCP library blocks

[Marshy]

Hi,
I have a project coming up where I need to communicate a Gem500 with a Siemens S7-300 over ethernet. The Gem500 uses the Modbus TCP protocol.

I've been trying to find some information about the Modbus TCP libary for S7 but am not having much luck ( Does anyone have any experience with these blocks or know where I can get some info? Also how does the licensing of library blocks work?

Any help would be appreciated.

Thanks in advance

Rich

 

[rgua]

where I can get some info?

http://support.automation.siemens.com/WW/llisapi.dll?query=open+modbus+tcp&func=cslib.cssearch&content=skm%2Fmain.asp&lang=en&siteid=cseus&objaction=cssearch&searchinprim=&nodeid99=&x=27&y=11

Also how does the licensing of library blocks work?

You'll have no special floppy, no dongle.