Siemens S7/300 communication

[ColDavies]

I am trying to talk to a siemens PLC (CPU315)using TCPIP sockets. This method works for telemechanique and modicon PLCs but i am having difficulty in connecting to a siemens CP-343. I can ping the PLC but a connect does not work.
I believe that the PLC will support TCP Native and UDP protocols, but I have limited knowledge of Step 7. I may have a configuration problem, does anyone have any clues ?

 

[dloos]

Use the INAT VCOM program.
VCOM is a program that runs in the background and redirects the data addressed to your serial port to the Ethernet card.
You can download the VCOM program from

http://www.inat.de

and test it. It is easy to configure and you then can use your normal programs such as Step7 with the serial port.
Try it.
Cheers Dieter Loos