labview and siemens plc

[Markus Manninger]

Hi,

Has anyone experiences using labview and a siemens simatic S7-300 plc. I
have to communicate with the plc and want to write an read values
directly via ehternet from labview. I would prefer ehternet because
profibus cards are much more expensive. Maybe someone could give me a
link or example code fo that solution.

best regards,
Max

[waldemar.hersacher]

Hi Markus,

one of my customer is using OPC server to talk to a S7. This was a larger project and the S7 part was the one he was doing.

There is a S7 OPC-Server available from deltalogic. They have a LabVIEW library and a demo version.

Waldemar

[Markus Manninger]

waldemar.hersacher wrote:
> Hi Markus,
>
> one of my customer is using OPC server to talk to a S7. This was a
> larger project and the S7 part was the one he was doing.
>
> There is a S7 OPC-Server available from
> href="www.deltalogic.de">deltalogic. They have a LabVIEW library
> and a demo version.
>
> Waldemar

That sounds good!

A direct access to the plc registers would be the easiest way and sould
cause no problems. I just whant to know if i need a special Ethernet
connection (Industrial Ethernet) or if i can thake a standart Ethernet
card for the PC. Is the Hardware different or do they just use another
protocol?

Max

[waldemar.hersacher]

Hi Max,

you need a normal ethernet card in the PC, in the S7-300 it's a CP 343-1 in the S7-400 a CP 443-1.

I don't know which port is used for the communication. If you have a personal fire wall running on your local machine or between your machine and the S7 the connection may not be successfull.

Waldemar