Read addresses from S7-300

jvdcande said:

Well Bas,

Siemens guards this information as if it was the gold supply located at Forth Worth. You'll find no information about this protocol on the internet. But I happen to know that Philips has the money to pay Siemens for the disclosure of the MPI protocol (in the past I used to work for them). At some time in the past they even had projects in common. if you search this forum, you'll find some others threads asking (almost) the same question. So far nobody has been able to answer.

Kind regards,

Click to expand...

bas said:

Hello,

I am a informatics student from holland, and at this time, I'm doing some programming work for a division of Philips. (work in my free time)

I can do a lot of programming, but now they said: Can you please do write a program that reads some adresses from the Siemens s7-300 via the MPI protocol?

Well, I have never, ever seen a thing like that, and I don't have that PLC to test with, maybe tomorrow or the day after tomorrow.

I talked to the man who knows something about it, and he said what adresses I had to read out. My PC is connected via a RS485 cable

Can you please give me a link with more information, things to take care of or something else? I hope you can help me!

Thanks in advance!

Bas Lijten
Holland

Click to expand...

ALU said:

Dear Mr jvdcande,

I intend to use S7-300 to collect ASCII string from five Displays which can be address assigned(Displays return data on two wire Rs485 port), What Hardware/ Software should I need?
Thanks so much for your help!

BR,
MHA

Click to expand...