Exchanging data via profinet

I'm wanting to set up a network of 4 315-PN/DP
PLCs.

I will have one PLC that will take the speeds
from the other 3 machines (as words) and display
them on a HMI.

I've no experience with Profinet and would like
to use this method (I could do this with Profibus
but, as a learning exercise, I would like to know
how this could be done in Profinet).

I can configure the machines to have IP
addresses:
Machine 1 - 192.168.0.1
Machine 2 - 192.168.0.2
Machine 3 - 192.168.0.3
Central PLC - 192.168.0.10

I just don't know how I set up which 'words' get
passed along the network and also how I address
the words at the other end?

i.e.
I have set up my Central PLC in the hardware
config but it won't let me then 'hang' other PLCs from the Ethernet link?

Has anyone any idea how I would get one word from each PLC back to the central (or main) PLC ?

Many thanks for any light you can shed on this.

;-)

There are 3 main ways to do it.

1. By an S7 connection and PUT/GET.
This is quite easy.
Simply, in NetPro, setup an S7 connection between the each CPU. Make a note of the connection ID number.
Use the ID number when you add the PUT or GET blocks to the user programs.

2. By Send-Receive.
This is more complicated.
An advantage is that the receiver has control over if the data shall be received, and where to store it.
Here is a sample with ISO-on-TCP protocol:
http://support.automation.siemens.com/WW/view/en/29737976

3. By PN IO and and one CPU being an "I device" for the other CPU.
This will have the greatest performance.
Read chapter 4.8 in this manual:
http://support.automation.siemens.com/WW/view/en/19292127

I couldnt Find anything on siemmens but I had a pdf on how to set up a Siemmens with Emerson Drive. Maybee this will help give you an Idea on how to set it up.. Couldnt hurt anyway.

http://www.sks.fi/download/sks_Unid... with PROFINET and Unidrive SP (COMMS045).pdf

sjohnson said:

I couldnt Find anything on siemmens but I had a pdf on how to set up a Siemmens with Emerson Drive. Maybee this will help give you an Idea on how to set it up.. Couldnt hurt anyway.

http://www.sks.fi/download/sks_Unid... with PROFINET and Unidrive SP (COMMS045).pdf

Click to expand...

That is a PN IO Device. It is a bit different when it is CPU. A CPU is an 'intelligent' device (I-Device).

Thank you very much for the info. I'm just reading that manual you recommended Jesper. Hopefully I'll find the answers in there.

Will get back if I still have questions.

Thank you once again. ;-)