# Ignition and router eWon

**URL:** <https://forum.inductiveautomation.com/t/ignition-and-router-ewon/4687>\
**Category:** Ignition\
**Created:** [June 22, 2012, 12:19pm UTC](https://forum.inductiveautomation.com/t/ignition-and-router-ewon/4687 "2012-06-22T12:19:03Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![SamJaimes](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@SamJaimes](https://forum.inductiveautomation.com/u/SamJaimes)\
**Post date:** [June 22, 2012, 12:19pm UTC](https://forum.inductiveautomation.com/t/ignition-and-router-ewon/4687/1 "2012-06-22T12:19:03Z")

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Does Ignition support connection with a PLC Siemens connected to a router eWon? I have understood I need at least 4 parameters:  
[ul]  
Rack number  
Slot number  
Router IP  
ID Subnet  
[/ul]  
For now I have found where to configure all of them except for ID Subnet. Do I need that number?

Thanks for your answers!

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**Author:** ![Greg.Buehler](https://avatars.discourse-cdn.com/v4/letter/g/ecc23a/32.png) [@Greg.Buehler](https://forum.inductiveautomation.com/u/Greg.Buehler)\
**Post date:** [June 22, 2012, 1:33pm UTC](https://forum.inductiveautomation.com/t/ignition-and-router-ewon/4687/2 "2012-06-22T13:33:59Z")

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Igition shouldn’t have any problems consuming your PLC through the eWon unit. I’m assuming that you’re using the Talk2M service?

You might want to refer to their [configuration document](http://wiki.ewon.biz/@api/deki/files/909/=AUG-037-0-EN-(Remote_Access_for_Siemens_S7-300%2526400_PLCs).pdf) if you have any questions about how to configure the connections.

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**Author:** ![chi](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@chi](https://forum.inductiveautomation.com/u/chi)\
**Post date:** [June 22, 2012, 2:15pm UTC](https://forum.inductiveautomation.com/t/ignition-and-router-ewon/4687/3 "2012-06-22T14:15:24Z")

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gbuehler is right, as long as the MPI/Profibus-port of the ewon is not used. With the MPI port, the ewon seems to emulate the subnet routing function of S7 CPU’s, which is not supported by the S7 driver (i posted a feature request some time ago).  
A Simatic S7 CPU is able to work as a router between an ethernet and a MPI/Profibus network, for this function each bus/network has a ‘Subnet-ID’ additional to the device address.

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [June 22, 2012, 2:52pm UTC](https://forum.inductiveautomation.com/t/ignition-and-router-ewon/4687/4 "2012-06-22T14:52:29Z")

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Good to know 🙂