# Ignition and old Modicon PLC (PL7) communication

**URL:** <https://forum.inductiveautomation.com/t/ignition-and-old-modicon-plc-pl7-communication/38823>\
**Category:** Ignition\
**Created:** [September 18, 2020, 7:42am UTC](https://forum.inductiveautomation.com/t/ignition-and-old-modicon-plc-pl7-communication/38823 "2020-09-18T07:42:28Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ivan.ivanov](https://avatars.discourse-cdn.com/v4/letter/i/839c29/32.png) [@ivan.ivanov](https://forum.inductiveautomation.com/u/ivan.ivanov)\
**Post date:** [September 18, 2020, 7:42am UTC](https://forum.inductiveautomation.com/t/ignition-and-old-modicon-plc-pl7-communication/38823/1 "2020-09-18T07:42:28Z")

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Hi all,

Has anyone managed to connect a relatively old Modicon PLC to Ignition?  
The PLC is Modicon PL7 (TSXP572623M) and has ethernet port but the only protocols supported I an see are CANBUSOpen and Fieldbus.

I was thinking of using a Prosoft module that would interrogate the PLC over Fieldbus and make data available over Modbus TCP/IP for Ignition to read. Would that work or I am going in the wrong direction?

Any suggestions would be helpful.  
Thanks!  
Ivan

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [September 18, 2020, 12:35pm UTC](https://forum.inductiveautomation.com/t/ignition-and-old-modicon-plc-pl7-communication/38823/2 "2020-09-18T12:35:35Z")

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CanOpen and “Fieldbus” aren’t ethernet protocols. Are you sure that ethernet port doesn’t support Modbus TCP ?

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<div class="post-metadata">

**Author:** ![ivan.ivanov](https://avatars.discourse-cdn.com/v4/letter/i/839c29/32.png) [@ivan.ivanov](https://forum.inductiveautomation.com/u/ivan.ivanov)\
**Post date:** [September 18, 2020, 12:47pm UTC](https://forum.inductiveautomation.com/t/ignition-and-old-modicon-plc-pl7-communication/38823/3 "2020-09-18T12:47:06Z")

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Hi Phil,

You are correct.  
I did a bit of digging and the ETH port indeed supports Modbus over TCP/IP. It was weird it wasn’t stated on the Schneider Website though.

Thanks!