# Modicon Momentum PLC Conectiong and disconnecting

**URL:** <https://forum.inductiveautomation.com/t/modicon-momentum-plc-conectiong-and-disconnecting/7894>\
**Category:** Ignition\
**Created:** [January 23, 2014, 3:23pm UTC](https://forum.inductiveautomation.com/t/modicon-momentum-plc-conectiong-and-disconnecting/7894 "2014-01-23T15:23:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![DaveDet](https://avatars.discourse-cdn.com/v4/letter/d/c57346/32.png) [@DaveDet](https://forum.inductiveautomation.com/u/DaveDet)\
**Post date:** [January 23, 2014, 3:23pm UTC](https://forum.inductiveautomation.com/t/modicon-momentum-plc-conectiong-and-disconnecting/7894/1 "2014-01-23T15:23:48Z")

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We have Modicon Quantum’s and Momentum PLC’s in our facility. I can connect (and stay connected) to the Quantum’s. I’ve tried 3 Momentum PLC’s and the status on the Devices page constantly show “Connected” and then 4-5 seconds later “Disconnected”. It continues to change status until I delete the connection. I’ve gone through the Advance settings Enabling and disabling each one to see if any would have an effect on the connection stability, nothing changed. I tried setting up the ModBus RTU over TCP…that didn’t work either.

I didn’t try setting up tags as I’ sure this should stay stable in the “Connected” state.

Any one have any ideas?

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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:** [January 23, 2014, 3:36pm UTC](https://forum.inductiveautomation.com/t/modicon-momentum-plc-conectiong-and-disconnecting/7894/2 "2014-01-23T15:36:13Z")

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Have you subscribed to any tags on it yet? Most Modbus devices will close inactive TCP connections, while Ignition’s drivers will keep reconnecting.