# Groov Rio not connecting to Ignition Modbus TCP

**URL:** <https://forum.inductiveautomation.com/t/groov-rio-not-connecting-to-ignition-modbus-tcp/114531>\
**Category:** General Discussion\
**Tags:** ignition81\
**Created:** [March 17, 2026, 7:40pm UTC](https://forum.inductiveautomation.com/t/groov-rio-not-connecting-to-ignition-modbus-tcp/114531 "2026-03-17T19:40:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Garron\_Miller](https://avatars.discourse-cdn.com/v4/letter/g/a9adbd/32.png) [@Garron\_Miller](https://forum.inductiveautomation.com/u/Garron_Miller)\
**Post date:** [March 17, 2026, 7:40pm UTC](https://forum.inductiveautomation.com/t/groov-rio-not-connecting-to-ignition-modbus-tcp/114531/1 "2026-03-17T19:40:41Z")

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Having trouble with a Groov Rio from Opto 22. I'm having trouble connecting to Ignition. I have included the Groov information and Ignition Modbus TCP setup. The status is also connecting, then says disconnected, then cycles through again. Any help would be appreciated. I wonder if I have something wrong with some setting in Ignition. Everything checks out with Modscan. I reached out to Opto 22, and they reviewed it and said everything was configured correctly.

 ![529ycoko](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/0/501e409e71f80694f991318d43831a6786c740d7.jpeg)

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/3/d3fe0611b5e513fa6bd3839abe93fcd95f3a0f04.gif)

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<div class="post-metadata">

**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:** [March 17, 2026, 8:48pm UTC](https://forum.inductiveautomation.com/t/groov-rio-not-connecting-to-ignition-modbus-tcp/114531/2 "2026-03-17T20:48:54Z")

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> [@Garron\_Miller](#):
>
> The status is also connecting, then says disconnected, then cycles through again.

Have you subscribed to at least one address? It is common for Modbus devices to kill connections that are otherwise idle, typically after ten seconds.

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<div class="post-metadata">

**Author:** ![lane.duncan](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/lane.duncan/32/83700_2.png) [@lane.duncan](https://forum.inductiveautomation.com/u/lane.duncan)\
**Post date:** [March 18, 2026, 5:45am UTC](https://forum.inductiveautomation.com/t/groov-rio-not-connecting-to-ignition-modbus-tcp/114531/3 "2026-03-18T05:45:34Z")

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Are there any messages in the log files?

Are you running Modscan on the same machine as the gateway?