# Micro 820 Slow Modbus response, how to diagnose?

**URL:** <https://forum.inductiveautomation.com/t/micro-820-slow-modbus-response-how-to-diagnose/58908>\
**Category:** Ignition\
**Created:** [April 27, 2022, 3:41am UTC](https://forum.inductiveautomation.com/t/micro-820-slow-modbus-response-how-to-diagnose/58908 "2022-04-27T03:41:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![michael2](https://avatars.discourse-cdn.com/v4/letter/m/3e96dc/32.png) [@michael2](https://forum.inductiveautomation.com/u/michael2)\
**Post date:** [April 27, 2022, 3:41am UTC](https://forum.inductiveautomation.com/t/micro-820-slow-modbus-response-how-to-diagnose/58908/1 "2022-04-27T03:41:49Z")

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I have set up a modbus driver to talk to a Micro 820, but I am getting a massively delayed response. Is there a way I can diagnose the issue further? I don’t understand how it is struggling this much.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/9/19ac0360a9b1fff18e8f4ba3581401e0c5cde3b2.png)

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**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\
**Post date:** [April 27, 2022, 4:06am UTC](https://forum.inductiveautomation.com/t/micro-820-slow-modbus-response-how-to-diagnose/58908/2 "2022-04-27T04:06:48Z")

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Are you using rusty ethernet cable with air gaps? 😂  
Following this one as I’m curious

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**Author:** ![michael2](https://avatars.discourse-cdn.com/v4/letter/m/3e96dc/32.png) [@michael2](https://forum.inductiveautomation.com/u/michael2)\
**Post date:** [April 27, 2022, 4:58am UTC](https://forum.inductiveautomation.com/t/micro-820-slow-modbus-response-how-to-diagnose/58908/3 "2022-04-27T04:58:28Z")

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I went online with the 820, disabled my device in ignition, and then reenabled while watching the comms diagnostics in CCW. had 16 packets with errors and now it kind of works? I'm at a loss.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/9/89c9b95ffa1babd1cfc9d1e264809a173e2946d9.png)

> [@nminchin](#):
>
> Are you using rusty ethernet cable with air gaps? 😂

This is the standard for ~~Queensland~~ Australia.

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<div class="post-metadata">

**Author:** ![michael2](https://avatars.discourse-cdn.com/v4/letter/m/3e96dc/32.png) [@michael2](https://forum.inductiveautomation.com/u/michael2)\
**Post date:** [April 27, 2022, 4:59am UTC](https://forum.inductiveautomation.com/t/micro-820-slow-modbus-response-how-to-diagnose/58908/4 "2022-04-27T04:59:54Z")

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Update: I went offline in CCW and now it is back to ‘normal’.

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/1/d143ff7765e1a2dc6bb676da0d19f58c7d5ab3e7.png)