# Ignition & Logix Best Practice Tips for better communications

**URL:** <https://forum.inductiveautomation.com/t/ignition-logix-best-practice-tips-for-better-communications/60386>\
**Category:** Ignition\
**Tags:** rockwell\
**Created:** [June 5, 2022, 11:46pm UTC](https://forum.inductiveautomation.com/t/ignition-logix-best-practice-tips-for-better-communications/60386 "2022-06-05T23:46:38Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![A\_Power](https://avatars.discourse-cdn.com/v4/letter/a/87869e/32.png) [@A\_Power](https://forum.inductiveautomation.com/u/A_Power)\
**Post date:** [June 5, 2022, 11:46pm UTC](https://forum.inductiveautomation.com/t/ignition-logix-best-practice-tips-for-better-communications/60386/1 "2022-06-05T23:46:38Z")

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Hi All,

After a whole bunch of issues I have gone down the rabbit hole of what is wrong with our setup on site.

I will preface this by saying I a relatively new to all of this.... so be gentle 😛

Based on much reading(such wow) I believe I have a list of things our site could take away for a better system.

Some of them are easy to implement, whilst some of them need... significant work to realize. Especially the AOI approach in point 5 😑

Before going too far and upsetting apple carts. I was hoping to get some oversight from the IA gods. specifically @pturmel and @Kevin.Herron - as it was some of your previous posts that have helped me form some of this picture. The last thing I want to do is find out I misunderstood something and led others astray

I hope that my list (once confirmed as correct) is beneficial to others who may end up in a similar situation with "bad coms" specifically when running Allen Bradley gear as the majority on site.

**What do I mean by bad coms**

- High PLC MSG (Class 3) task loads
- Overload situations on Ignition Device connections
- General network instability

**Levers to pull when it comes to bad comms**

1. Consider utilizing multiple Ignition Device Connections to 1 PLC when using a large number of tags
2. Increase the number of device CIP Connections (CAREFUL - do not go too high - Processor dependent!!!)
3. Increase Scan Mode Class Times in Ignition (OPC Polling rate)
4. Delete Continuous Task in the PLC - always go periodic
5. Do NOT read/write from an Allen Bradley AOI (Add on instruction) - instead use a separate UDT
6. Prime Number scan times - in the PLC (not ignition)

I am happy to share my much longer winded document if these points are correct - but for now I just want to make sure I have things right.

I appreciate any time anyone can give to this post.

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