# MicroLogix1400 Tags as Null

**URL:** <https://forum.inductiveautomation.com/t/micrologix1400-tags-as-null/32359>\
**Category:** Ignition Exchange\
**Created:** [February 18, 2020, 1:12am UTC](https://forum.inductiveautomation.com/t/micrologix1400-tags-as-null/32359 "2020-02-18T01:12:37Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![daniel.ferreira](https://avatars.discourse-cdn.com/v4/letter/d/87869e/32.png) [@daniel.ferreira](https://forum.inductiveautomation.com/u/daniel.ferreira)\
**Post date:** [February 18, 2020, 1:12am UTC](https://forum.inductiveautomation.com/t/micrologix1400-tags-as-null/32359/1 "2020-02-18T01:12:37Z")

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Greetings everyone,

I am quite new to Ignition, installed it only a few hours ago been playing with the trial. Trying to understand if its fits for the purpose of a project currently following. So far so good, pretty easy and powerful.

Ignition Version 8.0.8

I trying to set up basic testing, I want to read tags from a MicroLogix1400 PLC.

1. Added the Micrologix1400 on the Ignition Gateway - status reported as "Connected: Protocol EIP
2. Ignition Designer - browsed for device - I/O Tags.
3. Add them to the tags list to be monitored.
4. The I/O Tags report the following error: “[null, Bad, Tue Feb 18 09:55:37 AEDT 2020 (1581980137862)]”

I checked with the AB SW and other SW that I could connect and read those tags. Can reach the PLC, and it’s on RUN.  
Notice that the I/O Tags are coming as short, tried to change the type to Bool.

What else could I try?  
Apologises if this is a basic question, but I am starting I can’t sort it after reading the docs or searching on the forum.

Much Appreciated.

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**Author:** ![daniel.ferreira](https://avatars.discourse-cdn.com/v4/letter/d/87869e/32.png) [@daniel.ferreira](https://forum.inductiveautomation.com/u/daniel.ferreira)\
**Post date:** [February 18, 2020, 1:25am UTC](https://forum.inductiveautomation.com/t/micrologix1400-tags-as-null/32359/2 "2020-02-18T01:25:56Z")

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I think I was checking the wrong tags memory address group from the OPC.

However, the question I have now is it possible to read the raw I/O value from the PLC? That’s where the data was coming as null actually.

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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:** [February 18, 2020, 1:52am UTC](https://forum.inductiveautomation.com/t/micrologix1400-tags-as-null/32359/3 "2020-02-18T01:52:41Z")

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Make sure you reset the trial every two hours. Most drivers go to null when trial mode expires.

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**Author:** ![daniel.ferreira](https://avatars.discourse-cdn.com/v4/letter/d/87869e/32.png) [@daniel.ferreira](https://forum.inductiveautomation.com/u/daniel.ferreira)\
**Post date:** [February 18, 2020, 3:18am UTC](https://forum.inductiveautomation.com/t/micrologix1400-tags-as-null/32359/5 "2020-02-18T03:18:05Z")

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I have found the issue. The problem was the automatic browser by the Ignition was mapping the OPC Item Path as “ns=1;s=[MicroLogix1400]I:0.1”, and by the PLC memory address it should be “ns=1;s=[MicroLogix1400]I0:0/1”.  
Same for the outputs!

Solved 🙂