# Array Tag Siemens

**URL:** <https://forum.inductiveautomation.com/t/array-tag-siemens/74224>\
**Category:** Ignition\
**Tags:** ignition81, ignition80\
**Created:** [May 26, 2023, 3:08pm UTC](https://forum.inductiveautomation.com/t/array-tag-siemens/74224 "2023-05-26T15:08:45Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![stefano.sforna](https://avatars.discourse-cdn.com/v4/letter/s/91b2a8/32.png) [@stefano.sforna](https://forum.inductiveautomation.com/u/stefano.sforna)\
**Post date:** [May 26, 2023, 3:08pm UTC](https://forum.inductiveautomation.com/t/array-tag-siemens/74224/1 "2023-05-26T15:08:45Z")

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Good afternoon,  
Is it possible to implemented an OPC array tag with Siemens S7-1500???

Thank you

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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:** [May 26, 2023, 3:17pm UTC](https://forum.inductiveautomation.com/t/array-tag-siemens/74224/2 "2023-05-26T15:17:03Z")

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With an OPC UA connection to the built in OPC UA server that is available on the S7-1500, yes.

With the Ignition OPC UA server, using the S7 driver to connect, no.

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<div class="post-metadata">

**Author:** ![stefano.sforna](https://avatars.discourse-cdn.com/v4/letter/s/91b2a8/32.png) [@stefano.sforna](https://forum.inductiveautomation.com/u/stefano.sforna)\
**Post date:** [May 27, 2023, 9:15am UTC](https://forum.inductiveautomation.com/t/array-tag-siemens/74224/3 "2023-05-27T09:15:18Z")

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I connect Ignition with an OPC UA Server in a s7-1200 CPU Siemens.  
I imported from UA Server a float array but value of this array is null.  
See image in attach.

 ![float_array](https://us1.discourse-cdn.com/inductiveautomation/original/3X/1/e/1ec01518b8f1f9b549fd312a1553e56e77f1586a.jpeg)

Why??

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<div class="post-metadata">

**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:** [May 27, 2023, 12:50pm UTC](https://forum.inductiveautomation.com/t/array-tag-siemens/74224/4 "2023-05-27T12:50:57Z")

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Arrays in the S7-1200 seem to be broken. [This thread](https://forum.inductiveautomation.com/t/opc-connections-between-ignition-and-siemens-plc/73887/10) found the same thing, even when using UaExpert.

The S7-1200 and S7-1500 have entirely independent OPC UA implementations and limitations.

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<div class="post-metadata">

**Author:** ![g.cascales](https://avatars.discourse-cdn.com/v4/letter/g/71c47a/32.png) [@g.cascales](https://forum.inductiveautomation.com/u/g.cascales)\
**Post date:** [May 29, 2023, 6:02am UTC](https://forum.inductiveautomation.com/t/array-tag-siemens/74224/5 "2023-05-29T06:02:23Z")

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@Kevin.Herron thanks for the quick responses.

I think I finally got it working.

Using the S7-1200 I was able to read the whole array, but the firmware version of the PLC must be \> 4.5, and TIA Portal \> V16.

I will do more tests and if anything comes up, I will let you know in this post.