# String Array Data Type

**URL:** <https://forum.inductiveautomation.com/t/string-array-data-type/98902>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [November 20, 2024, 10:45pm UTC](https://forum.inductiveautomation.com/t/string-array-data-type/98902 "2024-11-20T22:45:13Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![pkhoshroo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pkhoshroo/32/26801_2.png) [@pkhoshroo](https://forum.inductiveautomation.com/u/pkhoshroo)\
**Post date:** [November 20, 2024, 10:45pm UTC](https://forum.inductiveautomation.com/t/string-array-data-type/98902/1 "2024-11-20T22:45:13Z")

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Hello Everyone,

I have a simple question, but I'm having a hard time understanding how to use a String Array. I couldn’t find any information about this in the user manual or here in the forum.

In my PLC, I have a UDDT that includes a String[21] data type. I want to create a similar string array in Ignition, but when I try to define String[21] in the data type, it doesn’t work. Also tried the parameter binding and I wasn't susccessful.

Any guidance would be greatly appreciated!

![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/2/1/211b4bf0239a8f540bea380ecbc787f0e19c5c99.png)

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/9/7/97a8b42b756c8b9e8e121f12400d43fac0ab82de.png)

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<div class="post-metadata">

**Author:** ![Transistor](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/transistor/32/3380_2.png) [@Transistor](https://forum.inductiveautomation.com/u/Transistor)\
**Post date:** [November 20, 2024, 10:59pm UTC](https://forum.inductiveautomation.com/t/string-array-data-type/98902/2 "2024-11-20T22:59:37Z")

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It might help to mention the PLC make and model and the OPC driver you're using to connect to it.

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<div class="post-metadata">

**Author:** ![pkhoshroo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pkhoshroo/32/26801_2.png) [@pkhoshroo](https://forum.inductiveautomation.com/u/pkhoshroo)\
**Post date:** [November 20, 2024, 11:02pm UTC](https://forum.inductiveautomation.com/t/string-array-data-type/98902/3 "2024-11-20T23:02:03Z")

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I am using a ControlLogix PLC (1756-L81E, 5580 Controller) and Allen-Bradley Logix OPC Driver

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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:** [November 20, 2024, 11:06pm UTC](https://forum.inductiveautomation.com/t/string-array-data-type/98902/4 "2024-11-20T23:06:31Z")

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IA's Logix doesn't support addressing arrays as arrays. My alternate driver **does** support it, but only for arrays of numbers, not strings.

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<div class="post-metadata">

**Author:** ![pkhoshroo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pkhoshroo/32/26801_2.png) [@pkhoshroo](https://forum.inductiveautomation.com/u/pkhoshroo)\
**Post date:** [November 20, 2024, 11:07pm UTC](https://forum.inductiveautomation.com/t/string-array-data-type/98902/5 "2024-11-20T23:07:20Z")

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I see, thank you for the information, then I am going to have to create a string tag for each of those tags then.