# Read AB - ControlLogix Boolean Array Tags

**URL:** <https://forum.inductiveautomation.com/t/read-ab-controllogix-boolean-array-tags/105818>\
**Category:** Ignition\
**Tags:** ignition81, vision\
**Created:** [May 2, 2025, 12:23pm UTC](https://forum.inductiveautomation.com/t/read-ab-controllogix-boolean-array-tags/105818 "2025-05-02T12:23:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sharan](https://avatars.discourse-cdn.com/v4/letter/s/258eb7/32.png) [@sharan](https://forum.inductiveautomation.com/u/sharan)\
**Post date:** [May 2, 2025, 12:23pm UTC](https://forum.inductiveautomation.com/t/read-ab-controllogix-boolean-array-tags/105818/1 "2025-05-02T12:23:24Z")

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I am trying to read Boolean array tags from Rockwell - Compactguardlogix PLC.using Logix driver.  
The tas in plc is ABC[32] - Boolean Array.  
This tag is coming in ignition as ABC\_0\_ , i can directly write interger values 0 -32 , in tag browser , but i am not able to read this tag or write this tag via scripting,  
I referred the manual and found that the tag can be ABC[0].1 ....ABC[0].31 , but if i use this tag i am not able to read/write in ignition. whats wrong here ?

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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:** [May 2, 2025, 12:26pm UTC](https://forum.inductiveautomation.com/t/read-ab-controllogix-boolean-array-tags/105818/2 "2025-05-02T12:26:50Z")

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1. Boolean arrays in Logix PLCs are not exposed to the world as actual booleans, but as bits in a DWORD array. 32 booleans per DWORD.

2. Be sure the boolean array tag in Logix is set to External Access: Read/Write.