# ControlLogix Array Tag Index Off

**URL:** <https://forum.inductiveautomation.com/t/controllogix-array-tag-index-off/5193>\
**Category:** Ignition\
**Created:** [September 26, 2012, 2:17pm UTC](https://forum.inductiveautomation.com/t/controllogix-array-tag-index-off/5193 "2012-09-26T14:17:12Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![pphillips](https://avatars.discourse-cdn.com/v4/letter/p/da6949/32.png) [@pphillips](https://forum.inductiveautomation.com/u/pphillips)\
**Post date:** [September 26, 2012, 2:17pm UTC](https://forum.inductiveautomation.com/t/controllogix-array-tag-index-off/5193/1 "2012-09-26T14:17:12Z")

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We are using a ControlLogix 1756-L72 with a DINT[2,18] array controller tag. Ignition tag index addressing for this array appears to be 1 off.  
e.g. Ignition Array Tag reference [0,0] reads ControlLogix Array Tag [0,1]  
Ignition Array Tag reference [0, 17] reads ControlLogix Array Tag [1,0]  
Ignition Array Tag reference [1, 17] reads ControlLogix Array Tag [?](value is some large number apparently into another memory space)

RSLogix v19.11, Ignition v7.5.3 on Ubuntu 11.10

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**Author:** ![thechtman](https://avatars.discourse-cdn.com/v4/letter/t/e56c9b/32.png) [@thechtman](https://forum.inductiveautomation.com/u/thechtman)\
**Post date:** [September 26, 2012, 4:32pm UTC](https://forum.inductiveautomation.com/t/controllogix-array-tag-index-off/5193/2 "2012-09-26T16:32:16Z")

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Please set the ABControlLogixTransport logger to “Debug”.  
Next edit the device and save it (this will cause it to reconnect). Then send in the logs. Be sure to include the device name when you send in the logs.

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<div class="post-metadata">

**Author:** ![pphillips](https://avatars.discourse-cdn.com/v4/letter/p/da6949/32.png) [@pphillips](https://forum.inductiveautomation.com/u/pphillips)\
**Post date:** [September 26, 2012, 6:57pm UTC](https://forum.inductiveautomation.com/t/controllogix-array-tag-index-off/5193/3 "2012-09-26T18:57:35Z")

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Please find log attached. The device name is CLGX2AMC.  
[abtransportlogs.bin.gz](https://us1.discourse-cdn.com/inductiveautomation/original/2X/9/93bece4f7df1497b49d240c74799b112e1fdd5f1.gz) (856 KB)

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<div class="post-metadata">

**Author:** ![thechtman](https://avatars.discourse-cdn.com/v4/letter/t/e56c9b/32.png) [@thechtman](https://forum.inductiveautomation.com/u/thechtman)\
**Post date:** [September 26, 2012, 10:53pm UTC](https://forum.inductiveautomation.com/t/controllogix-array-tag-index-off/5193/4 "2012-09-26T22:53:09Z")

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I am sending you a updated version of the A-B driver module for you to test.