# AB PLC tag integration with ignition

**URL:** <https://forum.inductiveautomation.com/t/ab-plc-tag-integration-with-ignition/7579>\
**Category:** Archived Topics\
**Created:** [November 18, 2013, 2:21pm UTC](https://forum.inductiveautomation.com/t/ab-plc-tag-integration-with-ignition/7579 "2013-11-18T14:21:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rhythm](https://avatars.discourse-cdn.com/v4/letter/r/5e9695/32.png) [@rhythm](https://forum.inductiveautomation.com/u/rhythm)\
**Post date:** [November 18, 2013, 2:21pm UTC](https://forum.inductiveautomation.com/t/ab-plc-tag-integration-with-ignition/7579/1 "2013-11-18T14:21:36Z")

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I have connected AB Compactlogix with Ignition via OPC connectivity. I have all the tags imported from the PLC.  
When I am changing the status of hardwire inputs, the same is not replicated on ignition. Can someone please tell me the reason?

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**Author:** ![njsd](https://avatars.discourse-cdn.com/v4/letter/n/54ee81/32.png) [@njsd](https://forum.inductiveautomation.com/u/njsd)\
**Post date:** [January 9, 2014, 4:21pm UTC](https://forum.inductiveautomation.com/t/ab-plc-tag-integration-with-ignition/7579/2 "2014-01-09T16:21:36Z")

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What is your OPC connection?

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**Author:** ![WildeKurt](https://avatars.discourse-cdn.com/v4/letter/w/50afbb/32.png) [@WildeKurt](https://forum.inductiveautomation.com/u/WildeKurt)\
**Post date:** [January 9, 2014, 4:36pm UTC](https://forum.inductiveautomation.com/t/ab-plc-tag-integration-with-ignition/7579/3 "2014-01-09T16:36:33Z")

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One thing I’ve noticed with some complex types like UDT’s is that if some changes in the PLC it would not update in the designer unless I went to the Gateway and device, clicked on edit then save changes. Just ‘refreshing’ doesn’t always do the trick.