# OPC UA Connection to AB SLC 5/04 through Digi One IAP Serial Server

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-connection-to-ab-slc-5-04-through-digi-one-iap-serial-server/23347>\
**Category:** General Discussion\
**Created:** [March 14, 2019, 5:41pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-ab-slc-5-04-through-digi-one-iap-serial-server/23347 "2019-03-14T17:41:37Z")\
**Posts on this page:** 1\
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**Author:** ![larry.thigpen](https://avatars.discourse-cdn.com/v4/letter/l/58f4c7/32.png) [@larry.thigpen](https://forum.inductiveautomation.com/u/larry.thigpen)\
**Post date:** [March 14, 2019, 7:40pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-ab-slc-5-04-through-digi-one-iap-serial-server/23347/4 "2019-03-14T19:40:27Z")

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The Rslinx config is:  
(The Digi One creates a virtual com port via the ethernet connection  
AB DF1 - DH485  
Com 5  
It assigns it Node 1

this post on the forum seems to indicate it will work:

> [@DIGI One IAP](http://forum.inductiveautomation.com/t/digi-one-iap/4959):
>
> I have one of these successfully connected to a SLC5/03. I can communiate fine through RsLinx but can not connect via OPC UA. I have it set up as an SLC. The status toggles between ‘Disconnected’ and ‘Connecting’. I essentially have it set up with the standard Allen Bradley configuration (port 2222). Are there any specifics that need to be changed in the IAP’s setup? Thanks

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