# OPC UA Connection to AB SLC 5/04 through Digi One IAP Serial Server **URL:** \ **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:** 7\ **Page:** 1
**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, 5:41pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-ab-slc-5-04-through-digi-one-iap-serial-server/23347/1 "2019-03-14T17:41:37Z")
Trying to add an Allen Bradley SLC 5/04 to OPC UA devices with no success. Using a Digi One IAP serial/ethernet server. I am able to connect with RSLinx but connection in OPC UA will not make. Configuring device in OPC UA as SLC and have disabled tag browsing but no joy. Any advice would be much appreciated. Digi One Configuration: Current Port Profile: TCP Sockets Change Profile… The TCP Sockets Profile allows a serial device to communicate over a TCP network. Profile Settings TCP Server Connect to the following TCP ports on the network (calculated from Base Socket). ``` Telnet TCP Port: 2001 Unavailable Raw TCP Port: 2101 Unavailable ``` TCP Client Automatically establish TCP connections to a server or other networked device. Automatically establish TCP connections Connect: Always When data arrives When DCD goes high ``` Connect To: ``` 10.152.148.xxx ``` Service: TCP Port Number: ``` 2101 ``` Connect As: Flush Start Character: Send Keepalive Packets: Auto Drain on Close: ``` ---
**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:** [March 14, 2019, 7:24pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-ab-slc-5-04-through-digi-one-iap-serial-server/23347/2 "2019-03-14T19:24:10Z")
If I recall correctly, these are not supported by IA’s driver. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [March 14, 2019, 7:27pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-ab-slc-5-04-through-digi-one-iap-serial-server/23347/3 "2019-03-14T19:27:56Z")
What’s the connection path / info in RSLinx? @pturmel might be right… but I did just learn there’s an undocumented “feature” in the SLC driver where you can specify an octal station number rather than a connection path. Not sure if that’s what’s needed here or not… ---
**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")
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 ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [March 14, 2019, 7:46pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-ab-slc-5-04-through-digi-one-iap-serial-server/23347/5 "2019-03-14T19:46:03Z")
Try setting up the SLC driver with hostname `10.152.148.xxx,01` and no connection path. If that doesn’t work I have no idea if it’s supported or not. ---
**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, 7:55pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-ab-slc-5-04-through-digi-one-iap-serial-server/23347/6 "2019-03-14T19:55:06Z")
No joy. Kepware the most likely solution? ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [March 14, 2019, 7:55pm UTC](https://forum.inductiveautomation.com/t/opc-ua-connection-to-ab-slc-5-04-through-digi-one-iap-serial-server/23347/7 "2019-03-14T19:55:55Z")
Yes, Kepware likely supports this. Or an OPC Classic connection to RSLinx.