# OPC-DA Connection to logix Emulate

**URL:** <https://forum.inductiveautomation.com/t/opc-da-connection-to-logix-emulate/111204>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [October 6, 2025, 1:09pm UTC](https://forum.inductiveautomation.com/t/opc-da-connection-to-logix-emulate/111204 "2025-10-06T13:09:58Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![Clancy\_Cavanaugh](https://avatars.discourse-cdn.com/v4/letter/c/45deac/32.png) [@Clancy\_Cavanaugh](https://forum.inductiveautomation.com/u/Clancy_Cavanaugh)\
**Post date:** [October 7, 2025, 3:27pm UTC](https://forum.inductiveautomation.com/t/opc-da-connection-to-logix-emulate/111204/7 "2025-10-07T15:27:16Z")

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I found an old thread that may or may not be helpful.

[OPC-DA to RSLinx Classic (Emulated PLC) - General Discussion - Inductive Automation Forum](https://forum.inductiveautomation.com/t/opc-da-to-rslinx-classic-emulated-plc/11667)

The piece that stuck out to me was in step 1 set the default authentication level to default. On my computer that setting is set to connect. I’m very unfamiliar with OPC-DA, but I am wondering if having that setting set to connect allows the connection but not read/write operations.

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