# Rslogix500 "Disconnected: Determining Protocol"

**URL:** <https://forum.inductiveautomation.com/t/rslogix500-disconnected-determining-protocol/95283>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [August 28, 2024, 4:48pm UTC](https://forum.inductiveautomation.com/t/rslogix500-disconnected-determining-protocol/95283 "2024-08-28T16:48:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Rezwan\_Ahmed](https://avatars.discourse-cdn.com/v4/letter/r/bbe5ce/32.png) [@Rezwan\_Ahmed](https://forum.inductiveautomation.com/u/Rezwan_Ahmed)\
**Post date:** [August 28, 2024, 4:48pm UTC](https://forum.inductiveautomation.com/t/rslogix500-disconnected-determining-protocol/95283/1 "2024-08-28T16:48:25Z")

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Hello,  
I am trying to connect ignition with RSLogix 500 through RSLogix Emulator. In device connection i get **Connecting: Browse Pending ...** and **Disconnected: Determining Protocol**.  
i am using device IP as Hostname, connection path, local address empty. Zero TNS Connection False.

Any suggestion to fix this?  
Thank you

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<div class="post-metadata">

**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:** [August 28, 2024, 5:22pm UTC](https://forum.inductiveautomation.com/t/rslogix500-disconnected-determining-protocol/95283/2 "2024-08-28T17:22:58Z")

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Not possible. The legacy emulators do not actually listen on a network interface like the real things. RSLinx Classic OPC DA should work, but won't have compatible OPC Item Paths when you deploy on a real PLC.