# First time programming a 4PP015 and I’m not able to establish communication

**URL:** <https://community.br-automation.com/t/first-time-programming-a-4pp015-and-i-m-not-able-to-establish-communication/9017>\
**Category:** HMI & Visualization\
**Created:** [November 14, 2025, 6:25am UTC](https://community.br-automation.com/t/first-time-programming-a-4pp015-and-i-m-not-able-to-establish-communication/9017 "2025-11-14T06:25:19Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![alexander.hefner](https://dub1.discourse-cdn.com/brcommunity/user_avatar/community.br-automation.com/alexander.hefner/32/111_2.png) [@alexander.hefner](https://community.br-automation.com/u/alexander.hefner)\
**Post date:** [November 14, 2025, 11:03am UTC](https://community.br-automation.com/t/first-time-programming-a-4pp015-and-i-m-not-able-to-establish-communication/9017/2 "2025-11-14T11:03:12Z")

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Hi,

as I’m not sure what you’ve already found in the Community posts, could you please check the basic informations about wiring, port settings and so on in the following post?

> [@Determine serial online connection parameters (SG3 legacy systems)](https://community.br-automation.com/t/determine-serial-online-connection-parameters-sg3-legacy-systems/2662):
>
> Most often, B&R’s legacy PLCs (the so called SG3 PLCs out of the system families 2005, 2003, PowerPanel 15/35 and so on) use a serial connection to communicate with Automation Studio (mostly used with the legacy Automation Studio Versions 2.x and 3.x). This post summarizes some basic information about legacy serial online connections (already written here and there in some posts of our Community), and a idea how to determine the serial online settings if they’re unknown. First, here’s a summar…

Best regards!

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