# Tune Master cannot connect

**URL:** <https://tech-community.robotics.abb.com/t/tune-master-cannot-connect/11091>\
**Category:** IRC5\
**Created:** [April 17, 2023, 9:35am UTC](https://tech-community.robotics.abb.com/t/tune-master-cannot-connect/11091 "2023-04-17T09:35:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![matti](https://avatars.discourse-cdn.com/v4/letter/m/e480ec/32.png) [@matti](https://tech-community.robotics.abb.com/u/matti)\
**Post date:** [April 17, 2023, 9:35am UTC](https://tech-community.robotics.abb.com/t/tune-master-cannot-connect/11091/1 "2023-04-17T09:35:55Z")

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Hallo,  
I try to use TuneMaster for servo tuning but when connecting, there is an error SYS\_CTRL\_E\_UAS\_REJECT and connection is not possible. I am at “default” with admin rights.

Signal logging is working without problems.  
Does anybody have a clue?

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<div class="post-metadata">

**Author:** ![matti](https://avatars.discourse-cdn.com/v4/letter/m/e480ec/32.png) [@matti](https://tech-community.robotics.abb.com/u/matti)\
**Post date:** [April 17, 2023, 2:25pm UTC](https://tech-community.robotics.abb.com/t/tune-master-cannot-connect/11091/2 "2023-04-17T14:25:17Z")

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I found the reason: Controller must be in automatic mode to connect for tuning…