# AcoposMulti 6055 Holding Brake

**URL:** <https://community.br-automation.com/t/acoposmulti-6055-holding-brake/4425>\
**Category:** Mechatronics & Motion\
**Tags:** acopos-multi\
**Created:** [September 27, 2024, 6:53am UTC](https://community.br-automation.com/t/acoposmulti-6055-holding-brake/4425 "2024-09-27T06:53:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Michael\_Hasslach](https://avatars.discourse-cdn.com/v4/letter/m/FF8800/32.png) [@Michael\_Hasslach](https://community.br-automation.com/u/Michael_Hasslach)\
**Post date:** [September 27, 2024, 6:53am UTC](https://community.br-automation.com/t/acoposmulti-6055-holding-brake/4425/1 "2024-09-27T06:53:49Z")

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Hello Community,

i have a problem with AcoposMulti. Several drives, but three of them sporadically get Error 6055 Holding Brake signal to low. Happens nearly every time after startup and then serveral times a day.  
We checked parameters, no issues.  
We checked wiring in case of emc problems, not able to find any cause. No other Machines running next to ours.  
Has someone ever had a similar problem or any idea what to check?  
(AS 4.12 with ACP10 5.24)

best regards

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**Author:** ![Martin.Schrott](https://avatars.discourse-cdn.com/v4/letter/m/FF8800/32.png) [@Martin.Schrott](https://community.br-automation.com/u/Martin.Schrott)\
**Post date:** [September 27, 2024, 8:51am UTC](https://community.br-automation.com/t/acoposmulti-6055-holding-brake/4425/2 "2024-09-27T08:51:33Z")

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A detailed description of this error number can be found here:  
[Error 6055](https://help.br-automation.com/#/en/4/ncsoftware/acp10_errortext/html/6055.htm)

Please check “Cause and remedy”.

If that does not help, please contact your local B&R office for support.

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**Author:** ![jan.zabka](https://avatars.discourse-cdn.com/v4/letter/j/FF8800/32.png) [@jan.zabka](https://community.br-automation.com/u/jan.zabka)\
**Post date:** [September 30, 2024, 7:21am UTC](https://community.br-automation.com/t/acoposmulti-6055-holding-brake/4425/3 "2024-09-30T07:21:56Z")

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Hi Michael,

I had a similar problem but on a three-axis acopos p3. There were several such ACOPOS in my configuration. The holding brake is powered by the 24 VDC power supply of ACOPOS. When we connected the problematic ACOPOS to another 24V source (circuit breaker), the problem with the brake stopped.

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**Author:** ![Michael\_Hasslach](https://avatars.discourse-cdn.com/v4/letter/m/FF8800/32.png) [@Michael\_Hasslach](https://community.br-automation.com/u/Michael_Hasslach)\
**Post date:** [February 27, 2025, 6:09pm UTC](https://community.br-automation.com/t/acoposmulti-6055-holding-brake/4425/4 "2025-02-27T18:09:51Z")

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> [@jan.zabka](#):
>
> problem but on a three-axis acopos p3. There were several such ACOPOS in my configuration. The holding brake is powered by the 24 VDC power supply of ACOPOS. When we connected the problematic ACOPOS to another 24V source (circuit breaker), the problem with the brake sto

Hi and thanks for this hint. We found exactly the same solution. External 24V power supply needed.