Hello,

my client has a problem with STO on drives V90's givnig fault F01611 on both drives.

Both of them have STO from power supply to safety relay NC to STO1, STO2 as cant be seen in the attached pdf.

Is there any problem with the way they are connected?

Thank you for your help,

Martin

Hello,

maybe following FAQ is helpful for you:

SINAMICS V90: drive occasionally occur F1611 alarm when normal running

BR

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