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F0021 STO1 LOST Fault in ABB ACSM1 Drive

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(@click2electro)
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How can resolve problem F0021 STO1 LOST Fault in ABB ACSM1 Drive ?

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Posts: 12619
Admin
Topic starter
(@click2electro)
Member
Joined: 3 years ago

Cause : Safe Torque Off function is active, i.e. safety circuit signal 1 connected between X6:1 and X6:3 is lost while drive is at stopped state and parameter 46.07 STO DIAGNOSTIC setting is (2) Alarm or (3) No

Check safety circuit connections.

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