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F0046 STO2 LOST Fault in ABB ACS355 Drive

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(@click2electro)
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How can resolve problem F0046 STO2 LOST Fault in ABB ACS355 Drive ?

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Posts: 14980
Admin
Topic starter
(@click2electro)
Member
Joined: 3 years ago

Cause : STO (Safe torque off) input channel 2 has not de-energized, but channel 1 has. Opening contacts on channel 2 might have been damaged or there is a short-circuit.

Check STO circuit cabling and opening of contacts in STO circuit.

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