ABB ACS355 Drive
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Dec 16, 2021 11:59 am
How can resolve problem F0046 STO2 LOST Fault in ABB ACS355 Drive ?
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Dec 16, 2021 12:00 pm
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.
