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ABB ACS850 Drive
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Dec 20, 2021 9:56 am
How can resolve problem F0021 STO1 LOST Fault in ABB ACS850 Drive ?
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Dec 20, 2021 9:57 am
Cause : Safe torque off function is active, i.e. safety circuit signal 1 connected between XSTO:1 and XSTO:3 is lost.
Check safety circuit connections.