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What causes "dis" error on Lexium 32 ?

The error "dis" seen on the display of Lexium 32 is caused by the following possible faults.

1. Missing mains voltage.   ( missing mains voltage will render the drive in a state where operation is not possible, therefore error "dis" will be seen on the display )
2. Missing one or both of the safe torque off inputs  ( The STO_A and STO_B (safe torque off) inputs must both be at 24 volts or the drive will switch to a disabled state and operation will not be possible, therefore "dis" will be seen on the display )

 
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