WEG SCA06 User Manual page 24

Maintenance
NOTE!
In case of maintenance of the machine or system, the complete safety
of the machine must be retested in order to check the integrity of safety
of the machine or system.
Additionally, in case of a change or modification, the validation of the
safety function must be repeated and documented.
ATTENTION!
If, during the activation of the Safe Torque Off, occurs a simultaneous
fault on two or more IGBTs of the servodrive, the servodrive can deliver
sufficient energy to cause a magnetic alignment of the rotor and the
internal magnetic poles of the motor. This movement can be up to a
maximum of 180° of the motor shaft, depending on the number of
poles of the motor. Be sure that this movement cannot cause harm to
people or damages to machinery.
24 | SCA06