Application Examples - BONFIGLIOLI Vectron ACTIVE CUBE Applications Manual

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Application Examples

The following examples illustrate how the "Safe Torque Off" function works. According to EN 60204,
stop functions are divided in different categories. By suitable safety control devices, stop categories 0
and 1 can be realized in combination with the frequency inverter ACU.
Stop category 0: Stop by immediate disconnection of energy supply to the machine drive elements,
i.e. uncontrolled stop.
Stop category 1: Controlled stop, where energy is still being supplied to the drive elements of the
machine to perform the stopping operation. Energy supply is stopped only after the drive has come to
a standstill.
Stop functions must always have priority over start functions and must work properly in any operation
mode.
Resetting of the stop function must not cause any dangerous state.
The mechanical elements must be dimensioned properly for the stop category used. If, for example, a
mechanical brake is applied in the case of fast-rotating machines via stop category 0, this brake must
be able to stop the machine safely. Wear and tear of the mechanical elements must be considered
during projection for the operating states and indicated in the maintenance instructions.
Stop category 0 always has priority over stop category 1.
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