B&R ACOPOSinverter P84, User Manual

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Integrated safety functions
ACOPOSinverter P84 User's Manual 2.10 351
3.4 Incompatibility with the safety functions
3.4.1 Limitations
Motor type
The function PWR (STO) can be used with induction motors.
Requirements for using these safety functions
There are a few requirements that must be satisfied in order to ensure correct operation:
• The size of the motor must be sufficient for the application at hand and not approach its total capacity.
• The speed capacity of the drive has been selected according to the power supply (power grid), operating
sequence, motor and application; it does not approach the limit values of the nominal power.
•
Suitable options can be used as needed. Example: Dynamic brake resistor or motor choke.
• The inverter must be configured in a way suitable for the application with respect to speed and torque. The
speed profile is regulated via the inverter's control loop.
Permissible and impermissible application for the safety function
Permissible application
Fast stop after the STO request or freewheel stop permissible
STO
f
t
Impermissible application
An application with load delay after the shutdown of the inverter or for long/permanent regenerative braking cycles
is not permitted. Fast stop after the STO request or freewheel stop impermissible
STO
f
t