BECKHOFF AX5805 Installation - Manual (Page 12)

Product description
10 AX5805
WARNING
Activating or restarting a project in the TwinCAT System Manager
Activating or restarting a project in the TwinCAT System Manager activates STO (Safe
Torque Off), removing all torque from the motor. Any motors that are moving coast to a
stop. If there are loads suspended from the motor, the motor may even be accelerated.
The user must provide external safety mechanisms (e.g. mechanical brakes) to prevent
such inadvertent motion.
WARNING
Downloading the safety project to the EL6900 TwinSAFE PLC
Downloading the safety project to the EL6900 TwinSAFE PLC activates STO (Safe
Torque Off), removing all torque from the motor. Any motors that are moving coast to a
stop. If there are loads suspended from the motor, the motor may even be accelerated.
The user must provide external safety mechanisms (e.g. mechanical brakes) to prevent
such inadvertent motion.
WARNING
The servo drive must be configured correctly
Incorrect parameterization of the servo drive (e.g. current controller oscillates or is too
lethargic) activates STO (Safe Torque Off). Any motors that are moving coast to a stop. If
there are loads suspended from the motor, the motor may even be accelerated. The user
must provide external safety mechanisms (e.g. mechanical brakes) to prevent such
inadvertent motion.
WARNING
The servo drive must be dimensioned appropriately
Loads that cannot be stopped by the AX5000 servo drive without faulting (e.g. if the
AX5000 servo drive is under-dimensioned) activate STO (Safe Torque Off). Any motors
that are moving coast to a stop. If there are loads suspended from the motor, the motor
may even be accelerated. The user must provide external safety mechanisms (e.g.
mechanical brakes) to prevent such inadvertent motion.
WARNING
Change of the EtherCAT State
When changing the EtherCAT state of the AX5805 to BOOT, the disconnecting circuits will
be switched off immediatelly and the brake stays in its current state. Due to this it can
happen that the brake remains opened in case of standstill.
In general the axis has to be in a safe state that it is allowed to change the EtherCAT
state.