Beckhoff AX8-1 Series Documentation page 12

Product description
Parameterization
Check the parameterization of the TwinSAFE drive option card!
The TwinSAFE drive option card determines errors in the parameterization, but no logical
testing of the parameters or the loaded safety program can take place. Hence, you must
WARNING
ensure by means of an acceptance test that the parameterization and the safety program
are correct for the application. This test must be performed by the machine manufacturer.
The combination of AX8000 and AX8911 may be used in production only when this test
has produced a positive result for all safety-relevant functions.
Avoid incorrect parameterization of the servo drive!
Incorrect parameterization of the servo drive (e.g. current controller oscillates or is too
lethargic) can lead to switch-off. The AX8911 switches the motors of the AX8000 servo
WARNING
drive torque-free. Any motors that are still moving coast to a halt. With suspended or pulling
loads the motors may also accelerate. External safety measures (e.g. mechanical service
brakes) are to be provided by the user to avoid unwanted movements.
Avoid incorrect dimensioning of the servo drive!
Loads that cannot be braked by the AX8000 servo drive (e.g. if the AX8000 servo drive is
under-dimensioned) can lead to switch-off. The AX8911 switches the motors of the AX8000
WARNING
servo drive torque-free. Any motors that are still moving coast to a halt. With suspended or
pulling loads the motors may also accelerate. External safety measures (e.g. mechanical
service brakes) are to be provided by the user to avoid unwanted movements.
External safety measures
Provide for external safety measures for the STO function of the TwinSAFE
drive option card!
If the STO safety function is executed, the connected motors are not braked, but are
WARNING
switched torque-free. This leads to the motors coasting to a halt. The duration of this coast-
ing depends on how much kinetic energy is present in the system. With suspended or
pulling loads the motors may also accelerate. The user must provide appropriate external
safety measures (e.g. mechanical service brakes) to prevent this.
Provide for external safety measures for the error reactions of the TwinSAFE
drive option card!
The STO error reaction is executed if the TwinSAFE drive option card determines an error.
WARNING
If the STO error reaction is executed, the connected motors are not braked, but are directly
switched torque-free. This leads to the motors coasting to a halt. The duration of this coast-
ing depends on how much kinetic energy is present in the system. With suspended or
pulling loads the motors may also accelerate. The user must provide appropriate external
safety measures (e.g. mechanical service brakes) to prevent this.
12 Version: 1.0.0 AX8911 - TwinSAFE Drive Option