BECKHOFF AX5805 Installation - Manual (Page 44)

Product description
42 AX5805
3.6.5.3 Description of the SS1 safety function
Figure 26: Description of the Safe Stop 1 function (SS1) with time monitor
When the SS1 function is activated, a timer for t_SS1 is started and the speed of the motor is monitored.
There are two conditions which activate the STO function (removing torque from the motor):
- Condition 1: The STO function will be activated as soon as the speed of the motor falls within the
range of n_Zero_SS1 prior to the t_SS1 timer elapsing.
- Condition 2: If the speed of the motor is not within the range of n_Zero_SS1 when the t_SS1 time
elapses, STO function will be activated regardless of the speed of the motor at the point the timer
elapses.
Whichever condition occurs first will activate the safety function STO, removing torque from the motor.