ABB FSO-21 - SS1 with Ramp Monitoring (SS1-R)

84 Safety functions
 SS1 with ramp monitoring (SS1-r)
The operation of the SS1 with ramp monitoring (SS1-r) is described in the time
diagrams and tables below. For configuration, see section How to configure SS1 with
ramp monitoring (SS1-r) on page 342.
With a safe speed estimate
A Zero speed (parameter FSOGEN.51): Speed limit for activating the drive STO function.
The safety function is completed and the SS1 completed indication (parameter SS1.22)
goes on. The acknowledgment becomes allowed.
B Response time (depends on system configuration, see page 532)
Ramp monitoring limits
Drive STO state
& indication
SS1 request
Motor speed
Time
SS1 state &
indication
1
2
5
A
B
SS1 completed
indication
3
2b
SAR1
monitoring
4
- -> Safe torque off (STO)