ABB FSO-21 - SSE with Ramp Monitoring

120 Safety functions
 SSE with ramp monitoring
The operation of the SSE with ramp monitoring is described in the time diagrams and
tables below. For configuration, see section How to configure SSE with ramp
monitoring on page 355.
With a safe speed estimate
A Zero speed (parameter FSOGEN.51): Speed limit for activating the drive STO function.
The safety function is completed, ramp monitoring is stopped and the SSE completed
indication (parameter SSE.22) goes on. The acknowledgment becomes allowed.
B Response time (depends on system configuration, see page 532)
Ramp monitoring limits
Drive STO state
& indication
SSE request
Motor speed
Time
SSE state &
indication
1
2
5
A
B
SSE completed
indication
3
2b
SAR0
monitoring
4
- -> Safe torque off (STO)