ABB FSO-21 - Page 130

130 Safety functions
With an encoder
A SBC speed (parameter SBC.15): Speed limit below which FSO activates the SBC
(brake) and drive STO functions while ramping and stops the ramp monitoring.
B Zero speed with encoder (parameter FSOGEN.52): Speed limit to define the motor as
stopped. The safety function is completed, the ramp monitoring is stopped and the SSE
completed indication (parameter SSE.22) goes on. The acknowledgment becomes
allowed.
C 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
6
2
5
SBC output
3
A
C
SSE completed
indication
SAR0
monitoring
B
3b
4
- -> Safe torque off (STO)