ABB FSO-21 - Page 102

102 Safety functions
With an encoder
A SBC speed (parameter SBC.15): Speed limit below which FSO activates the SBC
function (brake) while ramping.
B Zero speed with encoder (parameter FSOGEN.52): Speed limit to define the motor as
stopped. The safety function is completed, the SAR1 ramp monitoring is stopped and the
SS1 completed indication (parameter SS1.22) goes on. The acknowledgment becomes
allowed.
C SBC delay (parameter SBC.12): Time from the activation of the SBC function to the
moment when the FSO activates the drive STO function
.
D 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
7
2
6
SBC output
4
A
D
SS1 completed
indication
SAR1
monitoring
B
3b
5
C
SBC.12
3
- -> Safe torque off (STO)