ABB FSO-21 - Page 138

138 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 SAR0 ramp monitoring is stopped and the
SSE completed indication (parameter SSE.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
SSE request
Motor speed
Time
SSE state &
indication
1
7
2
6
SBC output
4
A
D
SSE completed
indication
SAR0
monitoring
B
3b
5
C
SBC.12
3
- -> Safe torque off (STO)