ABB FSO-21 - Safety functions

Safety functions 53
5
Safety functions
Contents of this chapter
This chapter describes how the safety functions of the FSO module operate.
The FSO-21 module supports these safety functions:
Safety function Stop category Information Page
Safe torque off (STO) Stop category 0 STO: standard drive feature 67
Safe stop 1 (SS1) Stop category 1 With time (SS1-t) or ramp
monitoring (SS1-r)
79
Safe stop emergency (SSE) Stop category 0
or 1
With immediate STO or
emergency ramp with time or
ramp monitoring
106
Safe brake control (SBC) With STO, SSE and SS1
functions
49
Safely-limited speed (SLS) With time or ramp monitoring 140
Variable Safely-limited
speed (SLS)
Only with PROFIsafe 172
Safe maximum speed (SMS) Function permanently on/off
Two different versions
177
Version 1 178
Version 2 179
Prevention of unexpected
start-up (POUS)
180
Safe speed monitor (SSM) 182