100 Safety functions
With ramp monitoring (SS1-r)
The operation of the SS1-r function with speed limit activated SBC, SBC before STO
is described in the time diagrams and tables below. For configuration, see section
How to configure SS1 with speed limit activated SBC, SBC before STO on page 347.
With a safe speed estimate
A SBC speed (parameter SBC.15): Speed limit below which the FSO activates the SBC
function (brake) while ramping. The SAR1 ramp monitoring is stopped.
B SBC delay (parameter SBC.12): Time from the activation of the SBC function to the
moment when the FSO activates the drive STO function
.
C SBC time to zero (parameter SBC.13): Time from the SBC activation to the moment
when the safety function is completed and the SS1 completed indication (parameter
SS1.22) goes on. The acknowledgment becomes allowed. You must set this to the
estimated time in which the motor brakes to a stop from the maximum speed.
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 5
SBC output
3
A
D
SS1 completed
indication
SAR1
monitoring
3b
B
SBC.12
C
SBC.13
4 6
- -> Safe torque off (STO)
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