Siemens SINUMERIK 828D Function Manual page 28

Description of the Safety Integrated Extended Functions
3.6 Safely Limited Speed (SLS)
Switching over the monitoring limits
When SLS is active, you can switch over between four different speed levels. An exception
is "SLS without selection": In this case, there is only one limit.
● Switching to a lower speed level
● Switching to a higher speed level
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Without brake ramp monitoring with encoder:
The inverter monitors the velocity with the lower SLS level after the "delay time for SLS
changeover" has expired (this is the same delay time that applies after selecting the
function SLS).
If you switch over from a lower to a higher speed level, the inverter immediately monitors
the actual velocity against the higher velocity.
Function Manual, 07/2012, 6FC5397-3EP40-3BA0
Safety Integrated