Safe Acceleration Monitor (Sbr) - Siemens SINAMICS S120 Function Manual

Safety Integrated Extended Functions

5.8 Safe Acceleration Monitor (SBR)

5.8 Safe Acceleration Monitor (SBR)
Safe Acceleration Monitor with encoder
The "Safe Acceleration Monitor" (SBR) function is used to safely monitor drive acceleration.
This function is part of the SS1 (time and acceleration-controlled) and SS2 (or STOP B and
STOP C) safety functions.
Features
A STOP A is generated if any drive acceleration within the ramp-down phase exceeds the
tolerance defined in p9348/p9548. The monitoring function is activated for SS1 (or STOP B)
and SS2 (or STOP C) and is deactivated after the speed drops below the value set in
p9368/p9568.
NOTICE
If 0 is entered for p9368/p9568, the speed limit of the SSM function (p9346/p9546) is also
used as shutdown limit for the SBR function (safe acceleration monitoring). The SBR is
deactivated if the speed is below this limit.
In this case, the effects of safe acceleration monitoring are therefore greatly restricted if a
relatively high SSM/SBR velocity limit is set when using the SS1 and SS2 stop functions.
Figure 5-8
84
Characteristics of the shutdown limit for SBR
Function Manual, (FHS), 11/2009, 6SL3097-4AR00-0BP0
Safety Integrated