Siemens SINAMICS S120 Function Manual page 76

Safety Integrated Extended Functions
5.6 Safely-Limited Speed (SLS)
Changeover of speed limits
The changeover is controlled binary-coded via two F-DIs. The speed selection status can be
checked using parameters r9720.9/r9720.10. Parameters r9722.9 and r9722.10 indicate the
actual speed limit, bit r9722.4 must carry a "1" signal.
Table 5- 1
F-DI for bit 0 (r9720.9)
The changeover from a lower to a higher speed limit takes effect without any delay.
The changeover from a higher to a lower limit triggers a delay time which can be set at the
corresponding parameter (p9351 and p9551).
To ensure that the drive reaches the reduced speed below the new speed limit value once
the delay time has elapsed, it must be decelerated accordingly within the delay time by
means of the higher-level motion control/setpoint channel.
SLS level 1 must be defined as the lowest speed limit value.
SLS level 1 is activated after two unacknowledged discrepancy errors; in other words, 0 is
the fail-safe value for the 2 F-DIs for speed level selection. The SLS levels to be switched
between should, therefore, always be parameterized in ascending order, e.g. with SLS level
1 as the lowest speed and SLS level 4 as the highest.
Responses
Speed limit value exceeded:
● Configured subsequent stop STOP A / B / C / D by means of p9363/p9563
● Safety message C01714/C30714
System errors:
● STOP F
● Safety messages C01711/C30711
76
Changeover of speed limits:
0
0
1
1
CAUTION
F-DI for bit 1 (r9720.10)
0
1
0
1
Function Manual, (FHS), 11/2009, 6SL3097-4AR00-0BP0
Speed limit
p9331[0]/p9531[0]
p9331[1]/p9531[1]
p9331[2]/p9531[2]
p9331[3]/p9531[3]
Safety Integrated