Siemens SINAMICS S120 Function Manual page 44

Extended Functions
4.4 Safely Limited Speed (SLS)
delay time if a lower speed limit is selected. A delay time is not set if a higher speed limit is
selected.
Figure 4-4
A speed setpoint limit can be set as percentage in p9533. This value is used to calculate a
speed setpoint limit r9733, depending on the selected speed limit p9531[x].
By contrast to SI limit parameters, this parameter specifies limits on the motor side instead of
limits on the load side.
● r9733[0] = p9531[x] * p9533; x = selected SLS stage
● r9733[1] = - p9531[x] * p9533; x = selected SLS stage
Responses
Speed limit 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
Features
● 4 programmable limits p9331[0...3] and p9531[0...3]
● Programmable stop response by means of p9363/p9563
Changeover of speed limits
The changeover is controlled by means of binary signals from two F-DIs. The speed
selection status can be checked at the r9720.9/r9720.10 parameters. Parameters r9722.9
and r9722.10 indicate the actual speed limit, bit r9722.4 must carry a "1" signal.
44
v
v1
v 2
Delay time
Delay time SLS phase changeover
Function Manual, (FHS) , 07/2007 Edition, 6SL3097-2AR00-0BP0
t
Safety Integrated