Safely Limited Speed (S Ls) - Siemens Sinamics S120 Function Manual

Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
4.2.9.1 Safely Limited Speed (SLS)
Features
● When SLS is selected, the monitoring only takes effect after the configured delay time
has expired (p9551). Within this time, the actual speed must be below the (selected) limit.
The delay time is not effective when SLS is deselected.
● After switching to a lower limit value (p9531), the actual speed of the drive must have
dropped below the new limit within the delay time (p9551). The existing limit remains
active during the delay time. The lower limit value becomes active after the delay time
expires. This also applies to a reduction of the limit value via PROFIsafe.
● If the actual speed of the drive is higher than the new Safely Limited Speed limit after the
delay time has elapsed, a message is generated with the parameterized stop response.
● The stop response (STOP A, STOP B, STOP C, STOP D or STOP E) is parameterized
with p9563.
● During changeover to a higher limit value, the delay time is not active and the high limit
value becomes immediately active. This also applies to increasing the limit value via
PROFIsafe.
● 4 parameterizable limit values p9531[0...3]
● The first limit value can be entered via the PROFIsafe telegrams 901 and 902 (for
p9501.24 = 1)
● In parameter p9533 enter the weighting factor to determine the setpoint limit from the
selected actual speed limit in percent. The active limit value is evaluated using this factor,
and is provided as setpoint limit in r9733.
– r9733[0] = p9531[x] x p9533 (converted from the load to the motor side)
– r9733[1] = - p9531[x] x p9533 (converted from the load to the motor side)
Conversion factor from the motor to the load side:
– Motor type = rotary and axis type = linear: p9522/(p9521 × p9520)
– Otherwise: p9522/p9521
● Limit value
– r9733[0] = p9531[x] x p9533; x = selected SLS limit value
– r9733[1] = - p9531[x] x p9533; x = selected SLS limit value
r9733 is used, for example, for transferring values to a higher-level controller, which can
then, for example, adjust traversing speeds to the SLS levels or at the setpoint channel
(p1051). r9733 is a part of the Safety Info Channel (SIC).
● The currently monitored limit value is displayed in parameter r9714[2].
100
[x] = selected SLS stage
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated