Technical data

Safety Integrated Functions
8.5 Safety Integrated Extended Functions
Function Manual
378 Function Manual, 06/2012, 6SL3097-4AB10-0BP4
8.5.6.1 Safely Limited Speed (SLS)
Features
● After switching to a lower Safely Limited Speed limit value (p9331/p9531), the actual
speed of the drive must have dropped below the new Safely Limited Speed limit within
the delay time (p9351/p9551). The existing Safely Limited Speed limit remains active
during the delay time. The lower Safely Limited Speed limit becomes active after the
delay time has elapsed.
● 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 created with the parameterized stop response.
● The stop response (STOP A, STOP B, STOP C or STOP D) is parameterized with
p9363/p9563.
● The delay time is not active when switching over to a higher Safely Limited Speed limit –
the higher Safely Limited Speed limit (SLS limit value) is active immediately.
● 4 parameterizable Safely Limited Speed limit values p9331[0...3] and p9531[0...3]
Delay time
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Figure 8-7 Safely Limited Speed limit delay time
● In parameter p9533, enter the factor for the speed setpoint limitation as a percentage.
This factor is used to calculate the effective speed setpoint limit r9733. The effective
speed setpoint limit is dependent on the selected SLS limit value p9531[x]. In contrast to
the parameterization of SLS limit values, r9733 specifies limits on the motor side, not
limits on the load side.
● SLS limit value
– r9733[0] = p9531[x] * p9533; x = selected SLS limit value
– r9733[1] = - p9531[x] * p9533; x = selected SLS limit value
r9733 is used, for example, for transmitting values to a higher-level control, which can
then, for example, adjust traversing speeds to the SLS levels. r9733 is a part of the
Safety Info Channel (SIC).