Siemens SINAMICS G115D Operating Instructions Manual page 251

Example
Examples
Setup mode: The machine operator must enter the dangerous
area of a machine and manually introduce material into a ma‐
chine part.
The maximum speed of a conveyor below should be safely limi‐
ted for personnel protection.
Further information
Expansion of the SLS function to include several SLS levels:
• The speed monitoring of the SLS function can be extended to include a maximum of 4
different SLS levels.
• The converter requires additional safety-related signals to select an SLS level and to signal
back which SLS level is active.
Figure 7-2
It is only possible to select SLS levels via PROFIsafe.
The switchover from a higher SLS level 2 to a lower SLS level 1 is described below.
Table 7-2
1. The converter signals "SLS level 2 is active" via the safe‐
2. The converter recognizes the selection of SLS level 1 via
3. SLS allows a motor to reduce its possibly inadmissibly
4. The converter monitors the absolute actual speed
SINAMICS G115D Wall Mounted distributed drive
Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA
SLS Level sign
Switching over from SLS level 2 to SLS level 1
Safely Limited Speed (SLS)
ty-related PROFIsafe communication.
secure PROFIsafe communication.
high speed within a defined time – or to reduce it along
a defined braking ramp.
against SLS level 1.
The converter signals "SLS level 1 is active" via secure
PROFIsafe communication.
7.16 Safely Limited Speed (SLS)
Possible solution
• Select SLS in the converter via PROFIsafe or use it always
active.
• The converter limits and monitors the speed of the ma‐
chine part.
Standard converter functions linked
with SLS
The converter limits the speed setpoint to
values below SLS level 2.
The converter limits the speed setpoint to
values below SLS level 1.
If the motor rotates faster than the SLS
monitoring value, then the converter
brakes the motor along the OFF3 ramp.
The converter limits the speed setpoint to
values below SLS level 1.
Advanced commissioning
249