Switching On The Motor When Sls Is Active - Siemens SINAMICS G120 Function Manual

Diagnostics of the safety functions
● Bit r9722.4 and bit 4 of the PROFIsafe status word 0 indicate whether load speed
● The yellow "SAFE" LED on the front of the Control Unit indicates that one of the safety
● When the "SAFE" LED flashes slowly, this indicates that one of the safety functions (in
2.6.3

Switching on the motor when SLS is active

In certain applications, the motor may only be switched on when SLS is active, for example,
when a machine operator runs a conveyor belt in the hazardous zone.
Since the safety functions are implemented without an encoder, the inverter does not have
any information on the current speed when the motor torque has been cut off. To switch on
the motor when the SLS safety function is active, you have to issue commands to the
inverter in a specific chronological order.
Dynamic response
● Activate SLS.
● Switch on the motor within 5 seconds (ON command).
Safety Integrated Function Manual, SINAMICS G120
Function Manual, 07/2010, FW 4.3.2, A5E03052391B AA
monitoring is active.
functions (in this case, SLS) has been enabled.
this case, SLS) is active.
Figure 2-8 Switching on the motor when SLS is active
Description
2.6 Safely Limited Speed, SLS
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