Siemens SINUMERIK MC Commissioning Manual page 143

Configuring the limits
● The speed limits for Safely-Limited Speed without encoder are configured in exactly the
same way as described for Safely-Limited Speed with encoder.
● Only STOP A and STOP B may be configured as stop responses for "Safely-Limited Speed"
(SLS) without encoder.
Restart after OFF2/STO
If the drive has been switched off via STO, the following steps need to be carried out before a
restart can be performed:
1. Case
2. Case
3. Case
4. Case
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB
● State after switching on
● SLS selected
● STO selected
● Pulse suppression active
● Deselect STO
● The drive enable must be issued within 5 seconds via a positive edge at OFF1, otherwise
STO is reactivated.
● Situation
● Traversing to standstill with SLS selected
● OFF1 is initiated, pulse cancellation becomes active (internal selection
STO)
● Select STO
● Deselect STO
STO activated internally via pulse suppression: This activation must be undone by se‐
lection/deselection.
● The drive enable must be issued within 5 seconds via a positive edge at OFF1, otherwise
STO is reactivated.
● Situation
● Traversing to standstill with SLS selected
● OFF1 is initiated, pulse cancellation becomes active (internal selection
STO)
● Deselect SLS
STO activated internally via pulse suppression: This activation must be undone by se‐
lecting/deselecting SLS.
● Select SLS
The drive enable must be issued within 5 seconds via a positive edge at OFF1, otherwise
STO is reactivated.
● Situation
● All Safety Integrated functions are deselected.
● After this the drive enable must be given by a positive edge at OFF1.
● In this case, the motor is not started safely.
Safety functions integrated in the drive
4.10 SLS
143