Safety Integrated Functions
8.5 Safety Integrated Extended Functions
Function Manual
396 Function Manual, 01/2011, 6SL3097-4AB10-0BP3
8.5.10.2 Safe Direction without encoder
Function
Set p9306 = p9506 = 1 or p9506 = p9306 = 3 (factory setting = 0) to activate Safety
Integrated functions without encoder. You can also make this setting by selecting "Without
encoder" on the STARTER safety screen.
Differences between Safe Direction with encoder and Safe Direction without encoder
● For Safe Direction without encoder, after pulse suppression the drive is unable to
determine the current speed. For this operating state, the behavior is defined with the
parameters p9309.8/p9509.8:
– p9309.8 = p9509.8 = 1
The status signal displays "inactive".
– p9309.8 = p9509.8 = 0
The status signal displays "active", and the drive takes on the state STO.
● Due to the less precise position recognition, "Safe Direction without encoder" requires a
larger tolerance (p9364/p9564) compared with the function with encoder.
Note
A change in the direction of rotation using parameter p1821 is not recognized by "SDI
without encoder". For this reason, the limitation of SDI from r9733 no longer functions.
Restart after pulse suppression
If the drive has been switched off via OFF2/STO, the following steps need to be carried out
before a restart can be performed:
1st scenario:
● State after power-on: SDI selected, STO selected, OFF2 active
● Deselect STO.
● The drive enable must be given within 5 seconds via a positive edge at OFF1, otherwise
STO is reactivated.
2nd scenario
● Situation: Run until standstill with SDI selected, then OFF2 activated
● Select STO
● Deselect STO.
STO activated internally via OFF2: This activation must be undone by
selection/deselection.
● The drive enable must be given within 5 seconds via a positive edge at OFF1, otherwise
STO is reactivated.
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