Technical data
Safety Integrated Functions
8.5 Safety Integrated Extended Functions
Function Manual
406 Function Manual, 06/2012, 6SL3097-4AB10-0BP4
8.5.13 Safe actual value acquisition
8.5.13.1 Reliable actual value acquisition with the encoder system
Supported encoder systems
The Safety Functions used to monitor motion (e.g. SS1, SS2, SOS, SLS and SSM) require
reliable actual value acquisition.
For safe speed/position sensing for SINAMICS S110, only a single-encoder system may be
used.
Single-encoder system
Encoders within single-encoder systems are used to generate the failsafe actual values of
the drive. This motor encoder must be appropriately qualified (see encoder types). The
safety-relevant actual values are generated either directly in the encoder or in the Sensor
Module and are transferred to the Control Unit by way of failsafe communication via DRIVE-
CLiQ.
For motors without a DRIVE-CLiQ interface, the connection is established by means of
additional Sensor Modules (SMC or SME).
NOTICE
When specifying the standstill tolerance window, you must remember that fail-safe position
monitoring can take place with a maximum of the precision displayed in r9731.
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Figure 8-15 Example of a single-encoder system