Commissioning
4.10 Safety Integrated commissioning
Commissioning with Startdrive
Commissioning Manual, 11/2017, 6SL3097-4AA10-0BP1
231
Extended functions
4.10.4.1
The Safety Integrated extended functions SS1, SLS, SDI and SSM without encoder do not
require safe speed actual value acquisition. If an encoder is used for the drive control, this
has no influence on the sensorless safety functions. They can be used with induction motors
in all control modes, as well as with SIEMOSYN synchronous motors with V/f control.
Note
The slip of an induction motor must be taken into account
For Safety Integrated extended functions without encoder (de
pending on the drive load), as
a result of slip for induction motors (deviations between electrical and mechanical speed),
deviations can occur between the safely determined electrical speed and the mechanical
speed on the motor shaft.
The Safety Integrated extended functions without encoder are also permissible for group
drives (several motors connected to one power unit).
Impermissible operating modes for Safety Integrated extended functions without encoder
The following are impermissible:
● Current controller cycles 31.25 µs and 62.5 μs (for Double Motor Modules with two
configured safety drives).
● For the independent setting of current controller cycle and pulse frequency in conjunction
with safety without encoder, the following system cycles:
– Double Motor Module: < 125 μs
– All other components: < 62.5 μs
– p9589 must be set = 3300 to allow the current controller cycle and pulse frequency to
be independently set.
● Shaft generator functionality
● Induction motors up to 1000 kW
On very large machines, it may also be necessary to adjust the parameter p9585.
Critical operating modes for Safety Integrated extended functions without encoder
When the safety functions are deactivated, the following technology functions are not
negatively influenced.
When using the following operating modes with the Safety Integrated extended functions
activated without encoder, this can result in faults in the encoderless safe actual value
acquisition (see messages C01711, C30711 with fault values 1040 ff.).
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