Function modules
8.10 Parallel connection of power units
Drive functions
572 Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Conditions for switching in an auxiliary drive
The secondary conditions for connecting an additional drive object as auxiliary drive to a
parallel connection are:
● Only power units of the same type and the same power rating may be connected together
in parallel.
● Up to 4 Line Modules and up to 4 Motor Modules can be connected together in parallel.
● All the Power Modules operate on a common DC link.
● Due to the different cycle times, Line Modules and Motor Modules must be connected to
separate DRIVE-CLiQ sockets. Mixed operation at one DRIVE-CLiQ socket results in a
malfunction.
● Parameter p9620 (signal source for STO/SBC/SS1) of the DOs of all Motor Modules must
be interconnected in the same way.
● Automatic commissioning of the additional drive object is not possible.
● The additional drive object must be created offline and then transferred online to the
drive.
● The additional drive object must be connected to a separate DRIVE-CLiQ socket.
● The maximum power of the auxiliary drive must be selected so that the maximum power
of all the Motor Modules incl. the additional drive - does not exceed the total power rating
of the parallel Line Modules.
● Existing supplementary conditions and the resulting logic operations and monitoring
functions must be adapted to the new requirements.
Creating a project with the appropriate topology
The required topology can be created using either the STARTER or SCOUT tool:
● The project is always created offline.
● The Control Unit combines parallel-connected power units to form a large Line Module or
Motor Module.
● The auxiliary drive is assigned a separate DRIVE-CLiQ line.
● The DRIVE-CLiQ connections must be implemented corresponding to the topology that
has been created
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