Commissioning: Linear Motor With Several Identical Primary Sections - Siemens SINAMICS S120 Commissioning Manual

2.13.3

Commissioning: Linear motor with several identical primary sections

General information
If you are sure that the EMF of more than one motor has the same relative phase position to
another, the connecting cables can be connected in parallel and operated from one Motor
Module.
Linear motors connected in parallel are commissioned based on the commissioning of a
single linear motor. To activate the parallel connection of linear motors, in the window
"Configuration - SINAMICS_S120_CU320 - 2nd motor" set a check mark for "Parallel motor
connection".
The number of primary sections connected in parallel is entered in the "Motor" screen form
(p0306) when the drive is configured in STARTER.
The linear motors are connected individually in sequence to the drive, and are commissioned
as a single motor (1FNx ...). The angular commutation offset is automatically determined and
noted for each motor. Finally, the measured angular commutation offset of the motors are
compared with each other.
If the difference between the angular commutation offset is less than 5 degrees (electrical),
all the motors can be connected to the drive in parallel and commissioned as a parallel
configuration of n linear motors (e.g. 2 • 1FN3xxx).
Permitted parallel connection
Only linear motors that fulfill the following preconditions may be connected in parallel:
● Identical primary section size
● Identical winding type
● Identical air gap
Note
If linear motors in an axis are connected in parallel, the position of the primary sections with
respect to one another and to the secondary sections must exhibit a specific grid, in order to
achieve a matching electrical phase position.
For more information see: Configuration Manual for Linear Motors 1FN3 or 1FN6
Commissioning Manual
Commissioning Manual, (IH1), 01/2011, 6SL3097-4AF00-0BP1
2.13 Commissioning linear motors (servo)
Commissioning
137