Siemens SINAMICS S120 Commissioning Manual page 161

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 additional information, refer to the Configuration Manual of the 1FN1, 1FN3 or 1FN6
linear motors.
Temperature sensors and electrical wiring
The temperature sensors can be evaluated, for example, as follows:
● Temperature sensor
● Temperature switch
See also: Configuration Manual for Linear Motors 1FN3 or 1FN6
When connecting-up the temperature monitoring circuits, carefully observe the
requirements regarding protective separation in accordance with EN 61800-5-1.
For additional information, refer to the Configuration Manual of the 1FN1, 1FN3 or 1FN6
linear motors.
Commissioning Manual
Commissioning Manual, (IH1), 01/2012, 6SL3097-4AF00-0BP2
– Motor 1: Connection via SME12x and evaluation via the drive control
– Motor n: not connected
(short-circuited and connected to the PE)
– Motor 1 to n: Evaluation via the drive control
WARNING
2.13 Commissioning linear motors (servo)
Commissioning
159