General Information For Setting The Commutation - Siemens Sinamics s120 Commissioning Manual

Check
Is the encoder correctly connected?
Are the digital and analog signals routed using separate cables?
Has the distance between the power cables and the signal lines been observed?
Is it guaranteed that temperature-sensitive parts (electric cables, electronic components) are not placed
on hot surfaces?
Have the line-side and motor-side power cables been dimensioned and routed in accordance with the
environmental and routing conditions?
Have the maximum permitted cable lengths between the frequency converter and the motor (depending
on the type of cables used) been observed?
3.18.3

General information for setting the commutation

You can use the following two pole position identification techniques for all frame sizes of
SIMOTICS T-1FW6 built-in torque motors:
● The motion-based technique
● The saturation-based technique (1st harmonic)
Note
Fine synchronization is recommended for precise commutation
Use either a measuring system with a zero mark that can be evaluated or an absolute
measuring system.
Motion-based technique
This technique can also be used during commissioning when the commutation angle offset is
initially determined or when it is checked in conjunction with an absolute measuring system
(e.g. RCN 85xx from Heidenhain).
The technique can be applied for vertical and horizontal axes whose load cannot be reduced
in an uncontrolled manner when the machine is disconnected from the power supply. In this
case, the axes must be able to be freely moved and not be braked. (static friction < 10% of
the rated motor torque).
In the worst-case scenario, the rotor can move in the range of ± 5 degrees when this
technique is used.
Danger to life from vertical or inclined axes
With vertical or inclined axes, the load can fall down and cause death or severe injury when
a motion-based technique is used.
• Ensure that nobody is in the danger zone.
• Use the saturation-based technique for vertical axes.
STARTER Commissioning Manual
Commissioning Manual, (IH1), 07/2016, 6SL3097-4AF00-0BP5
WARNING
3.18 Commissioning SIMOTICS T-1FW6 built-in torque motors
Commissioning
OK
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