Lenze i700 - Manual (Page 98)

5 Motor control & motor settings
5.10 Synchronous motor (SM): Pole position identification
98
Lenze · i700 servo inverter · Reference manual · DMS 1.5 EN · 03/2014 · TD05
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
0x2C61 | 0x3461 - Pole position identification PPI (360°)
Sub. Name Lenze setting Data type
 1 PPI (360°): Current amplitude 100 % UNSIGNED_16
 2 PPI (360°): Ramp time 40 s UNSIGNED_16
 3 PPI (360°): Direction of rotation 0: Field: CW UNSIGNED_8
 4 PPI (360°): Error tolerance 20 ° UNSIGNED_8
 5 PPI (360°): Absolute current amplitude UNSIGNED_32
Subindex 1: PPI (360°): Current amplitude
Adjustment of the current amplitude in percent
• For large machines and high mass inertia values or for linear direct drives, the current amplitude usually has to
be increased.
• A Lenze setting of "100 %" corresponds to 141 % of the rated motor current ( 0x6075 or 0x6875 for axis B).
Note!
If the current amplitude is set to > 100 %, the device utilisation (Ixt) monitoring and/or one of the motor monitoring
functions may respond and cause the abort of the pole position identification.
Setting range
(min. value | unit | max. value) Lenze setting
1 % 1000 100 %
 Write access  CINH  OSC  P  RX  TX UNSIGNED_16
Subindex 2: PPI (360°): Ramp time
Adjustment of the ramp time in percent
• For large machines and high mass inertia values, the ramp time usually has to be increased.
• For small machines, a reduction of the ramp time can speed up the pole position identification process.
Setting range (min. value | unit | max. value) Lenze setting
1 s 600 40 s
 Write access  CINH  OSC  P  RX  TX UNSIGNED_16
Subindex 3: PPI (360°): Direction of rotation
Selection of the travel direction
• In some situations it may be helpful to reverse the travel direction for the pole position identification (e.g. for
linear motor at the end stop).
Selection list (Lenze setting printed in bold)
0 Field: CW
1 Field: CCW
 Write access  CINH  OSC  P  RX  TX UNSIGNED_8
Subindex 4: PPI (360°): Error tolerance
Error tolerance for the plausibility check
• If the rotor position detected via the encoder system is not within the tolerance zone around the position that is
output in a controlled manner, the pole position identification is aborted and the error response parameterised
is tripped.
• When optimising the pole position identification by means of the objects listed before, it may be sensible to first
increase the tolerance zone in order to evaluate the entire throughput based on an oscislloscope recording. This
is especially required in case of mechanically coupled motors, as here, the preset tolerance zone is quickly
exceeded due to the feedbacks of mass inertia, friction and static friction. After the deviations with iteratively
optimised PPI behaviour are in the common tolerance zone again, the value can/has to be reduced to 20 ° again.
Setting range (min. value | unit | max. value) Lenze setting
15 ° 50 20 °
 Write access  CINH  OSC  P  RX  TX UNSIGNED_8