Lenze i700 - Manual (Page 102)

5 Motor control & motor settings
5.10 Synchronous motor (SM): Pole position identification
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Lenze · i700 servo inverter · Reference manual · DMS 1.5 EN · 03/2014 · TD05
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5.10.4 Pole position identification PPI (without movement)
This function extension is available from version 01.03!
Functional description
After controller enable, a defined pulse pattern is output which provides currents up to
approximately maximum motor current. The respective currents are measured. Based on these
currents, the field distribution can be detected so that the pole position can be calculated.
Afterwards, the controller is inhibited automatically.
The pole position identification (without movement) does not require any further
parameterisation.
Subindex 5: PPI (min. movement): Max. move permitted
Adjustment of the permitted movement
• The pole position identification comprises a monitoring function for the follow-up control. If a movement
greater than the permissible movement set is detected by the encoder system, the pole position identification is
aborted and the error response parameterised is tripped:
• In order to detect a non-permissible blocking of the machine, a positive and negative test angle relative to the
current position are defined after the identification. The machine must align itself to these two test angles
within a tolerance of 25 %. The size of the test angle corresponds to the max. move permitted set here.
Setting range (min. value | unit | max. value) Lenze setting
1 ° 90 20 °
 Write access  CINH  OSC  P  RX  TX UNSIGNED_8
Subindex 6: PPI (min. movement): Absolute current amplitude
Display of the absolute current amplitude
Display area
(min. value | unit | max. value) Initialisation
0.00 A 42949672.95
 Write access  CINH  OSC  P  RX  TX Scaling: 1/100 UNSIGNED_32

Note!
Due to a slight inaccuracy in this PLI process, higher variations regarding the detected
pole position have to be expected. This also causes different torque efficiencies. Thus, we
recommend the use of higher-order PLI processes ("360 °" or "min. movement"). If this is
not possible for process reasons, we recommend the execution of the pole position
identification PLI (without movement) only after the controller is enabled for the first
time.  Optional settings (starting performance)
During the pole position identification, the error 0xFF13 ("identification cancelled") may
occur. This may be an indication that the motor features are not suitable for this PLI
process.