Lenze i700 - Manual (Page 96)

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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5.10.1 Monitoring of the pole position identification
If an error occurs during the pole position identification or the pulse inhibit gets active (e.g. due to
short-time undervoltage), the procedure is terminated with controller inhibit without a change in
settings.
If the motor was braked or blocked during the procedure, this will be recognised at the end of the
measurement and no change is made either (exception: "Pole position identification PLI (without
motion").
The error response can be parameterised:
0x2C60 | 0x3460 - Monitoring of pole position identification: Response
5.10.2 Pole position identification PPI (360°)
Functional description
If servo control for synchronous motor is set and if no error is pending, the current is increased to
141 % of the rated motor current along a ramp first after controller enable. The rotor thus provides
the necessary basis for further proceeding.
The commutation angle is changed (for 2 s) from 45° to 0° along a ramp. This brings the rotor
reliably into a defined position. Afterwards, the commutation angle is changed from 0° to 360°
along a ramp, passing through approximately 45° every 4 s. Thus, the motor carries out a complete
electrical revolution, resulting in a mechanical rotation of the motor shaft in positive direction
(clockwise when looking at the A-side of the motor). Within the 360° several measurements are
carried out and evaluated.
If the pole position identification is aborted, the response set here is triggered.
• If this behaviour is not wanted, deactivate the monitoring by selecting "0: No response".
Selection list (Lenze setting printed in bold)
0 No response
1 Fault
2 Warning
 Write access  CINH  OSC  P  RX  TX UNSIGNED_8

Danger!
The motor must not be braked or blocked during the pole position identification! For this
reason, this function is not permitted for hanging loads!

Stop!
Check the correct parameterisation of the followng monitoring modes before carrying
out the pole position identification to prevent the motor from being permanently
damaged in the event of an error:
• Monitoring of the motor utilisation (I²xt) ( 241)
• Monitoring of the ultimate motor current ( 258)