Lenze I95AE240F User Manual

12.4.3 Pole
posion idencaon (PPI) with minimum movement
DANGER!
Mechanical damage of the motor caused by hanging loads!
The mot
or may be permanently damaged.
▶
The motor must not be braked or blocked during the pole posion idencaon. Thus, this
funcon must not be used for hanging loads!
NOTICE
Thermal overload of the motor!
The mot
or may be permanently damaged.
▶
Before execung the pole posion idencaon, check that the following monitoring sys-
tems are parameterised correctly in order to prevent a permanent damage of the motor in
the event of an error:
▶
4Motor overload monitoring (i²*t) ^ 264
▶
Overcurrent monitoring
Funconal
descripon
If servo control for synchronous motor is set and if no error is pending, the current posion is
memorised aer controller enable, and the current is increased along a ramp for 10 s to 35 %
of the rated motor current. This will cause the rotor to align, which, however, is compensated
by a posion control. If the rotor makes an electrical movement of more than 20°, an error
message is output, and the value measured is discarded. This might occur in the case of
motors with considerable detent torques.
If the current has reached its nal value, a plausibility check is executed aer a short interval:
in order to detect a non-permissible blocking of the motor, a posive and a negave test angle
(± 20°) relave to the current posion are dened aer the idencaon. The motor must
align itself to these two test angles within a tolerance of 25 %.
Condions for the execuon
•
The mot
or must not be braked or blocked during the pole posion idencaon.
•
The servo inverter is error-free and in Switched on device state.
Response of the motor during performance
The
moon of the motor will maximally correspond to the set "Max. permissible moon"
(Lenze seng: 20°). If a greater moon is detected via the encoder system, the pole posion
idencaon is cancelled and the parameterised error response (Lenze seng: Fault) is trig-
gered.
How to execute the pole posion idencaon PLI (min. movement):
1.
If the ser
vo inverter is enabled, disable it.Enable operaon
2.
Se
t the object 0x2825 to "6" to change to the "pole posion idencaon PLI (min. move-
men
t)" operang mode.
3.
Enable the servo inverter to start the process.
Note: Inhibing the controller serves to abort the started procedure any me if required
without changing the sengs.
Conguring the feedback system
Synchronous motor: Pole posion idencaon (PPI)
Pole posion idencaon (PPI) with minimum movement
207

Lenze I95AE240F Specifications

General

Brand	Lenze
Model	I95AE240F
Category	Inverter
Language	English