Lenze i950 Series, Manual

Page: 232 / 500

After the pole position identification has been completed successfully...
...the controller is inhibited automatically and the pole position determined for the activated
feedback system is set in the 0x2C03:002 object.
•
Save the changed settings.
The »EASY Starter« serves to save the parameter settings of the servo inverter as parame-
ter file (*.gdc). This file can then be imported in the »PLC Designer«. Saving the parameter
settings
•
The inverter disable set automatically by the procedure can be deactivated again via the
CiA402 control word 0x6040 . Enable operation
Adapt pole position identification PLI (min. movement)
The process of pole position identification described above can be adapted to the respective
machine and the existing moments of inertia by using the parameters described in the follow-
ing.
NOTICE
Thermal overload of the motor!
The motor may be permanently damaged.
▶
If no temperature monitoring is available in the motor, and/or the I²xt motor monitoring
and the maximum current monitoring are not parameterised correctly, the motor can be
permanently damaged if the current amplitude is set too high!
▶
Motor overload monitoring (i²*t)
▶
Overcurrent monitoring
Parameter
Address Name / setting range / [default setting] Info
0x2C62:001 Pole position identification (min. movement) settings:
Current amplitude
1 ... [25] ... 1000 %
•
Setting can only be changed if the inverter is inhibi-
ted.
Percentage adaptation of the current amplitude.
•
For large machines, high mass inertia values or for linear direct drives,
the current amplitude usually must be increased.
•
Default setting 25 % ≡ 35 % of Motor rated current ( 0x6075 )
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.
0x2C62:002 Pole position identification (min. movement) settings:
Ramp time
1 ... [10] ... 600 s
•
Setting can only be changed if the inverter is inhibi-
ted.
Percentage adaptation of the rate of current rise.
0x2C62:003 Pole position identification (min. movement) settings:
Gain
0 ... [0] ... 1000 % Adaptation of the proportional PI controller gain.
With the Lenze setting "0 %",the PI controller works as an I controller.
0x2C62:004 Pole position identification (min. movement) settings:
Reset time
0.1 ... [62.5] ... 6000.0 ms Adaptation of the reset time of the PI controller.
•
In order to be able to compensate a positional variation faster, first
the reset time should be reduced. If this does not result in the desired
behaviour, the proportional gain can be increased.
•
Ensure that the position control does not get unstable. We therefore
recommend you to use an I controller.
0x2C62:005 Pole position identification (min. movement) settings:
Max. move permitted
1 ... [20] ... 90 ° Adaptation 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 trip-
ped:
•
In order to detect a non-permissible blocking of the machine, a posi-
tive 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.
Configuring the feedback system
Synchronous motor: Pole position identification (PPI)
Pole position identification (PPI) with minimum movement
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