Pentax IPFC 109, Operating Manual

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The calibration process can take up to one minute. Wait until it has completed.
The calibration process must be performed during the final electrical configuration of the system,
i.e. with the motor, the cable and any filter applied.
If there is any variation of the motor, cable or filter applied, it is necessary to repeat the
calibration process by accessing the motor parameters menu (default password 002).
An incorrect configuration of the motor's rated voltage, frequency or current will lead to
erroneous results in the calibration process and therefore to a malfunctioning of the motor.
Setting the rated motor current higher than the tag value can seriously damage both the motor
and the inverter.
During calibration the motor coils are heated by the test current. If the motor is self-ventilated the
absence of motor rotation does not allow the heat to be dispersed by force.
It is therefore recommended to allow the motor to cool between one calibration and the next.
If the calibration process is not successful, it is necessary to check:

The connections between the inverter and the load (including any motor filters in between).

The rated voltage, frequency and current values set.
The motor cannot be started until the calibration process has been completed.
If the calibration process cannot be completed, it is possible to manually enter the parameters or
stator resistance (Rs) and stator inductance (Ls) in the motor parameters menu (default password
002).
These data can be provided by the motor manufacturer or obtained through measurements.
If you do not have these data and the self calibration process is not successful, it is recommended
to contact technical assistance.
Adjustment of the FOC control
The FOC control algorithm checks current (torque) and speed with defined response dynamics.
The FOC dynamic is set by default to a value sufficient to guarantee precise and oscillation-free control in most applications.
In some cases, however, it may be necessary to increase (if there are frequency oscillations) or to lower (in the event of
overcurrent or igbt trip alarms) the "FOC dynamic" setting in the motor parameters menu (default password 002) according
to the following table :
CONFIGURATION FOC DYNAMIC
Motor cables shorter than 100 m and no filter between inverter and motor. 200
Motor cables shorter than 100 m and a dV/dt filter between the inverter and the motor. 150
Motor cables longer than 100 m and a dV/dt filter between the inverter and the motor. 100
Presence of a sinusoidal filter between the inverter and the motor. 50
The incorrect setting of the FOC dynamic can cause:

Speed oscillations if the FOC dynamic is too slow.

Overcurrent or igbt trip alarms if the FOC dynamic is too fast.
It is recommended to intervene promptly by appropriately adjusting the "FOC Dynamic"
parameter if the conditions listed above are present.
Lack of intervention could lead to damage to the inverter, the motor and the system.