Mitsubishi Electric FR-A700 EC, Instruction Manual

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Parameter Selection and protection of a motor
FR-A700 EC 6 - 237
Operation method
Refer to section
6.12.3 to perform offline auto tuning.
Check that "3" or "103" (offline auto tuning completion) is set in Pr. 96 "Auto tuning setting/
status".
Set "1" (start-time online auto tuning) in Pr. 95 "Online auto tuning selection". Online auto
tuning is performed from the next starting.
Before starting operation, check that the following parameters have been set.
Press the RUN key of the operation panel or the FWD or REV key of the parameter unit
(FR-PU04/FR-PU07). For external operation, turn on the run command (STF or STR signal).
Magnetic flux observer (normal tuning, Pr. 95 = 2)
●
When exercising vector control using a motor with encoder, it is effective for torque accuracy
improvement.The current flowing in the motor and the inverter output voltage are used to
estimate/observe the magnetic flux in the motor.
The magnetic flux of the motor is always detected with high accuracy so that an excellent
characteristic is provided regardless of the change in the temperature of the secondary
resistance.
●
Vector control (Pr. 80, Pr. 81, Pr. 800) should be selected (refer to section 6-70).
Pr. Description
9 Used as rated motor current and electronic thermal relay parameters.
71 Applied motor
80
Motor capacity (down to one rank lower than the inverter capacity, note that the
capacity should be 0.4kW to 55kW)
81 Number of motor poles
Tab. 6-62: Related Parameters
NOTE For using start-time online auto tuning in elevator, examine the utilization of a brake
sequence for the brake opening timing at a start. Though the tuning ends in about a maxi-
mum of 500ms after a start, torque is not provided fully during that period.Therefore, note
that there may be a possibility of drop due to gravity. It is recommended to perform tuning
using a start time tuning signal (X28) (please refer also to page 6-237).
NOTE For the SF-JR (with encoder), SF-HR (with encoder), SF-JRCA (with encoder) or SF-HRCA
(with encoder), it is not necessary to perform offline auto tuning to select adaptive magnetic
flux observer. (Note that it is necessary to perform offline auto tuning (non-rotation mode) for
the wiring length resistance to be reflected on the control when the wiring length is long
(30m or longer as reference).