Filter
Top Products
139
Operation selection at power failure and instantaneous power failure
4
PARAMETERS
(5) Frequency search gain (Pr. 298), offline auto tuning (Pr. 96)
When automatic restart after instantaneous power failure operation (with frequency search) is valid at V/F control, perform
offline auto tuning.
Perform offline auto tuning during V/F control in the following order to set Pr. 298 Frequency search gain automatically.
(Refer to page 105 during General-purpose magnetic flux vector control.)
Before performing offline auto tuning
Check the following before performing offline auto tuning.
The inverter is under V/F control
A motor should be connected. Note that the motor should be at a stop at a tuning start.
The motor capacity should be equal to or one rank lower than the inverter capacity. (note that the capacity is 0.1kW or
more)
The maximum frequency is 120Hz.
A high-slip motor, high-speed motor and special motor cannot be tuned.
The motor may run slightly.
Therefore, fix the motor securely with a mechanical brake, or before tuning, make sure that
there will be no problem in safety if the motor runs (caution is required especially in vertical lift applications). Note that
tuning performance is unaffected even if the motor runs slightly.
Offline auto tuning will not be performed properly if it is performed with a surge voltage suppression filter (FR-ASFH, FR-
BMF-H) connected between the inverter and motor. Remove it before starting tuning.
Setting
1) Set "21" in Pr. 96 Auto tuning setting/status.
Tuning is performed without motor running.
2) Set the rated motor current (initial value is rated inverter current) in Pr. 9 Electronic thermal O/L relay. (Refer to page 100)
3) Set Pr. 71 Applied motor according to the motor used.
∗1 Refer to page 103, for other settings of Pr. 71.
Motor Pr.71 Setting ∗1
Mitsubishi standard motor
Mitsubishi high efficiency motor
SF-JR 3
SF-JR 4P 1.5kW or less 23
SF-HR 43
Others 3
Mitsubishi constant-torque
motor
SF-JRCA 4P 13
SF-HRCA 53
Others (SF-JRC, etc.) 13
Other manufacturer's standard
motor
—3
Other manufacturer's constant-
torque motor
—13