Mitsubishi Electric FR-A700 Series Instruction Manual page 62

<Selection method of real sensorless vector control (speed control)>
Speed control is exercised to match the speed command and actual motor speed.
Setting procedure
Perform secure wiring. (Refer to page 8.)
Set the motor. (Pr. 71) (Refer to page 55.)
Set the motor capacity and the number of motor poles according as required.
Select a control method. (Refer to page 55.)
Set the run command. (Refer to page 73.)
(Refer to
Perform offline auto tuning. (Pr. 96) (Refer to page 63.)
As required
· Select online auto tuning. (Pr. 95) (refer to page 67.)
· Easy gain tuning (refer to page 68).
· Manual input speed control gain adjustment (refer to page 70).
CAUTION
· Make sure to perform offline auto tuning before performing real sensorless vector control.
· The carrier frequencies are selectable from among 2k, 6k, 10k, 14kHz for real sensorless vector control.
· Torque control can not be performed in the low speed region and at a low speed with light load. Choose vector control.
· Performing pre-excitation (LX signal and X13 signal) under torque control may start the motor running at a low speed even
when the start command (STF or STR) is not input. The motor may run also at a low speed when the speed limit value=0 with a
start command input. Perform pre-excitation after making sure that there will be no problem in safety if the motor runs.
· Do not switch between the STF (forward rotation command) and STR (reverse rotation command) during operation under
torque control. Overcurrent shut-off error (E.OC ) or opposite rotation deceleration error (E.11) occurs.
· For the 0.4K to 3.7K, the speed deviation may become large at 20Hz or less and torque may become insufficient in the low
speed region under 1Hz during continuous operation under real sensorless vector control. In such case, stop operation once
and reaccelerate to improve the problems.
· When the inverter is likely to start during motor coasting under real sensorless vector control, set to make frequency search of
automatic restart after instantaneous power failure valid (Pr. 57 ≠ "9999", Pr. 162 = "10").
Set "3" (standard motor) or "13" (constant torque motor) in Pr. 71
Applied motor.
(Pr. 80, Pr. 81) (Refer to page 55.)
Set the motor capacity (kW) in Pr. 80 Motor capacity and set the number
of motor poles (number of poles) in Pr. 81 Number of motor poles. (V/F
control is performed when the setting is "9999" (initial value).
Make speed control valid by selecting "10" (speed control) or "12"
(speed-torque switchover) for Pr. 800.
Select the start command and speed command.
(1) Start command
1) Operation panel: Setting by pressing
2) External command: Setting by forward rotation or reverse
(2)Speed command
1) Operation panel: Setting by pressing
2) External analog command (terminal 2 or 4) :
3) Multi-speed command:
Set the torque limit. (Pr. 810)
Instruction Manual (applied).)
Test run
operation panel
rotation command (terminal STF or STR)
Give a speed command using the analog signal input to
terminal 2 (or terminal 4).
The external signals (RH, RM, RL) may also be used to give
speed command.
Before operation
/ of the
of the operation panel
57
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