Selection Of Control Method And Control Mode; Offline Auto Tuning - Mitsubishi Electric FR-A700 Manual

Pr.
Pr.
80, 81, 89, 451, 453, 454, 569, 800

Selection of control method and control mode

Pr.80 Motor capacity
Pr.89 Speed control gain (magnetic flux vector)
Pr.453 Second motor capacity
Pr.569 Second motor speed control gain
Advanced magnetic flux vector control can be selected by setting
the capacity and the number of motors to be used in Pr.80 and
Pr.81. When low speed torque and high accuracy and fast
response control are necessary, select real sensorless vector
control or vector control using Pr.800.
What is real sensorless vector control?
This function enables vector control with a general-purpose motor
without encoder.
What is vector control?
Speed control, torque control and position control can be performed
using a motor with encoder. (Plug-in option FR-A7AP is necessary.)
Parameter Setting
Number Range
0.4 to 55kW/0
to 3600kW
80
*1
453 9999
(initial value)
2, 4, 6, 8, 10
12, 14, 16,
81
18, 20
454
9999
(initial value)
0
1
2
3
4
5
800
451
*3
9
10
11
12
20
(initial value)
*1 The setting depends on the inverter capacity. (55K or less/75K or more)
*2 Use Pr.178 to Pr.189 to assign the terminals used for the X18 and MC
signal.
*3 Only "10 to 12, 20, 9999" can be set in Pr.451.
The motor speed fluctuation at load fluctuation can be adjusted using
Pr.89 (Pr.569) .
Control method of the second motor can be selected using the RT
signal.
The Pr.22 function is changed according to the Pr.800 setting (stall
prevention operation level/torque limit level).
55
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Magnetic flux Magnetic flux Magnetic flux Sensorless Sensorless Sensorless
Vector Vector Vector
Pr.81 Number of motor poles
Pr.451 Second motor control method selection
Pr.454 Number of second motor poles
Pr.800 Control method selection
Description
Set the applied motor capacity.
V/F control
Set the number of motor poles.
X18 signal -ON: Set 10 + number of
*2
V/F control motor poles.
V/F control
Speed control
Torque control
MC signal -ON:torque
*2
MC signal -OFF:speed
*2
Vector control
Position control
(FR-A7AP)
MC signal -ON:position
*2
MC signal -OFF:speed
*2
MC signal -ON:torque
*2
MC signal -OFF:position
*2
Vector control test operation
Test operation of vector control can be performed
without connecting a motor.
Speed control
Real sensorless
Torque control
vector control
MC signal -ON:torque
*2
MC signal -OFF:speed
*2
V/F control
(advanced magnetic flux vector control)
Pr.
Pr.
82 to 84, 90 to 94, 96, 455 to 463, 684, 859, 860

Offline auto tuning

Magnetic flux Magnetic flux Magnetic flux
Pr.82 Motor excitation current
Pr.84 Rated motor frequency
Pr.91 Motor constant (R2)
Pr.93 Motor constant (L2)
Pr.96 Auto tuning setting/status
Pr.456 Rated second motor voltage
Pr.458 Second motor constant (R1)
Pr.460 Second motor constant (L1)
Pr.462 Second motor constant (X)
Pr.684 Tuning data unit switchover
Pr.860 Second motor torque current
Offline auto tuning operation for automatic calculation of motor
constants can be executed when using advanced magnetic flux
vector control, real sensorless vector control and vector control.
Both offline and online tuning are necessary when using real
sensorless vector control.
You can copy the online tuning data (motor constants) to another
inverter using the PU (FR-DU07/FR-PU07).
Even when motors (other manufacturer's motor, SF-JRC, etc.) other
than Mitsubishi standard motor (SF-JR SF-HR 0.4kW or more),
Mitsubishi constant-torque motor (SF-JRCA SF-HRCA 200V class
four-pole 0.4kW to 55kW) and Mitsubishi vector control dedicated
motor (SF-V5RU) are used or the wiring length is long, using the
offline auto tuning function runs the motor with the optimum
operating characteristics.
Offline auto tuning conditions
⋅
A motor should be connected.
⋅ The motor capacity is equall to or one rank lower than the
inverter capacity. (note that the capacity is 0.4kW or more)
⋅ The maximum frequency is 120Hz.
⋅
A high-slip motor, high-speed motor and special motor
cannot be tuned.
Note the following when "101" (offline auto tuning performed with
motor running) is set in Pr.96 (Pr.463) .
1) Torque is not enough during tuning.
2) The motor may be run at nearly its rated frequency (Pr. 84
setting) without any problem.
3) The brake should be open.
4) No external force is applied to rotate the motor.
Even if "1" (tuning performed without motor running) is set in Pr.96
(Pr.463), 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.
* This instruction must be followed especially in elevator.
Note that if the motor runs slightly, tuning performance is
unaffected.
Pr.
Pr.
89
Refer to the section about Pr. 80.
Sensorless Sensorless Sensorless
Vector Vector Vector
Pr.83 Motor rated voltage
Pr.90 Motor constant (R1)
Pr.92 Motor constant (L1)
Pr.94 Motor constant (X)
Pr.455 Second motor excitation current
Pr.457 Rated second motor frequency
Pr.459 Second motor constant (R2)
Pr.461 Second motor constant (L2)
Pr.463 Second motor auto tuning setting/status
Pr.859 Torque current