Position Control By Vector Control; Position Control - Mitsubishi Electric FR-A740-00023 Instruction Manual

Position control by vector control

4.6 Position control by vector control

Purpose
Conditional position control by
parameter setting
Position control by pulse train input
of the inverter
Adjust the gear ratio of motor and
machine
Setting of positioning adjustment
parameter
Improve position control accuracy
4.6.1

Position control

In the position control, the speed command is calculated so that the difference between command pulse (or
parameter setting) and the number of feedback pulses from the encoder is zero to run the motor.
This inverter can perform conditional position feed by contact input and position control by inverter conditional
pulse input.
(1) Setting procedure
Perform secure wiring. (Refer to page 35.)
Set the motor and encoder. (Pr. 71, Pr. 359, Pr. 369)
Set the motor capacity and the number of motor poles.
Select a control method. (Refer to page
Selection of position command source. (Pr. 419)
Setting of parameter for position feed
(Pr. 465 to Pr. 494).
(Refer to page 126.)
As required
· Set the electronic gear. (refer to page 131)
· Setting of positioning adjustment parameter (refer to page 132)
· Gain adjustment of position control (refer to page 133)
CAUTION
⋅ The carrier frequencies are selectable from among 2k, 6k, 10k, 14kHz for vector control.
(2k and 6kHz for the 02160 or more)
124
Position command by
parameter
Position command by
conditional pulse train
Setting the electronic
gear
In-position width
Excessive level error
Gain adjustment of

position control

Vector Vector Vector
Mount the FR-A7AP.
Set Pr. 71 Applied motor, Pr. 359 Encoder rotation direction and Pr. 369
Number of encoder pulses according to the motor and encoder used.
(Refer to page 36.)
(Pr. 80, Pr. 81) (Refer to page
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 "3" (position control) "4" (speed-
position switchover) or "5" (position-torque switchover) for Pr. 800.
Position command by contact input
Set "0" (initial value) in Pr. 419.
Test run
Parameter that must be Set
Pr. 419, Pr. 464 to Pr. 494
Pr. 419, Pr. 428 to Pr. 430
Pr. 420, Pr. 421, Pr. 424
Pr. 426, Pr. 427
Pr. 422, Pr. 423, Pr. 425
.)
87
.)
87
Position command by inverter pulse train input
Set "2" in Pr. 419.
Selection of command pulse form.
(Pr. 428)
(Refer to page 129.)
Refer to Page
126
129
131
132
133