Mitsubishi FR-A721-11K Instruction Manual page 77

Before operation
<Selection method of 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 simple position feed by contact input, position control by inverter simple pulse input,
and position control by FR-A7AL pulse train input.
Perform secure wiring. (Refer to page 32.)
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 66.)
Selection of position command source. (Pr. 419)
Position command by contact
input
Set "0" (initial value) in Pr. 419.
Setting of parameter for position feed
(Pr. 465 to Pr. 494).
(Refer to Chapter 4 of
Manual (Applied).)
As required
· Set the electronic gear. (refer to Chapter 4 of
· Setting of positioning adjustment parameter (refer to Chapter 4 of
(Applied))
· Gain adjustment of position control (refer to Chapter 4 of
CAUTION
⋅ The carrier frequencies are selectable among 2k, 6k, 10k, and 14kHz for vector control.
70
Mount the FR-A7AP/FR-A7AL (option).
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 33.)
(Pr. 80, Pr. 81) (Refer to page 66.)
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.
Selection of command pulse form.
the Instruction (Refer to Chapter 4 of
Instruction Manual (Applied).)
Test run
Position command by
inverter pulse train input
Set "2" in Pr. 419.
(Pr. 428)
the
the Instruction Manual (Applied))
the Instruction Manual (Applied))
Position command from the
positioning module of the
programmable controller
system (through FR-A7AL)
Set Pr. 419 = "1"
Refer to the Instruction Manual of
FR-A7AL.
the Instruction Manual