Mitsubishi Electric FR-A862 Instruction Manual page 52

2.9
Parameter settings for a motor with encoder
Parameter for the encoder (Pr.359, Pr.369, Pr.851, Pr.852)
• Set the encoder specifications.
Pr. Name
359 852 Encoder rotation
C141 C241 direction
369 851 Number of
C140 C240 encoder pulses
The parameters above can be set when a vector control compatible option is installed.
• The following table shows parameters to be set according to a vector control compatible option to be used.
Item
Encoder/Resolver rotation direction
Number of detector pulses
Parameter settings for the motor under vector control
Motor name
Standard motor
(thermal characteristic: standard)
Constant-torque motor
(thermal characteristic: constant
torque)
Vector control dedicated motor
Other manufacturer's standard
motor
Other manufacturer's constant-
torque motor

Offline auto tuning is required (Refer to the FR-A860 Instruction Manual (Detailed))

Set this parameter according to the motor.

Use the thermal protector input provided with the motor.
Initial Setting
value range
Set when using a motor for which forward
rotation (encoder) is clockwise (CW) viewed
0
from the shaft.
100
1
Set when using a motor for which forward
1 rotation (encoder) is counterclockwise (CCW)
viewed from the shaft.
101
Set the number of encoder pulses output.
1024 0 to 4096
Set the number of pulses before it is multiplied by 4.
FR-A8AP/FR-A8AL/
FR-A8APA
parameter
Pr.359
Pr.369 ― (fixed 1024 pulses)
Pr.9
Pr.71
Electronic
Applied
thermal O/L
motor
relay
Rated motor
0
current
Rated motor
1
current
0 30

Rated motor
0 (3)

current
Rated motor
1 (13)

current
Parameter settings for a motor with encoder
Description
CW
CCW
FR-A8APR FR-A8APS
parameter parameter
― (Obtained via
communication from
the encoder)
Pr.81
Pr.80
Number of
Motor
motor
capacity
poles
Motor Number of
capacity motor poles
Motor
4
capacity
Motor
4
capacity
Motor Number of
capacity motor poles
Motor Number of
capacity motor poles
INSTALLATION AND WIRING
Set for the operation at
120 Hz or less.
Set for the operation at a
frequency higher than
120 Hz.
Set for the operation at
120 Hz or less.
Set for the operation at a
frequency higher than
120 Hz.
FR-A8TP
parameter
Pr.852
Pr.851
Pr.359 Pr.369
Encoder Number of
rotation encoder
direction pulses
1 1024
1 1024
1 2048
 
 
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