Mitsubishi Electric FR-A862-E Instruction Manual page 53

Parameter settings for a motor with encoder
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.
359 852 Encoder rotation
C141 C241 direction
369 851 Number of encoder
C140 C240 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.
52
INSTALLATION AND WIRING
Initial
Name
value
1
1024
FR-A8AP/FR-A8AL
/FR-A8APA
parameter
Pr.359
Pr.369
Pr.9
Electronic
thermal O/L
relay
Rated motor
0
current
Rated motor
1
current
0 30

Rated motor
0 (3)
current
Rated motor
1 (13)
current
Setting
range
Set when using a motor for which
forward rotation (encoder) is clockwise
0
(CW) viewed from the shaft.
100
Set when using a motor for which
forward rotation (encoder) is
1
counterclockwise (CCW) viewed from
the shaft.
101
Set the number of encoder pulses output.
0 to 4096
Set the number of pulses before it is multiplied by 4.
FR-A8APR
parameter
― (fixed 1024 pulses)
Pr.71 Pr.80
Applied Motor
motor capacity
Motor capacity
Motor capacity
Motor capacity
Motor capacity

Motor capacity

Description
Set for the operation at
120 Hz or less.
Set for the operation at a
CW
frequency higher than
120 Hz.
Set for the operation at
120 Hz or less.
Set for the operation at a
CCW
frequency higher than
120 Hz.
FR-A8APS
parameter
Pr.852
― (Obtained via
communication from Pr.851
the encoder)
Pr.359/
Pr.81 Pr.852
Number of Encoder
motor poles rotation
direction
Number of
1
motor poles
4 1
4 1
Number of

motor poles
Number of

motor poles
FR-A8TP
parameter
Pr.369/
Pr.851
Number of
encoder
pulses
1024
1024
2048

