Initial Setting - Mitsubishi Electric FR-A720-0.4K Instruction Manual

Connection of motor with encoder (vector control)
(6) Instructions for encoder cable wiring
• Use twisted pair shield cables (0.2mm
PG and SD should be connected in paralell or be larger in size according to the cable length.
To protect the cables from noise, run them away from any source of noise (e.g. the main circuit and power supply
voltage).
Wiring Length
Within 10m
Within 20m
Within 100m *
* When differential line driver is set and a wiring length is 30m or more
The wiring length can be extended to 100m by slightly increasing the power by 5V (approx. 5.5V) using six or more cables with gauge size of 0.2mm
in parallel or a cable with gauge size of 1.25mm
• To reduce noise of the encoder cable, earth (ground) the encoder
shielded cable to the enclosure (as near as the inverter) with a P clip or
U clip made of metal.
REMARKS
· For details of the optional encoder dedicated cable (FR-JCBL/FR-V7CBL), refer
to page 37.
· The FR-V7CBL is provided with a P clip for earthing (grounding) shielded cable.
(7) Parameter for encoder (Pr. 359, Pr. 369)
Parameter
Name
Number
Encoder rotation
359
direction
Number of encoder
369
pulses
The above parameters can be set when the FR-A7AP (option) is mounted.
(8) Motor for vector control and parameter setting
Motor Name
SF-JR
SF-JR 4P 1.5kW
Mitsubishi standard
or less
motor
SF-HR
Others
SF-JRCA 4P
Mitsubishi constant-
SF-HRCA 4P
torque motor
Others
Mitsubishi vector SF-V5RU
control dedicated
(1500r/min series)
motor
SF-THY
Other manufacturer's
standard motor
Other manufacturer's
constant torque motor
Values in the bolded frame are initial values.
*1 Offline auto tuning is necessary. (Refer to page 182)
*2 Set this parameter according to the motor (encoder) used.
*3 Use thermal protector input provided with the motor.
♦Parameters referred to♦
Vector control (speed control)
Vector control (torque control)
Vector control (position control)
Orientation control Refer to page 211.
Encoder feedback control
40
2
or larger) to connect the FR-A7AP and position detector. Cables to terminals
Paralell Connection
At least 2 cables
Cable gauge
At least 4 cables
0.2mm
At least 6 cables
2
or more. Note that the voltage applied should be within power supply specifications of encoder.
Initial
Value
1
1024
Pr. 9
Electronic thermal
O/L relay
Motor rated current
Motor rated current
Motor rated current
Motor rated current
Motor rated current
Motor rated current
Motor rated current
0
*3
0
*3
— Motor rated current
— Motor rated current
Refer to page 96.
Refer to page 120.
Refer to page 128.
Refer to page 364.
Larger-Size Cable
2
0.4mm
0.75mm
2
1.25mm
Setting
Range
0
Encoder
1
Encoder
Set the number of encoder pulses output.
0 to 4096
Set the number of pulses before it is multiplied by 4.
Pr. 71 Pr. 80
Applied motor Motor capacity
0 Motor capacity
20 Motor capacity
40 Motor capacity
3 Motor capacity
*1
1 Motor capacity
50 Motor capacity
13 Motor capacity
*1
30 Motor capacity
33 Motor capacity
*1
3 Motor capacity
*1
13 Motor capacity
*1
or larger
2
or larger
2
or larger
Earthing (grounding) example using a P clip
Encoder cable
Shield
P clip
Description
CW
Forward rotation is clockwise
A
rotation when viewed from A.
CCW
Forward rotation is counterclockwise
A
rotation when viewed from A.
Pr. 359
Pr. 81
Encoder rotation
Number of motor
poles
direction
1
Number of motor poles
1
Number of motor poles
Number of motor poles 1
Number of motor poles
*2
4 1
4 1
Number of motor poles
*2
4 1
4 1
Number of motor poles
*2
Number of motor poles
*2
2
Pr. 369
Number of
encoder pulses
1024
1024
1024
*2
1024
1024
*2
2048
2048
*2
*2