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

(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 38.
· 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
Vector control SF-V5RU
dedicated motor
(1500r/min series)
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 181)
*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 210.
Encoder feedback control Refer to page 361.
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
Pr. 71
Electronic thermal
Applied motor
O/L relay
Motor rated current
Motor rated current
Motor rated current
Motor rated current
Motor rated current
Motor rated current
Motor rated current 13
0
*3
— Motor rated current
— 13
Motor rated current
Refer to page 96.
Refer to page 120.
Refer to page 128.
Connection of motor with encoder (vector control)
Larger-Size Cable
2
0.4mm or larger
2
0.75mm or larger
2
2
1.25mm or larger
Earthing (grounding) example using a P clip
Setting
Range
0
A
Encoder
CCW
1
A
Encoder
Set the number of encoder pulses output.
0 to 4096
Set the number of pulses before it is multiplied by 4.
Pr. 80
Number of motor
Motor capacity
0 Motot capacity
Number of motor poles
20 Motot capacity
Number of motor poles
40 Motot capacity Number of motor poles
3 Motot capacity Number of motor poles
*1
1 Motot capacity
50 Motot capacity
Motot capacity Number of motor poles
*1
30 Motot capacity
3 Motot capacity Number of motor poles
*1
Motot capacity
Number of motor poles
*1
Encoder cable
Shield
P clip
Description
CW
Forward rotation is clockwise
rotation when viewed from A.
Forward rotation is counterclockwise
rotation when viewed from A.
Pr. 359 Pr. 369
Pr. 81
Encoder rotation Number of
poles direction encoder pulses
1
1
1
*2
4 1
4 1
*2
4 1
*2
*2
2
2
1024
1024
1024
*2
1024
1024
*2
2048
*2
*2
41