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

Connection of motor with encoder (vector control)
(6) Instructions for encoder cable wiring
• Use shielded twisted pair cables (0.2mm
and position detector. Cables to terminals PG and SD should be connected in
parallel 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 At least two cables in parallel
Within 20m At least four cables in parallel
Within 100m * At least six cables in parallel
* 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
or more. Note that the voltage applied should be within power supply specifications of encoder.
• To reduce noise of the encoder cable, earth (ground) the encoder
shielded cable to the enclosure (as close as possible to 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 35.
· 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
369
encoder pulses
The above parameters can be set when the FR-A7AP/FR-A7AL (option) is mounted.
(8) Motor for vector control and parameter setting
Motor Name
SF-JR
SF-JR 4P 1.5kW
Mitsubishi standard
or lower
motor
SF-HR
Others
SF-JRCA 4P
Mitsubishi constant-
SF-HRCA
torque motor
Others
SF-V5RU
(1500r/min series)
Mitsubishi vector
SF-V5RU
control dedicated
(except for 1500r/
motor
min series)
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 189)
*2 Set this parameter according to the motor (encoder) used.
*3 Use thermal protector input provided with the motor.
38
2
or larger) to connect the FR-A7AP
Parallel Connection
Cable
gauge
0.2mm
2
in parallel or a cable with gauge size of 1.25mm
Initial Setting
Value Range
0
1
1
0 to
1024
4096
Pr. 9
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
0
*3
0
*3
0
*3
— Motor rated current
— Motor rated current
Larger-Size Cable
2
0.4mm or larger
2
0.75mm or larger
2
2
1.25mm or larger
CW
A
Encoder
CCW
Forward rotation is counterclockwise
A
rotation when viewed from A.
Encoder
Set the number of encoder pulses output.
Set the number of pulses before it is multiplied by 4.
Pr. 71 Pr. 80
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
13 Motor capacity
*1
33 Motor capacity
*1
3 Motor capacity
*1
13 Motor capacity
*1
Example of parallel connection
with two cables
(with complementary encoder output)
FR-A700
(FR-A7AP)
PA1
PA2
FB1
FB2
PZ1
PZ2
PG
SD
2
2mm
2
Earthing (grounding) example using a P-clip
Encoder cable
Shield
P-clip
Description
Forward rotation is clockwise
rotation when viewed from A.
Pr. 359
Pr. 81
Encoder rotation
Number of motor
poles
direction
1
Number of motor poles
4 1
Number of motor poles 1
Number of motor poles
*2
4 1
1
Number of motor poles
Number of motor poles
*2
4 1
4 1
4 1
Number of motor poles
*2
Number of motor poles
*2
PLG
A
B
C
D
F
G
S
R
Set the rotation
direction
according to
the motor
specification.
Pr. 369
Number of
encoder pulses
1024
1024
1024
*2
1024
1024
*2
2048
2048
2048
*2
*2