
48
ENCODER FEEDBACK CONTROL—A500(L)
5) In the vector control mode, vector control is also exercised during acceleration/deceleration.
6) Do not switch off the 5V power of the encoder during vector control. Proper vector control cannot be
performed if that power is switched off.
7) Proper vector control cannot be performed if the pulse signal from the encoder is lost due to an open cable, etc.
8) In the vector control mode, the carrier frequency is as follows:
Pr. 72
Setting
Carrier Frequency
V/F control, advanced
magnetic flux vector
control
Vector control
0
0.7kHz
Approximately
1kHz
1
1kHz
2
2kHz
(*2)
3
3kHz
Approximately
3kHz
4
4kHz
5
5kHz
6
6kHz
(*1)
Approximately
6kHz
7
7kHz
8
8kHz
9
9kHz
10
10kHz
11
11kHz
12
12kHz
13
13kHz
14
14kHz
15
14.5kHz
CAUTION
In the vector control mode, set the Pr. 72 "PWM frequency selection" value during a stop.
Carrier Frequency
Pr. 72
Setting
V/F control, advanced
magnetic flux vector
control
Vector control
0.7kHz
1
2.5kHz (*2)
0
2
1kHz
Approximately
1kHz
For FR-A
500L
series
*1 When the capacity of the inverter is the same as that of
the motor, do not set to "6" or greater (approximately
6kHz). in Pr. 72 "PWM frequency selection".
When the capacity of the inverter is one rank higher
than that of the motor, "6" (appoximately 6KHz) or a
higher value may be set in Pr. 72 "PWM frequency
selection".
*2 For the FR-A500L series, this frequency is 2.5kHz and
settings " 3 to 15" are unavailable.