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Main circuit terminal specifications
(3)
Total wiring length
Under general-purpose motor control
Connect one or more general-purpose motors within the total wiring length shown in the following table.
200V class
Pr. 72 PWM frequency selection Setting
(carrier frequency)
1 (1kHz) or less
2 to 15
(2kHz to 14.5kHz)
400V class
Pr. 72 PWM frequency selection Setting
(carrier frequency)
1 (1kHz) or less
2 to15
(2kHz to 14.5kHz)
Total wiring length when using a general-purpose motor
(FR-F720PJ-1.5K or higher, FR-F740PJ-3.7K or higher)
When driving a 400V class motor by the inverter, surge voltages attributable to the wiring constants may occur at the
motor terminals, deteriorating the insulation of the motor.
enhanced motor" and set a frequency in Pr. 72 PWM frequency selection according to the total wiring length shown in the
following table. (Refer to page 52 to drive a 400V class motor with an inverter.)
Pr. 72 PWM frequency selection Setting
(carrier frequency)
Under IPM motor control
Use the following length of wiring or shorter when connecting an IPM motor.
Pr. 72 PWM frequency selection Setting
(carrier frequency)
4 (2.5kHz) or less
5 (5kHz) or higher
Use one dedicated IPM motor for one inverter. Multiple IPM motors cannot be connected to an inverter.
NOTE
Especially for long-distance wiring, the inverter may be affected by a charging current caused by the stray
capacitances of the wiring, leading to a malfunction of the overcurrent protective function, fast-response current limit
function, or stall prevention function or a malfunction or fault of the equipment connected on the inverter output side.
If malfunction of fast-response current limit function occurs, disable this function.
If malfunction of stall prevention function occurs, increase the stall level.
(Refer to page 96 for Pr. 22 Stall prevention operation level and Pr. 156 Stall prevention operation selection )
When using the automatic restart after instantaneous power failure function for a general-purpose motor with the
wiring length longer than 100m, select "without frequency search" by setting Pr.162 = "1 or 11." (Refer to page 161)
The surge voltage suppression filter (FR-ASF-H/FR-BMF-H) option cannot be used under IPM motor control, so do
not connect them.
Parameters referred to
Pr.72 PWM frequency selection
24
0.4K
0.75K
300m
500m
200m
300m
0.4K
0.75K
200m
200m
30m
100m
500m or less
If that is the case,
50m or less
15 (14.5kHz) or less
400V class 0.4K
50m
Refer to page 181
1.5K
or higher
500m
500m
1.5K
2.2K
300m
500m
200m
300m
300m
300m
300m+300m=600m
use a "400V class inverter-driven insulation-
Wiring Length
50m to 100m
Exceeding 100m
8 (8kHz) or less
2 (2kHz) or less
200V class 0.4K or higher
400V class 0.75K or higher
100m
30m
3.7K
or higher
500m
500m
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