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Basic functions (Pr. 0 to Pr. 9)
4.3.3
Base frequency, base frequency voltage (Pr. 3, Pr. 19)
Use this parameter for V/F control only.
This parameter matches the inverter outputs (voltage, frequency) to the motor rating.
Parameter
Name
3
Base frequency
19
Base frequency voltage
<Setting>
• Use Pr. 3 to set the base frequency (rated motor frequency).
• Use Pr. 19 to set the base voltage (e.g. rated motor voltage).
The motor whose rated voltage is lower than the power supply voltage of the inverter can be used optimally.
REMARKS
If vector control is disabled due to an encoder fault, setting "20" in Pr. 800 "control system selection" enables operation under
V/F control. (Refer to page 182.)
Related parameters
Motor setting ⇒ Pr. 71 "applied motor", Pr. 450 "second applied motor" (Refer to page 123.)
4.3.4
Multi-speed operation
(Pr. 4 to Pr. 6, Pr. 24 to Pr. 27, Pr. 232 to Pr. 239
Can be used to change between the predetermined running speeds by switching from one terminal to
another.
Any speed can be selected by merely turning on-off the contact signals (RH, RM, RL, REX signals).
Using these parameters with Pr. 1 "maximum speed" and Pr. 2 "minimum speed" allows the setting of up to
17 speeds.
POINT
Valid in the external operation mode or in the combined operation mode that is made available by setting "3 or
4" in Pr. 79.
Valid when "0" is set in Pr. 59.
Speed 1
(high speed)
(middle speed)
ON
RH
ON
RM
RL
Priority: RL > RM > RH
Factory Setting
60Hz
9999
Speed 5
Speed 2
Speed 6
Speed 4
Speed 3
(low speed)
Speed 7
Time
ON ON ON
ON
ON
ON
ON
ON
ON
Setting
Range
20 to 200Hz
Extended mode
Extended mode
0 to 1000V,
8888: 95% of power supply voltage
8888, 9999
9999: Same as power supply voltage
with
without
Encoder
Encoder
Speed
Speed 10
Speed 11
Speed 12
Speed 9
Speed 13
Speed 8
ON ON ON ON
RH
ON ON
RM
ON
ON
ON
RL
ON
ON
ON ON ON ON ON ON
REX
90
Remarks
with
without
Condi-
Encoder
Encoder
tional
Torque
Position
Speed 14
Speed 15
Time
ON ON
ON
PLC
SSC
)
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Troubleshooting
