Base Frequency, Base Frequency Voltage (Pr. 3, Pr. 19); Multi-Speed Operation (Pr. 4 To Pr. 6, Pr. 24 To Pr. 27, Pr. 232 To Pr. 239) - Mitsubishi Electric FR-V500 Instruction Manual

3.3.3

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).
• If only "50Hz" is given on the motor rating plate as the frequency, always set the "base frequency" to "50Hz". If it
remains at "60Hz", the voltage may become too low and torque shortage occurs, resulting in an overload trip.
• 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. This
function is useful when a motor rated at 200V is used with a 230V power supply.
• Set Pr. 19 "base frequency voltage" according to the motor as shown below.
SF-V5RU-3.7kW or less . . . . . . . . . . . "170V"
SF-V5RU-5.5kW or more . . . . . . . . . . "160V"
SF-V5RUH-3.7kW or less . . . . . . . . . "340V"
SF-V5RUH-5.5kW or more. . . . . . . . . "320V"
SF-VR. . . . . . . . . . . . . . . . . . . . . . . . . "160V"
SF-VRH . . . . . . . . . . . . . . . . . . . . . . . "320V"
Set "50Hz" in Pr. 3 "base frequency".
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 169.)
Related parameters
Motor setting ⇒ Pr. 71 "applied motor", Pr. 450 "second applied motor" (Refer to page 111.)
3.3.4 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)
Speed 2
(middle speed)
Speed 3
(low speed)
ON
RH
ON
RM
ON
RL
Priority: RL > RM > RH
Factory Setting
60Hz
9999
Speed 5
Speed 6
Speed 4
Speed 7
Time
ON ON ON
RH
ON ON ON
RM
ON ON
RL
REX
*1 If "9999" is set in Pr. 232 "multi-speed setting (speed 8)",
77
Basic functions (Pr. 0 to Pr. 9)
Setting
Range
10 to 200Hz Extended mode
Extended mode
0 to 1000V,
8888: 95% of power supply voltage
8888, 9999
9999: Same as power supply voltage
speed torque
Speed 10
Speed 11
Speed 12
Speed 9
Speed 13
Speed 8
Speed 14
Speed 15
ON ON ON ON
ON ON ON ON
ON
ON ON ON
ON ON ON ON ON ON ON ON
*1
the output speed is 0r/min when RH, RM and RL are turned off and REX is turned on.
Remarks
)
position
Time
3