Sf-Pr Slip Amount Adjustment Mode - Mitsubishi Electric FR-A800 Series Instruction Manual

3.
Set frequency and voltage to be set in Pr.100 to Pr.109.
CAUTION
• Make sure to set the parameters correctly according to the motor used. Incorrect setting may cause the motor to overheat
and burn.
NOTE
• The adjustable 5 points V/F is enabled under V/F control.
• When Pr.19 Base frequency voltage = "8888 or 9999", setting of Pr.71 = "2" is not available. To set "2" in Pr.71, set the rated
motor voltage in Pr.19.
• A write disable error "
• Set frequency or voltage for each point in Pr.100 to Pr.109 within the range of Pr.3 Base frequency or Pr.19 Base frequency
voltage.
• When Pr.71 = "2", Pr.47 Second V/F (base frequency) and Pr.113 Third V/F (base frequency) are not available.
• When Pr.71 = "2", the inverter calculates the characteristic of the electronic thermal relay for a standard motor.
• By simultaneously using Pr.60 Energy saving control selection and the adjustable 5 points V/F, further energy saving effect
is expected.
• The Pr.0 Torque boost and Pr.12 DC injection brake operation voltage settings are automatically changed according to
the Pr.71 setting. (Refer to
Parameters referred to
Pr.0 Torque boostpage 706
Pr.3 Base frequency, Pr.19 Base frequency
Pr.12 DC injection brake operation
Pr.47 Second V/F (base frequency), Pr.113 Third V/F (base
Pr.60 Energy saving control
Pr.71 Applied motor, Pr.450 Second applied

5.16.7 SF-PR slip amount adjustment mode

V/F V/F V/F
• As compared to our conventional SF-JR motor, the slip amount is small for the high-performance energy-saving SF-PR
motor. When replacing the SF-JR to the SF-PR, the slip amount is reduced and the rotations per minute increases.
Therefore, when the SF-PR is used with the same frequency setting as that of the SF-JR, power consumption may
increase as compared to the SF-JR.
• By setting the slip amount adjustment mode, the frequency command can be adjusted to keep the rotations per minute of
the SF-PR equivalent to those of the SF-JR for power consumption reduction.
Pr.
673 SF-PR slip amount adjustment
G060 operation selection
674 SF-PR slip amount adjustment
G061 gain
• By setting the number of SF-PR motor poles in Pr.673 SF-PR slip amount adjustment operation selection, the SF-PR
slip amount adjustment mode is activated.
• The SF-PR slip amount adjustment mode is available only under V/F control.
714
5. PARAMETERS
5.16 (G) Control parameters
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Voltage
Base
frequency
voltage
Pr.19
Torque
boost
Pr.0
0
" is generated when the same frequency value is used for multiple points.
page 531.)
voltagepage 707
voltagepage 715
frequency)page 713
selectionpage 712
motorpage 528
Name Initial value
9999
100%
search engine
V/F5
V/F4
V/F3
V/F1
V/F2
Frequency
Base
V/F Characteristic
frequency
Pr.3
Setting range
2, 4, 6 Set the number of SF-PR motor poles.
9999 The slip amount adjustment is disabled.
0 to 500% Setting is available for fine adjustment of the slip amount.
Description