Check first when you have a trouble
Protective functions
6 - 36
6.6.6
Speed greatly differs from the setting
6.6.7
Acceleration/deceleration is not smooth
Check
points
Possible cause
Countermeasure
Refer to
page
Input
signal
Frequency setting signal is incorrectly input. Measure the input signal level.
⎯
The input signal lines are affected by
external EMI.
Take countermeasures against EMI, such as
using shielded wires for input signal lines.
Parameter
setting
Pr. 1 "Maximum frequency," Pr. 2 "Minimum
frequency", Pr. 18 "High speed maximum
frequency", and calibration parameter C2 to
C7 settings are improper.
Check the settings of Pr. 1, Pr. 2, and Pr. 18.
Check the calibration parameter C2 to C7
settings.
Pr. 31 to Pr. 36, Pr. 552 (frequency jump)
settings are improper.
Narrow down the range of frequency jump.
Load
Stall prevention function is
activated due to a heavy load.
Reduce the load weight.
⎯
Parameter
setting
Set Pr. 22 "Stall prevention operation level"
higher according to the load. (If Pr. 22 is set too
high, an overcurrent trip (E.OC
) is likely to
occur.)
Motor
Check the capacities of the inverter and the
motor.
⎯
Check
points
Possible cause
Countermeasure
Refer to
page
Parameter
setting
Acceleration/deceleration time is too short.
Increase the acceleration/deceleration time.
Torque boost (Pr. 0, Pr. 46) setting is
improper under V/F control, so the stall
prevention function is activated.
Increase/decrease the Pr. 0 "Torque boost"
setting value by 0.5% increments so that stall
prevention does not occur.
The base frequency does not match the
motor characteristics.
Under V/F control, set Pr. 3 "Base frequency",
Pr. 47 "Second V/F (base frequency)",.
Under Advanced magnetic flux vector control
or PM motor control, set Pr. 84 "Rated motor
frequency".
Regeneration avoidance operation is
performed
If the frequency becomes unstable during
regeneration avoidance operation, decrease
the setting of Pr. 886 "Regeneration avoidance
voltage gain".
Load
Stall prevention function is
activated due to a heavy load.
Reduce the load weight.
⎯
Parameter
setting
Set Pr. 22 "Stall prevention operation level"
higher according to the load. (If Pr. 22 is set too
high, an overcurrent trip (E.OC
) is likely to
occur.)
Motor
Check the capacities of the inverter and the
motor.
⎯
Содержание FR-F800
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Страница 28: ...Related manuals Introduction 1 8 ...
Страница 104: ...Connection of stand alone option units Installation and wiring 2 76 ...
Страница 162: ...Basic operation procedure JOG operation Basic operation 4 32 ...
Страница 720: ...Checking parameters changed from their initial values Initial value change list Parameters 5 558 ...
Страница 780: ...Measurement of main circuit voltages currents and powers Precautions for maintenance and inspection 7 20 ...
Страница 806: ...Outline dimension drawings Specifications 8 26 ...
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