
Troubleshooting
Check first when you have troubles
FR-D700 SC EC
7 - 25
7.6.7
Acceleration/deceleration is not smooth
Check points Possible Cause
Countermeasures
Refer to
Page
Parameter
Setting
Acceleration/deceleration time is too
short.
Increase 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 Pr. 0 "Torque boost"
setting value by 0.5% increments to the
setting.
The base frequency does not match the
motor characteristics.
For V/f control, set Pr. 3 "Base frequency"
and Pr. 47 "Second V/f (base frequency)".
For general-purpose magnetic flux vector
control, set Pr. 84 "Rated motor fre-
quency".
Stall prevention function is activated due
to a heavy load.
Reduce the load weight.
—
Set Pr. 22 "Stall prevention operation level
"higher according to the load. (Setting
Pr. 22 too large may result in frequent
overcurrent trip (E.OC
).)
Check the capacities of the inverter and
the motor.
—
Regeneration avoidance operation is per-
formed
If the frequency becomes unstable during
regeneration avoidance operation,
decrease the setting of Pr. 886 "Regene-
ration avoidance voltage gain".
Содержание FR-D720S SC EC
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Страница 24: ...Description of the case Product checking and part identification 1 4 ...
Страница 108: ...Operation panel Operation 4 20 ...
Страница 436: ...Setting for the parameter unit and operation panel Parameter 6 286 ...
Страница 484: ...Measurements on the main circuit Maintenance and inspection 8 14 ...
Страница 504: ...Specification change Appendix A 20 ...
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Страница 510: ...Index Appendix A 24 ...
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