)
To prevent this, increase acceleration time or reduce load. Motor capacity should be
also increased.
5-2-6 Motor Rotates in the Wrong Direction
•The motor output line is connected incorrectly.
IfterminalsU, V,andW ontheInverterarecorrectlyconnectedto terminals U,V, andW
on the motor, the motor rotates in the forward direction when a forward rotation com-
mand is input. Since the forward direction of rotation depends on the motor manufac-
turer and model, check the motor specifications.
To reverse the direction of rotation, switch the wires of two phases of U, V, and W as
shown below.
Inverter Motor
Forward rotation
Reverse rotation
5-2-7 Motor Deceleration is Too Slow
Deceleration Time is Too Long Even if a Braking Resistor is
Connected.
•Value 0 (stall prevention during deceleration) is set in n33.
When a braking resistor is connected, always set “1” (no stall prevention during decel-
eration) in n33. If “0” is set, the braking resistor will not be used.
•The deceleration time set in n21 (deceleration time 1) or n23 (deceleration time 2) is
too long.
Check the deceleration time setting.
•Motor torque is insufficient.
If the constant settings are normal and overvoltage does not occur, motor capacity is
insufficient.
Motor capacity should be increased.
Chapter 5
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