4-15
Example of Frequency Deceleration Stop
Output frequency
Forward rotation
(Reverse rotation)
Operation command
Deceleration time 1
Minimum output frequency determined
with constant set in n29: Factory-set to
1.5 kHz
Time
Interruption DC control time determined
with constant set in n47: Factory-set to 0.5
second
ON
OFF
(n21)
Note If the RUN signal is input again during a deceleration stop, deceleration will be
stopped at the point of the input and acceleration will proceed at that frequency.
Example of Free Running
Output frequency
Inertia of motor
Time
Forward rotation
(Reverse rotation)
Operation command
ON
OFF
Note Do not input a RUN signal during a free-running stop if the motor’s rotation speed
is not sufficient slowed. If a RUN signal is input under these conditions, a main
circuit overvoltage (OV) or overcurrent (OC) will be detected.
To restart a free-running motor, set a speed search command in one of the multi-
function inputs 1 to 3 (n06 to n08), use the speed search to detect the speed of the
free running motor, and then accelerate smoothly.
n04
Forward/Reverse Rotation Selection
Setting range
f%r , reU
Factory setting
f%r
(forward rota-
tion)
This constant is used to specify the direction of motor rotation when the Inverter is oper-
ated with the Digital Operator.
Value Description
f%r
Forward rotation
reU
Reverse rotation
Preparing for Operation Chapter 4
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