Hitachi WJ200-001L, Instruction Manual

Page: 230 / 680

4

23
Free-run Stop
When the terminal [FRS] is turned ON, the inverter stops the output and the motor
enters the free-run state (coasting). If terminal [FRS] is turned OFF, the output
resumes sending power to the motor if the Run command is still active. The free-run
stop feature works with other parameters to provide flexibility in stopping and starting
motor rotation.
In the figure below, parameter

selects whether the inverter resumes operation
from 0 Hz (left graph) or the current motor rotation speed (right graph) when the [FRS]
terminal turns OFF. The application determines the best setting.
Parameter

specifies a delay time before resuming operation from a free-run stop.
To disable this feature, use a zero delay time.
Option
Code
Terminal
Symbol
Function Name State Description

FRS Free-run Stop ON Causes output to turn OFF, allowing motor to free
run (coast) to stop
OFF Output operates normally, so controlled deceleration
and stops motor
Valid for inputs:

~

Example (requires input configuration
—
see page 3-85 ):
See I/O specs on
page 4
–6.
Required settings

,

,

to

Notes:

When you want the [FRS] terminal to be active
low (normally closed logic), change the setting
(

to

) that corresponds to the input
(

to

) that is assigned the [FRS]
function.
[FRS]
1
0
Motor speed
t
[FW,RV]
1
0
Zero frequency start

=

[FRS]
1
0
Motor speed
t
[FW,RV]
1
0
Resume from motor speed

=

 Wait time
FRS
7 6 5 4 3 2 1 L P24
PLC