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 B088 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 B003 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
ON
Causes output to turn OFF, allowing motor to free
run
(
coast
)
to stop
11
FRS
Free
-
run Stop
OFF
Output operates normally, so controlled
deceleration and stops motor
Valid for inputs
:
C001~C005
Required settings
B003, B088, C011 to C015
Notes
:
x
When you want the
[
FRS
]
terminal to be active
low
(
normally closed logic
)
, change the setting
(
C011 to C015
)
that corresponds to the input
(
C001 to C005
)
that is assigned the
[
FRS
]
function.
Example (requires input configuration—
see
page 3–49
):
See I/O specs on
page 4–6.
5
4
3
2
1
L
PCS P24
FRS
[FRS]
1
0
Motor speed
t
[FW,RV]
1
0
Zero frequency start
B088 = 00
[FRS]
1
0
Motor speed
t
[FW,RV]
1
0
Resume from motor speed
B088 = 01
B003
Wait time
4
18
Operations and
Monitori
ng
4
−
18
Operations and
Monitoring
