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Motor brake and stop operation
4.9.3 Stop selection (Pr. 250)
The above parameter can be set when Pr. 160 Extended function display selection = "0". (Refer to page 162)
Used to select the stopping method (deceleration to a stop or coasting) when the start signal turns OFF.
Used to stop the motor with a mechanical brake, etc. together with switching OFF of the start signal.
You can also select the operations of the start signals (STF/STR). (Refer to page 117 for start signal selection)
Parameter
Number
Name Initial Value Setting Range
Description
Start signal (STF/
STR)
(Refer to page 117)
Stop operation
250 Stop selection
9999
0 to 100s
STF signal:
Forward rotation start
STR signal:
Reverse rotation start
The motor is coasted to a stop
when the preset time elapses
after the start signal is turned
OFF.
1000s to 1100s
STF signal: Start signal
STR signal:
Forward/reverse signal
The motor is coasted to a stop
(Pr. 250 - 1000)s after the start
signal is turned OFF.
9999
STF signal:
Forward rotation start
STR signal:
Reverse rotation start
When the start signal is turned
OFF, the motor decelerates to
stop.
8888
STF signal: Start signal
STR signal:
Forward/reverse signal
(1) Decelerate the motor to a stop
Set Pr. 250 to "9999" (initial value) or "8888".
The motor decelerates to a stop when the start signal
(STF/STR) turns OFF.
(2) Coast the motor to a stop
Use Pr. 250 to set the time from when the start signal
turns OFF until the output is shut off. When any of "1000
to 1100" is set, the output is shut off in (Pr. 250 - 1000)s.
The output is shut off when the time set in Pr. 250 has
elapsed after the start signal had turned OFF. The motor
coasts to a stop.
The RUN signal turns OFF when the output stops.
REMARKS
Stop selection is invalid when the following functions are activated.
Power failure stop function (Pr. 261)
PU stop (Pr. 75)
Deceleration stop because of communication error (Pr. 502)
Jog operation mode
When setting of Pr. 250 is not 9999 nor 8888, acceleration/deceleration is performed according to the frequency command, until
start signal is OFF and output is shutoff.
NOTE
When the start signal is turned ON again during motor coasting, the motor starts at Pr. 13 Starting frequency.
Parameters referred to
Pr. 7 Acceleration time, Pr. 8 Deceleration time Refer to page 96
Pr. 13 Starting frequency Refer to page 98
Time
ON OFF
Start signal
Deceleration starts
when start signal turns off
Deceleration time
(Time set in Pr. 8, etc.)
DC brake
Output
frequency
(Hz)
ON OFF
RUN signal
OFF
ON
Start signal
Output is shut off
when set time elapses
after start signal turned off
Pr. 250
The motor coasts to stop
Time
O
FF
RUN signal
Output
frequency
(Hz)
ON