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Stop Selection (pr. 250) - Mitsubishi Electric FR-B-750 to 75K Instruction Manual

Fr-b-750 to 75k (200v class), fr-b-750 to 110k (400v class).
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Motor brake and stop operation

4.10.3 Stop selection (Pr. 250)

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 123 for start signal selection)
Parameter
Name
Number
250
Stop selection
Start
ON
signal
RUN
signal
ON
ON
Start signal
ON
RUN signal
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 fault definition (Pr. 875)
⋅ Deceleration stop because of communication error (Pr. 502)
⋅ Offline auto tuning (with motor running)
⋅ Emergency stop by L
ON
CAUTION
⋅ 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
Pr. 13 Starting frequency
104
Initial Value Setting Range
1000s to 1100s
9999
Deceleration starts
when start signal turns off
Deceleration time
(Time set in Pr. 8, etc.)
DC brake
Time
OFF
OFF
Output is shut off when set
time elapses after start signal
turns off
Pr.250
Motor coasts to stop
Time
OFF
OFF
W
communication
ORKS
Refer to page 88
Refer to page 90
Start signal (STF/STR)
(Refer to page 123)
STF signal: Forward
rotation start
0 to 100s
STR signal: Reverse
rotation start
STF signal: Start signal
STR signal: Forward/
reverse signal
STF signal: Forward
rotation start
9999
STR signal: Reverse
rotation start
STF signal: Start signal
8888
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 after
(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.
Description
Stop operation
The motor is coasted to a
stop when the preset time
elapses after the start
signal is turned off.The
motor is coasted to a stop
(Pr. 250 - 1000)s after the
start signal is turned off.
When the start signal is
turned off, the motor
decelerates to stop.

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