Stop Selection (Pr.250) - Mitsubishi Electric FR-E700EX Instruction Manual

4.11.4 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 142 for start signal selection)
Parameter
Name
number
250 Stop selection
The above parameter can be set when Pr.160 Extended function display selection = "0". (Refer to page 182)
Deceleration starts
when start signal turns OFF
(r/min)
Start signal
ON
RUN signal
ON
(r/min)
Start signal
ON
RUN signal ON
REMARKS
 When setting of Pr.250 is not 9999 nor 8888, acceleration/deceleration is performed according to the speed command, until
start signal is OFF and output is shutoff.
 Turning ON the LX signal during pre-excitation will decelerate the motor to a stop even if the motor is set to coast to a stop.
NOTE
 Stop selection is invalid when the following functions are activated.
Position control
PU stop (Pr.75)
Deceleration stop because of communication error (Pr.502)
JOG operation mode
 While the motor is coasting, the operation cannot be restarted. Input the start signal after the motor is stopped to
restart the operation.
A PM motor is a magnet motor. High-voltage is generated at motor terminals while the motor is running. Do not
touch motor terminals and other parts until the motor stops to prevent an electric shock.
Parameters referred to
Pr.7 Acceleration time, Pr.8 Deceleration time
Pr.13 Starting speed
Initial Setting
value range
0 to 100s
1000s to 1100s
9999
9999
8888
Deceleration time
(Time set in Pr.8, etc.)
Zero speed control,
servo lock, or
DC injection brake
Time
OFF
OFF
Output is shut off when set
time elapses after start
signal turned OFF
Pr.250
The motor coasts to stop
Time
OFF
OFF
CAUTION
Refer to page 125
Refer to page 128
Motor brake and stop operation
Description
Start Signal (STF/STR)
(Refer to page 142)
STF signal: Forward rotation start
STR signal: Reverse rotation start
STF signal: Start signal
STR signal: Forward/reverse signal
STF signal: Forward rotation start
STR signal: Reverse rotation start
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.
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.
137
4