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Motor brake and stop operation
4
PARAMETERS
4.11 Motor brake and stop operation
4.11.1 Zero speed control, pre-excitation, servo-ON, and servo lock (Pr.10, Pr.11, Pr.795,
Pr.802, LX signal, SON signal)
The above parameters can be set when Pr.160 Extended function display selection = "0". (Refer to page 182)
When a value exceeding 3000 r/min is set, the rotation speed will be limited at 3000 r/min.
Also, when an S-PM geared motor is used, the maximum setting value differs depending on the drive unit capacity. (0.2 to 2.2K: 12000 r/min, 3.7K: 8000 r/
min)
This parameter is available with S-PM geared motors.
This parameter is available with MM-GKR motors.
......Specifications differ according to the date assembled. Refer to page 316 to check the SERIAL number.
(1) Operation speed setting (Pr.10)
When the speed at which coasting starts is set in Pr.10, output is shutoff when this speed is reached during deceleration
and motor starts coasting.
When Pr.11 "0", Pr.10 is always set to 0r/min.
(2) Operation time setting (Pr.11)
In Pr.11, set the time of DC injection brake control.
When the motor does not stop due to large load moment (J), increasing the setting produces an effect.
When Pr.11 = "0s", DC injection brake control is disabled. (At a stop, the motor coasts.)
Purpose Parameter to set Refer to page
To adjust the braking operation
DC injection brake, zero
speed control, servo lock
Pr.10, Pr.11, Pr.795, Pr.802
131
To activate the electromagnetic
brake by the output signal
Electromagnetic brake
interlock
Pr.736
135
To improve the motor braking
torque with an option
Selection of a
regenerative brake
Pr.30, Pr.70
136
To coast the motor to a stop
Selection of motor
stopping method
Pr.10, Pr.11, Pr.250
137
Zero speed control is performed and applies braking torque to stop the motor.
Parameter
number
Name Initial value Setting range Description
10 Coasting speed
90r/min 0 to 4800r/min The speed where the motor starts coasting
11
DC injection brake
operation time
0.5s
0 Injection brake control disabled
0.1 to 10s Operation time of injection brake control
795
DC brake torque boost
9999
0 to 150%
Maximum torque that can be generated during
DC injection brake (pre-excitation) operation
9999 50% setting
802
Pre-excitation selection
(brake operation selection)
0
0 Zero speed control
1 Servo lock
Operation example with injection
brake control enabled (Pr.11 "0")
Zero speed control
or servo lock/ DC
injection brake
Pr.11 Operation time
Time
Time
Injection brake control
is exercised 0r/min.
Operation example with injection brake
control disabled (Pr.11 = "0s")
Zero speed control
or servo lock/ DC
injection brake
Motor coasting
Time
Time
Pr.10
Coasting speed
(r/min)
(r/min)
Rotation
speed
Rotation
speed