Mitsubishi Electric FR-A700 Instruction Manual page 425

Parameter
When pre-excitation is performed, select zero speed control or servo lock using Pr. 802..
0 (initial value)
Tab. 6-64: Selection of pre-excitation
Tthe relationship between the DC injection brake operation and pre-excitation operation under
each control is shown in the following table.
Control
Method
V/f control
Advanced
magnetic flux-
vector control
Real sensor-
less vector
control
Vector control
Tab. 6-65: Relationship between the DC injection brake operation and pre-excitation
FR-A700 EC
Pr. 802 Pre-excitation
Zero speed control
1 Servoverriegelung
Control Mode Pr. 802
— —
—
Speed
—
—
Torque
—
0
Speed
1
0
Torque
1
Position —
operation under each control.
Description
Even under load, an attempt is made to maintain 0r/min to keep
the motor shaft stopped. Note that if the shaft is overcome and tur-
ned by external force, it does not return to the original position.
Position control is not exercised and only speed control is carried
out to perform operation.
Even under load, an attempt is made to maintain the motor shaft
position. Note that if the shaft is turned by external force, it returns
to the original position after the external force has gone away.
Since position control is exercised, you can adjust this position
loop gain using Pr. 422 "Position loop gain".
Decelerates to
Pr. 850
Stop
— DC Injection brake
0 DC Injection brake
1 Zero speed
0 DC Injection brake
1 Zero speed
— Zero speed
— Servo lock
— Zero speed
— Servo lock
— —
Motor brake and stop operation
X13: ON
LX: ON
(Pr. 11 = 8888)
— DC Injection brake
Zero speed Zero speed
Zero speed Zero speed
Zero speed Zero speed
Servo lock Servo lock
Zero speed Zero speed
Servo lock Servo lock
Servo lock —
6 - 245