Mitsubishi Electric FR-A700 Instruction Manual page 422

Motor brake and stop operation
Pr.
Name Initial Value
No.
DC injection
10
brake operation 3Hz
frequency
DC injection
11
brake operation 0.5s
time
00250
or
less
DC injection 00310
12
brake operation to
voltage 01800
02160
or
more
Pre-excitation
802
selection
Auswahl
850
Bremsbetrieb
This parameter can be set when the FR-A7AP (option) is mounted.
Operation frequency setting (Pr. 10)
When the frequency at which the DC injection brake operates is set to Pr. 10, the DC injection
brake is operated when this frequency is reached during deceleration.
At the Pr. 10 setting of "9999", the DC injection brake is operated when deceleration is made to
the frequency set in Pr. 13 "Starting frequency".
100
NOTES Performing pre-excitation (zero speed control) under real sensorless vector may cause
motor vibration, etc. at deceleration to stop. To prevent this, set Pr.10 DC injection brake
operation frequency to 0.5Hz or less.
The initial value of Pr. 10 automatically changes to 0.5Hz during vector control.
6 - 242
Setting
Description
Range
Set the operation frequency of the DC injection
0 to 120 Hz
brake.
9999 Operated at Pr. 13 or less.
0 DC injection brake (zero speed control) disabled
Set the operation time of the DC injection brake
0.1 to 10s
(zero speed control, servo lock).
8888 Operate when X13 signal is on.
4%
Set the DC injection brake voltage (torque).
2% 0 to 30%
When "0" is set, DC injection brake is disabled.
1%
0 Zero speed control
0
1 Servo lock
0 DC injection brake operation
0
1 Zero speed control
Pr. 12
Pr. 11
Fig. 6-96:
When Pr. 11 is set to a value between 0.1
and 10s
Pr. 10
t
t
Parameter
Refer to
Parameters referred to
Section
13 Starting 6.11.2
frequency
71 Applied motor
6.12.2
178–189 Input terminal
6.14.1
function selec-
tion
422 Position loop
6.5.6
gain
I000007C