Flux Vector Control - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

• If the position detection value from the encoder enters ±∆θ during orientation stop, the Orientation complete (ORA) signal
is output.
Set point
 Orientation at the running status (under V/F control, Advanced magnetic

flux vector control)

1.
When the orientation command (X22) turns on, the motor speed decreases to the Pr.351 Orientation speed.
(Pr.351 is initially set to: 2 Hz)
2.
After the speed reaches the orientation speed, the speed further decreases to the Pr.352 Creep speed as soon as
the current position pulse reaches the Pr.353 Creep switchover position.
(Pr.352 is initially set to 0.5 Hz, Pr.353 is initially set to "511".)
3.
Moreover, as soon as the current position pulse reaches the Pr.354 Position loop switchover position, control is
changed to the position loop. (Pr.354 is initially set to "96".)
4.
After the motor moves into the position loop, the motor decelerates and stops by the DC injection brake as soon as
the current position pulse reaches the Pr.355 DC injection brake start position. (Pr.355 is initially set to "5".)
5.
When the motor stops in Pr.357 Orientation in-position zone, the orientation complete (ORA) signal is output after
Pr.363 Completion signal output delay time. If the motor does not stop within the in-position width because of
external force, etc., the ORA signal turns OFF after the time set in Pr.363. (Pr.357 is initially set to "5", Pr.363 is
initially set to 0.5 s.)
6.
If the orientation is not completed continuously in Pr.365 Orientation limit after passing the creep switchover
position, the orientation fault signal (ORM) is output.
7.
After the orientation starts, if the motor is stopped by external force, etc. before reaching the in-position width and
the ORA signal is not output, the ORM signal is output after the Pr.364 Encoder stop check time. If the motor is
moved out of the in-position width by external force, etc. after the ORA signal has been output once, the ORA signal
turns OFF after the set time in Pr.363. If the orientation is not completed within the time set in Pr.364, the ORM
signal is output.
8.
If the ORA and ORM signals have been output once, but the start signal (STF or STR) is turned OFF while the X22
signal is ON, the ORA or ORM signal is output again after Pr.366 Recheck time.
9.
The ORA and ORM signals cannot be output while the X22 signal is OFF.
560
5. PARAMETERS
5.14 (A) Application parameters
360
Pr.369
4 times
Number of encoder pulses
Pr.357