Mitsubishi Electric 800 Series Instruction Manual page 484

Orientation from the forward rotation direction (Pr.393 = "1, 11") (Vector
control)
• This method is used to improve the stopping precision and maintain the mechanical
precision when the backlash is large.
• If the motor is running in the forward rotation direction, it will make an orientation
stop with the same method as "orientation from the current rotation direction".
• If the motor is running in reverse, it will decelerate, change to the forward rotation
direction, and then orientation stop will be executed.
Orientation from the reverse rotation direction (Pr.393 = "2, 12") (Vector
control)
• If the motor is running in the reverse rotation direction, it will make an orientation
stop with the same method as "orientation from the current rotation direction".
• If the motor is running in forward, it will decelerate, change to the reverse rotation
direction, and then orientation stop will be executed.
NOTE
• Couple the encoder with the motor shaft that stops the shaft at the specified position. Couple it with the speed ratio of 1:1 and
without any mechanical looseness.
• To ensure correct positioning, the encoder must be set in the proper rotation direction, and the A and B phases must be
connected correctly.
• If the pulse signal from the encoder stops due to encoder signal loss, etc. during orientation, orientation may not be
completed.
• To terminate orientation, the start signal (STF or STR) must be first switched OFF, and then the orientation signal (X22) must
be switched OFF. As soon as this orientation signal is switched OFF, orientation control ends.
• When performing orientation control, properly set Pr.350 Stop position command selection and Pr.360 16-bit data
selection.
If the values set are incorrect, proper orientation control will not be performed.
• When orientation control is performed, PID control is disabled.
• If Signal loss detection (E.ECT) is displayed when the X22 signal is ON, causing the inverter to trip, check for a break in the
cable of the Z phase of the encoder.
(A) Application parameters
Speed
(forward
rotation)
X22
ORA
Speed
(reverse
rotation)
X22
ORA
Speed
(forward
rotation)
X22
ORA
Speed
(reverse
rotation)
X22
ORA
PARAMETERS
[t]
[t]
[t]
[t]
5
GROUP
A
483