Mitsubishi Electric MELSEC-Q Series User Manual page 143

[Pr.2] Number of pulses per rotation (AP)
Set the number of pulses required for a complete rotation of the motor shaft.
If you are using the Mitsubishi servo amplifier, set the value given as the
"resolution per servomotor rotation" in the speed/position detector specifications.
Number of pulses per rotation (AP) = Resolution per servomotor rotation
[Pr.3] Movement amount per rotation (AL), [Pr.4] Unit magnification (AM)
The amount how the workpiece moves with one motor rotation is determined by
the mechanical structure.
If the worm gear lead (  m/rev) is PB and the deceleration rate is 1/n, then
Movement amount per rotation (AL) = PB  1/n
However, the maximum value that can be set for this "movement amount per
rotation (AL)" parameter is 20000000.0  m (20m). Set the "movement amount per
rotation (AL)" as shown below so that the "movement amount per rotation (AL)"
does not exceed this maximum value.
Movement amount per rotation (AL)
= PB  1/n
= Movement amount per rotation (AL)  Unit magnification (AM)
Note) The unit magnification (AM) is a value of 1, 10, 100 or 1000. If the "PB 
1/n" value exceeds 20000000.0  m (20m), adjust with the unit magnification
so that the "movement amount per rotation (AL)" does not exceed
20000000.0  m (20m).
: Refer to Section 13.3.2 "Electronic gear function" information about electric
gear.
[Pr.1] setting value
0.1 to 2000000.0 (  m)
0 : mm
1 : inch 0.00001 to 2000.00000 (inch)
2 : degree 0.00001 to 2000.00000 (degree)
3 : PLS 1 to 200000000 (PLS)
Value set with GX Works2
(unit)
5 - 23
Chapter 5 Data Used for Positioning Control
Value set with sequence program
1 to 200000000 (  10
1 to 200000000 (  10
1 to 200000000 (  10
1 to 200000000 (PLS)
(unit)
 m)
-1
-5
inch)
-5
degree)