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Mitsubishi Electric QD77MS User Manual Page 72

Simple motion module.
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[Pr.324] Synchronous encoder axis length per cycle
Set the length per cycle for the synchronous encoder axis current value per cycle.
The current value of synchronous encoder axis is stored in "[Md.321] Synchronous
encoder axis current value per cycle" at ring counter based on the setting value.
The unit settings are in synchronous encoder axis position units (Refer to Section 2.2.1).
Set a value within the range from 1 to 2147483647.
Example) Setting example of the unit conversion and the length per cycle.
The following shows an example a rotary encoder is connected which resolution is
4000[PLS/rev] to the motor axis side on the rotation table that drives by 1/5 pulley system,
and the control unit is degree.
• Position unit
: 0.1 [degree]
• Speed unit
: 0.001 [degree/min]
• Length per cycle : 360.0 [degree] (1 cycle of the rotation table)
[Pr.321]
Synchronous encoder
axis unit setting
[Pr.322] Synchronous encoder axis unit conversion: Numerator
[Pr.323] Synchronous encoder axis unit conversion: Denominator 4000 [PLS]
[Pr.324]Synchronous encoder axis length per cycle
Synchronous encoder
input pulse
Pr.322 ,
Synchronous encoder axis
unit conversion
Md.320
Synchronous encoder axis
current value
Md.321
Synchronous encoder axis
current value per cycle
Md.322
Synchronous encoder axis
speed (Speed after unit
conversion)
Setting item
Control unit
Number of decimal places for position
Speed time unit
Number of decimal places for speed
[PLS]
40000
Pr.323
20000
[ 0.1degree]
7200
3600
[ 0.1degree]
3600
[ 0.001degree/min]
2 - 24
Chapter 2 Input Axis Module
Setting details
2: degree
1
1: minute [min]
3
360.0 [degree]
1
5
360.0 [degree]
Pr.324
Synchronous encoder axis
length per cycle
Setting value
3112h
3600 [ 0.1degree]
20000 [PLS]
3600 [ 0.1degree]
t
t
t
t

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