Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 74

[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 (R:
D38562+32n, D38563+32n/Q: D13242+20n, D13243+20n)" at ring counter based on the setting value.
The unit settings are in synchronous encoder axis position units. (Page 55 Synchronous encoder axis position units)
Set a value within the range from 1 to 2147483647.
■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[pulse/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)
Setting item
[Pr.321] Synchronous encoder
axis unit setting
[Pr.322] Synchronous encoder axis unit conversion: Numerator
[Pr.323] Synchronous encoder axis unit conversion: Denominator
[Pr.324] Synchronous encoder axis length per cycle
Synchronous encoder
input pulse
[Pr.322], [Pr.323]
Synchronous encoder
axis unit conversion
[Md.320] Synchronous encoder axis
current value
(R: D38560+32n, D38561+32n/
Q: D13240+20n, D13241+20n)
[Md.321] Synchronous encoder axis
current value per cycle
(R: D38562+32n, D38563+32n/
Q: D13242+20n, D13243+20n)
[Md.322] Synchronous encoder axis
speed
(R: D38564+32n, D38565+32n/
Q: D13244+20n, D13245+20n)
(Speed after unit conversion)
4 INPUT AXIS MODULE
72
4.3 Synchronous Encoder Axis
Control unit
Number of decimal places for position
Speed time unit
Number of decimal places for speed
[pulse]
40000
20000
[×0.1degree]
7200
3600
[×0.1degree]
[Pr.324] Synchronous encoder axis length per cycle
3600
[×0.001degree/min]
Setting details
2: degree
1
1: min
3
360.0 [degree]×1
4000 [pulse]×5
360.0 [degree]
t
t
t
t
Setting value
3112H
3600 [×0.1degree]
20000 [pulse]
3600 [×0.1degree]