Yaskawa Sigma-5 Large Capacity Users Manual: Design and Maintenance-Rotary Motors-Analog Voltage and Pulse Train Reference - Manual (Page 162)

5.4 Position Control
5-41
5
Ope
rat
ion
(1) Electronic Gear Ratio
Set the electronic gear ratio using Pn20E and Pn210.
If the gear ratio of the servomotor and the load shaft is given as n/m where m is the rotation of the servomotor
and n is the rotation of the load shaft,
Encoder Resolution
Encoder resolution can be checked with servomotor model designation.
Pn20E
Electronic Gear Ratio (Numerator)
Classification
Setting Range Setting Unit Factory Setting When Enabled
1 to 1073741824 1 4 After restart Setup
Pn210
Electronic Gear Ratio (Denominator)
Classification
Setting Range Setting Unit Factory Setting When Enabled
1 to 1073741824 1 1 After restart Setup
Position
Position
Electronic gear ratio: =
A
B
Pn210
Pn20E
=
n
m
Encoder resolution
Travel distance per load
shaft revolution (reference units)
× Rotation
Electronic gear ratio setting range: 0.001 ≤ Electronic gear ratio (B/A) ≤ 4000
If the electronic gear ratio is outside this range, a parameter setting error 1 (A.040) will
be output.
SGMVV  
Symbol Specification Encoder Resolutions
3 20-bit absolute 1048576
D 20-bit incremental 1048576