Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Analog Voltage and Pulse Train Reference - Manual (Page 154)

5 Operation
5.4.4 Trial Operation of Servomotor with Brakes
5-40
(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.
SGM V  
Symbol Specification Encoder Resolutions
Symbol Specification Encoder Resolutions
3 20-bit absolute 1048576
D 20-bit incremental 1048576
A 13-bit incremental 8192
SGMPS  
2 17-bit absolute 131072
C 17-bit incremental 131072
SGMCS غغغغغغغ
Symbol Specification Encoder Resolutions
3 20-bit absolute 1048576
D 20-bit incremental 1048576
Rotation