
High Resolution Serial Output
Circuit H
3/12
FANUC LTD
A-56731E-0089
Description Desig. Date Edit.
01 02.06.03 Kikuchi Taniguchi
title
Sheet
Draw. No.
02
03.04.08
Miyamoto
Add “For 750kHz” Taniguchi
(5) Resolution setting pin “SW3”
It is able to set resolution by SW3
“A” setting : 512 times interpolation
“B” setting : 2048 times interpolation
“B” is set for “SW3” by using shorting pin at shipping.
(6) Input specifications and examples of available linear encoders
(6)-1 Input specifications
A/B(type Ⅰ)
A/B(typeⅡ)
Specification Item Symbol
Min. Typ. Max.
Unit
Amplitude
(A/B phase)
typeⅠ a of A,B phase
typeⅡ b of A phase+b of XA phase,
b of B phase+b of XB phase
0.6 1.0 1.5 V
P-P
Amplitude
(Z phase)
c pf Z pahse + c of XZ phaseZ
(In case of analog signals)
0.2 0.4
-
V
Center Level
(DC Level)
typeⅠ V
OA,
V
XA
,V
OB,
V
XB
typeⅡ V
OA,
V
OXA
,V
OB,
V
OXB
V
OZ,
V
OXZ
2.0
2.5
3.0
V
Offset Voltage
(A/B phase)
typeⅠ V
OA
-V
XA
, V
OB
-V
XB
typeⅡ V
OA
-V
OXA
, V
OB
-V
OXB
-0.1 0 +0.1 V
Offset Voltage
(Z phase)
V
OZ
-V
OXZ
-0.05 0 +0.05 V
Pulse width of Z T
Z
600
- -
nSec
Length of Z L
Z
1/4
- -
pitch of A(or B)
Input Impedance 100 120 140
Ω
Input Frequency
(Standard Spec.)
- -
200 kHz
Input Frequency
(High-Speed Spec.) (Note)
- -
750 kHz
* The position accuracy depends on the quality of the signal from the encoder.
(Note) Refer to Section 10. for input frequency of 750kHz.
a
A
XA,
V
XB
B
OA,
V
OB
a/2
a/2
0V
XB
B
OA,
V
OXA
OB,
V
OXB
b/2
b/2
b
A
XA
0V
c/2
c/2
Usable
component
c
0V
OZ
T
Z,
L
Z
Z