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11 Use of Built-in Analog
99
FX
3S
 Series Programmable Controllers
User's Manual - Hardware Edition
11
Bui
lt-
in Anal
og
12
O
utpu
t Wi
ring
13
Wiri
ng for
Va
rious U
ses
14
Te
st R
un,
M
ain
tenanc
e,
Troub
le
shooting
15
Oth
er Ex
tensi
on
U
nit
s and
Opti
ons
16
Displ
ay
 Modul
(FX
3S
-5
D
M
)
17
Me
m
ory
C
ass
ette
A
Spec
ial D
evices 
(M
8000-,
 D8000-)
B
Instruc
tion Li
st
C
Di
sc
onti
nued
model
s
11.1 Outline
11.1
Outline
This section explains handling of the built-in variable analog potentiometer and built-in analog input.
For the built-in variable analog potentiometer function, refer to Section 11.2.
For the built-in analog input function, refer to Section 11.3.
11.2
Built-in variable analog potentiometer function
11.2.1 Outline of functions
The main unit has two built-in variable analog potentiometers function (shown in the figure below).
The value increases from 0 to 255 when the variable analog potentiometer is turned clockwise, and will be
automatically written to a special data register of the PLC.
11.2.2 Applicable PLC
The following models have built-in variable analog potentiometers.
11.2.3 Special data register
The current value of each variable analog potentiometer is stored in special data registers shown below.
Applicable PLC
FX3S-10MR/ES
FX3S-10MT/ES
FX3S-10MT/ESS
FX3S-10MR/DS
FX3S-10MT/DS
FX3S-10MT/DSS
FX3S-14MR/ES
FX3S-14MT/ES
FX3S-14MT/ESS
FX3S-14MR/DS
FX3S-14MT/DS
FX3S-14MT/DSS
FX3S-20MR/ES
FX3S-20MT/ES
FX3S-20MT/ESS
FX3S-20MR/DS
FX3S-20MT/DS
FX3S-20MT/DSS
FX3S-30MR/ES
FX3S-30MT/ES
FX3S-30MT/ESS
FX3S-30MR/DS
FX3S-30MT/DS
FX3S-30MT/DSS
Variable analog potentiometer
Data register to store current value
VR1 (Upper side): Variable analog potentiometer 1
D8030 (Integer from 0 to 255)
VR2 (Lower side): Variable analog potentiometer 2
D8031 (Integer from 0 to 255)
Variable analog potentiometer
enlarged view
VR2
VR1