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FX Series Programmable Controllers Devices in Detail 4
4-37
4.12.5 Externally Adjusted Registers
The FX
0
and FX
0N
have built in “settin
g
pots” which are used to ad
j
ust the
contents of certain dedicated data
re
g
isters. The contents of these re
g
isters
can ran
g
e from 0 to 255. This is a built in
feature and requires no additional setup
or pro
g
rammin
g
.
The FX, FX
2C
and FX
2N(C)
do not have
this feature, however, an additional
special function unit is available which
provides the same function. For the FX
and FX
2C
the unit is the FX-8AV. For
FX
2N(C)
the unit is the FX
2N
-8AV-BD. To
use this unit requires the applied instructions VRRD function 85 (Volume Read) and VRSC
function 86 (Volume Scale).
Uses:
• This facilit
y
is often used to var
y
timer settin
g
s, but it can be used in an
y
application
where a data re
g
ister is normall
y
found, i.e. settin
g
counters, suppl
y
in
g
raw data, even
selection operations could be carried out usin
g
this option.
FX
0(S)
FX
0N
FX FX(
2C)
FX
2N(C)
Number of
setting pots
1 point 2 points
8 points: Supplied b
y
usin
g
the additional special
function block
FX-8AV or FX
2N
-8AV-BD
Number of
controlled
data registers
1: D8013
1: D8013 or
D8030,
2: D8031
Selected b
y
the user when applied instructions
VRRD and VRSC are used.
RUN
STOP
67
5
5
Setting pot
of an FX
0