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FX Series Programmable Controllers
4.12.5
Externally Adjusted Registers
The FX
and FX
1S
po ts " w h ich a re us e d t o a d jus t t he
co n te n ts of ce r ta in d e d ic a te d da ta
registers. The contents of these registers
can range from 0 to 255. This is a built in
feature and requires no additional setup
or programming.
The FX
and FX
2N
feature, however, an additional special
function unit is available which provides
the same function. The unit required is
the FX
-8AV-BD. For use, this unit
2N
requires the applied instructions VRRD
function 85 (Volume Read) and VRSC function 86 (Volume Scale).
Number of
setting pots
Number of
controlled
data registers
Uses:
• This facility is often used to vary timer settings, but it can be used in any application
where a data register is normally found, i.e. setting counters, supplying raw data, even
selection operations could be carried out using this option.
have built in "setting
1N
do not have this
2NC
FX
FX
1S
2 points,
plus 8 points: Supplied by using
the additional special function
board
FX
-8AV-BD
2N
1: D8030
2: D8031
Additional 8 points selected by
the user when applied
instructions VRRD and VRSC
are used.
FX
1N
2N
8 points: Supplied by using the
additional special function board
FX
2N
Selected by the user when
applied instructions VRRD and
VRSC are used.
Devices in Detail 4
Setting pot
of an FX
1S
RUN
STOP
FX
2NC
-8AV-BD
4-34
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