2.4 The MELSEC FX Family
MELSEC means MITSUBISHI ELECTRIC SEQUENCER. The compact micro-controllers of the
MELSEC FX series provide the foundation for building economical solutions for small to
medium-sized control and positioning tasks requiring 10 to 256 integrated inputs and outputs in
applications in industry and building services.
With the exception of the FX
1S all the controllers of the FX series can be expanded to keep pace
with the changes in the application and the user’s growing requirements.
Network connections are also supported. This makes it possible for the controllers of the FX
family to communicate with other PLCs and controller systems and HMIs (Human-Machine
Interfaces and control panels). The PLC systems can be integrated both in MITSUBISHI net
-
works as local stations and as slave stations in open networks like PROFIBUS/DP.
In addition to this you can also build multi-drop and peer-to-peer networks with the controllers of
the MELSEC FX family.
The FX
1N,FX2N,FX3G,FX3UC and FX3U have modular expansion capabilities, making them
the right choice for complex applications and tasks requiring special functions like analog-digital
and digital-analog conversion and network capabilities.
All the controllers in the series are part of the larger MELSEC FX family and are fully compatible
with one another.
햲
Connectable to the left side
햳
Connectable to the right side
The MELSEC FX Family The Hardware
2-6 MITSUBISHI ELECTRIC
Specifications FX1S FX1N FX2N FX2NC FX3G FX3U FX3UC
Max integrated I/O points 30 60 128 96 60 128 96
Expansion capability
(max. possible I/Os)
34 132 256 256 256 384 384
Program memory (steps) 2000 8000 16000 16000 32000 64000 64000
Cycle time per logical
instruction (ms)
0.55–0.7 0.55–0.7 0.08 0.08 0.21/0.42 0.065 0.065
No. of instructions
(standard / step ladder /
special function)
27 / 2 / 85 27 / 2 / 89 27 / 2 / 107 27 / 2 / 107 29 / 2 / 123 27 / 2 / 209 29 / 2 / 209
Max. special function
modules connectable
—2844
햲
/ 8
햳
10
햲
/ 8
햳
6
햲
/ 8
햳
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