Programming instructions

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2.2 The FX Line of PLCs
Each of the PLCs in this family have certain characteristics in common:
1) An integrated power supply. Most of the PLCs in this line have a built in
power
supply that requires 100-240 VAC power. Several of the PLCs have a DC
power version available as well.
2) Integrated I/O. The main unit has a varying number of inputs and outputs,
dependent on the model chosen. The inputs are typically DC, although
certain models have AC inputs as well. All models have relay and transistor
output versions (except the FX0S), and several offer triac outputs.
3) Common Instructions. Although the higher-end PLCs have more instructions,
all PLCs at least support a common instruction set of 20 basic and 35 applied
instructions.
4) Built-in special functions. All FX PLCs have a built-in high speed counter (or
several high speed counters) and a pulse train output.
The FX Series Legacy
The F Series of PLCs was originally introduced in 1981 with the F PLC. The F
was then improved and revised several times, resulting in the F1, F1J and F2
models. After the F2 came the FX Series PLCs. Some of these models were the
FX, FX0, FX1, FX2, FX0S, FX0N, and FX2C, as well as the current offerings
FX1S, FX1N, FX2N, FX2NC, and FX3U. The current families of FX Series PLCs
are detailed below.
Sales of the Mitsubishi F Series PLCs have exceeded 6 million units worldwide!
FX1S
This PLC model is one Mitsubishi’s most advanced models. It has the small
footprint like the FX0S, but far more capability. It has more I/O (up to 30), more
internal devices, and has motion control capability. A small HMI (the FX1N-5DM)
can be connected to the front and used to monitor and change timers, counters
and data registers. This unit can use one expansion board, but has no
expansion bus.