Programming instructions

FX1N

This model of PLC is one of Mitsubishi’s most advanced. It provides the

midrange number of I/O points similar to the FX0N, but has far more capability. It

has more internal devices (like 1536 M relays and 235 counters) than the FX0N,

and has motion control capability. Unlike the FX0N, the FX1N has a number of

option boards that can be added to provide additional ports or allow the

connection of FX0N communication modules. The FX1N-5DM can be connected

to the FX1N as well. This CPU does have the expansion bus capability, but is

limited to two expansion modules, which can be either discrete I/O extensions or

special function modules.

FX2N

This PLC types is currently one of Mitsubishi’s most powerful processors. It is

expandable and can control up to 256 I/O. It has 3072 internal relays, 256

timers, 234 counters, 8000 data registers, and up to 21 high-speed counters. All

the special function modules available for the enhanced FX are available with

this line, as well as several new modules. Modules for Profibus, CC-link, AS-

Interface and I/O link are available, as well as an electronic cam switch module.

Besides special function modules, the capabilities of this versatile PLC can be

extended by small expansion boards that can be connected to the front of the

PLC. These can give the user a second programming port, an RS-485 port, or

RS-232 port. FXON and FX modules can be used with this PLC.

FX2NC

This PLC is to the FX2N as the FX2C is to the FX. Similar to the FX2N in all

respects, save for no built-in real-time clock, this PLC uses distributed I/O. The

result is a PLC main unit that is the size of a cigarette pack. Expansion boards

cannot be used, but the full line of special function modules can still be

connected.

FX3U

The FX3U is Mitsubishi’s latest and most powerful processor. It is highly

expandable and can control up to a maximum of 384 I/O. It has more internal

memory, a faster CPU, and a new left side expansion bus. All the special

function modules available for the enhanced FX and FX2N are available with this

line, as well as several new modules. New networking options include a full

featured Ethernet module and a Profibus Master module. New communication

boards and adapters, including a new USB expansion board, can be used to

reach a maximum of 3 serial connections on this PLC. This processor comes

with 64,000 steps of program memory.

This training course will make use of the FX3U series PLC mainly, however most

of what is covered will apply to the entire FX series PLC line.