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10-1

The FX family of programmable controllers has a very easy to learn, easy to use instruction set
which enables simple programs to perform complex functions. This chapter will point out one
or two useful techniques while also providing the user with valuable reference programs.

If some of these techniques are applied to user programs the user must ensure that they will
perform the task or operation that they require. Mitsubishi Electric can take no responsibility for
user programs containing any of the examples within this manual.

Each program will include a brief explanation of the system. Please note that the method of
'how to program' and 'what parameters are available' for each instruction will not be discussed.
For this information please see the relevant, previous chapters.

When using DC powered FX programmable controllers, it is necessary to add the following
instructions to the beginning of the installed program:

With AC powered FX programmable controllers, the power break detection period can be
adjusted by writing the desired detection period to the special data register D8008.
However, in the case of DC powered units this detection period must be set to 5 msec.

This is achieved by moving the value of -4 into D8008. Failure to do this could result in inputs
being missed during the DC power 'drop'.

FX

0(S)

FX

0N

FX FX

(2C)

FX

2N(C)

FX

0(S)

FX

0N

FX FX

(2C)

FX

2N(C)

M8000

MOV

 K -4 D8008

Step 0

FX Series Programmable Controllers