Points Of Technique 10
10-1
10. Points Of Technique
10.1 Advanced Programming Points
The FX famil
of pro
rammable controllers has a ver
eas
to learn, eas
to use instruction set
which enables simple pro
rams to perform complex functions. This chapter will point out one
or two useful techniques while also providin
the user with valuable reference pro
rams.
If some of these techniques are applied to user pro
rams the user must ensure that the
will
perform the task or operation that the
require. Mitsubishi Electric can take no responsibilit
for
user pro
rams containin
an
of the examples within this manual.
Each pro
ram will include a brief explanation of the s
stem. Please note that the method of
'how to pro
ram' and 'what parameters are available' for each instruction will not be discussed.
For this information please see the relevant, previous chapters.
10.2 Users of DC Powered FX Units
When usin
DC powered FX pro
rammable controllers, it is necessar
to add the followin
instructions to the be
innin
of the installed pro
ram:
Explanation:
With AC powered FX pro
rammable controllers, the power break detection period can be
ad
usted b
writin
the desired detection period to the special data re
ister D8008.
However, in the case of DC powered units this detection period must be set to 5 msec.
This is achieved b
movin
the value of -4 into D8008. Failure to do this could result in inputs
bein
missed durin
the DC power 'drop'.
M8000
MOV
K -4 D8008
Step 0
FX Series Programmable Controllers
