FX Series Programmable Controlers Applied Instructions 5
5-55
f) Because this instruction uses a series of
multiplexed si
nals it requires a certain amount of
‘hard wirin
’ to operate. The example wirin
dia
ram to the ri
ht depicts the circuit used if the
previous example instruction was pro
rammed. As
a
eneral precaution to aid successful operation
diodes should be places after each input device
(see dia
ram opposite). These should have a
ratin
of 0.1A, 50V.
)
Example Operation
When output Y20 is ON onl
those inputs in the
first bank are read. These results are then stored;
in this example, auxiliar
coils M30 to M37. The
second step involves Y20
oin
OFF and Y21
comin
ON. This time onl
inputs in the second
bank are read. These results are stored in devices
M40 to M47. The last step of this example has Y21
oin
OFF and Y22 comin
ON. This then allows all of the inputs in the third bank to be
read and stored in devices M50 to M57. The processin
of this instruction example would
take 20
×
3 = 60msec.
5.6.4 HSCS (FNC 53)
Operation:
The HSCS set, compares the current value of the
selected hi
h speed counter (S
2
)a
ainst a selected
value (S
1
). When the counters current value
chan
es to a value equal to S
1
the device specified
as the destination (D)is set ON.The example above shows that Y10 would be set ON onl
when C255’s value stepped from 99-100 OR 101-100. If the counters current value was forced
to equal 100, output Y10 would
NOT
be set ON.
Points to note:
a) It is recommended that the drive input used for the hi
h speed counter functions; HSCS,
HSCR, HSCZ is the special auxiliar
RUN contact M8000.
Mnemonic Function
Operands
Program steps
S
1
S
2
n
HSCS
FNC 53
(
Hi
h
speed
counter set)
Sets the selected
output when the
specified hi
h
speed counter
value equals the
test value
K, H,
KnX, KnY,
KnM, KnS,
T, C, D, V, Z
C
Note:
C = 235 to 254,
or available
hi
h speed
counters
Y, M, S
Interrupt point-
ers
I010 to I060
can be set on
FX units from
CPU ver 3.07
and F
X2C
units
DHSCS:
13 steps
X10X11X12X13X14X15X16X1724V 0V S/S
Y22Y23Y24Y25Y26Y27+V Y20Y21
3.
2.
1.
0,1 A
50 V
Diode
Input
devices
Transistor output unit
(source)
Notice how the resultin
matrix-table does not use an
of the
P
8 and
P
9 bit devices when
state S or auxiliar
M rela
s are used as the stora
e medium.
M8000
C255 Y10
[ S1 ] [ S2 ]
K100
[ D ]
DHSCS
