FX Series Programmable Controlers Applied Instructions 5
5-87
5.8.6 ARWS (FNC 75)
Operation:
This instruction displa
s the contents of a sin
le
data device D
1
on a set of 4 di
it, seven se
ment
displa
s. The data within D
1
is actuall
in a
standard decimal format but is automaticall
converted to BCD for displa
on the seven
se
ment units. Each di
it of the displa
ed number can be selected and edited. The editin
procedure directl
chan
es the value of the device specified as D
1
.
Points to note:
a) The data stored in destination device D
1
can have a
value from the ran
e 0 to 9,999 (decimal), i.e. 4 di
it
data. Each di
its data value, can be incremented (S
+1
)
or decremented (S
+0
) b
pressin
the associated control
ke
s. The edited numbers automaticall
‘wrap-around’
from 9 - 0 - 1 and 1 -0 - 9. The di
it data is displa
ed b
the lower 4 devices from D
2
, i.e. D
2+0
to D
2+3
.
b) On initial activation of the ARWS instruction,
the di
it in the numeric position 10
3
is currentl
selected. Each di
it position can be
sequentiall
‘cursored throu
h’ b
movin
to
the left (S
+2
) or to the ri
ht (S
+3
). When the last
di
it is reached, the ARWS instruction
automaticall
wraps the cursor position
around, i.e. after position 10
3
, position 10
0
is
selected and vice-versa. Each di
it is
ph
sicall
selected b
a different ‘strobe’
output.
c) To aid the user of an operation panel controlled with the ARWS instruction, additional lamps
could be wired in parallel with the strobe outputs for each di
it. This would indicate which
di
it was currentl
selected for editin
.
d) The parameter n has the same function as parameter n of the SEGL instruction - please
seepa
e5-86, ‘Selectin
thecorrectvalueforoperand n‘. Note: as the ARWS instruction onl
controls one set of displa
s onl
values of 0 to 3 are valid for n.
e) The ARWS instruction can be used
ONCE
. This instruction should onl
be used on
transistor output PLC’s.
Mnemonic Function
Operands
Program steps
S
D
1
D
2
n
ARWS
FNC 75
(Arrow
switch)
Creates a user
defined, (4 ke
)
numeric data
entr
panel
X, Y, M, S
Note:
uses 4
consecu-
tive
devices
T, C, D, V, Z
Note: data
is stored in
a decimal
format
Y
Note:
uses 8
consecu-
tive
devices
K, H
Note:
n= 0 to 3,
ARWS:
9 steps
X0
D 0 Y 0
[ D2 ]
K 0
ARWS
[ D1 ]
X 10
[ S ]
[ n ]
X10
X11
X12X13
Cursor
left (S
+3
)
Cursor
right (S
+2
)
Increase digit value (S
+1
)
Decrease digit value (S
+0
)
10101010
3012
Y0
Y1
Y2
Y3
1
2
4
8
Y4
Y5
Y6
Y7
Additional
indicator lamps
-see point c.
Digit
position
