319
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
13 High Speed Processing – FNC 50 to FNC 59
13.1 FNC 50 – REF / Refresh
11
FN
C30-
FN
C39
R
o
ta
tion and
Sh
ift
12
FNC
4
0
-FNC49
D
a
ta
Op
e
ra
tio
n
13
FNC5
0
-FNC5
9
H
igh Speed
Pr
ocessi
ng
14
FM
C6
0
-F
NC6
9
H
and
y
In
st
ru
cti
o
n
15
FNC7
0
-FNC7
9
Ex
te
rn
a
l F
X
I
/O
D
evi
ce
16
FNC8
0
-FNC8
9
Ext
e
rnal
FX
D
evi
ce
17
F
N
C1
00
-F
NC
10
9
Da
ta
Tr
ansf
e
r 2
18
FN
C
110-FN
C
13
9
Fl
oat
ing P
o
in
t
19
FN
C
140-FN
C
149
Da
ta
O
per
at
io
n
2
20
FN
C
15
0-F
N
C
159
P
o
si
tioni
ng
C
ont
ro
l
13.1.1
What should be understood before using REF instruction
1. Changing the input filter
The input filter value is determined by the contents (initial value: 10 ms) of D8020.
When setting a smaller value to the input filter, change the contents of D8020 by MOV instruction, etc.
Target range: X000 to X017 (In inputs X020 and later, the input filter value is fixed to 10 ms and cannot
be changed.)
The above range changes according to the main unit and may be reduced depending on the number of built-
in inputs.
(The target range is X000 to X007 in the FX
3U
-16M
.)
2. Output response time
After REF instruction is executed, the output (Y) sets the output signal to ON after the response time shown
below.
→
For the details, refer to the Hardware Manual of the main unit.
Target range: Y000 to final connected output number
1) In the case of relay output type
The output contact is activated after the response time of the output relay.
- Y000 and later: Approximately 10 ms
2) In the case of transistor output type
- Y000, Y001, Y002 and Y003: 5
µ
s or less (load current = 10 mA or more, 5 to 24V DC)
- Y004 and later: 0.2 ms or less (load current = 100 mA, 24V DC)
3. When using REF instruction between FOR and NEXT instructions or between a label (in a
step of a smaller number) and CJ instruction (in a step of a larger number)
When the input information or immediate output is required even in the middle of a routine program during
control, inputs or outputs can be refreshed inside the routine program.
4. When using the input interrupt (I) function
When executing the interrupt processing accompanied by I/O operations, I/O refresh can be executed in the
interrupt routine to receive the latest input (X) information and give the immediate output (Y) of the operation
result so that dispersion caused by the operation time is improved.
