529
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
20 Positioning Control – FNC150 to FNC159
20.2 FNC151 – DVIT / Interrupt Positioning
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
S
2 : When not using a special high speed output adapter in an FX
3U
PLC or when using an FX
3UC
PLC,
specify a transistor output number.
When using a special high speed output adapter in an FX
3U
PLC, specify the following output numbers.
S
3 : "D
.b" cannot be indexed with index registers (V and Z).
Explanation of function and operation
Caution on write during RUN
Avoid write during RUN while the DVIT (FNC151) instruction is executed (that is, while a pulse is output).
Note that the PLC decelerates and stops pulse output if write during RUN is executed to a circuit block
including the FNC151 instruction while pulses are output.
Function change depending on the version
The functions of FNC151 instruction are changed depending on the version as shown in the table below.
→
For explanation of the instruction and the contents of function change,
refer to the Positioning Control Edition.
Special high speed output adapter No.
Pulse output
Rotation direction output
No. 1 (1st unit)
=For Y000
Y004
=For Y001
Y005
No. 2 (2nd unit)
=For Y002
Y006
=For Y003
Y007
Applicable version
Item
Outline of function
FX
3U
FX
3UC
Ver.2.00 or
later
Ver.1.30 or
later
Interrupt input signal
specification function
When M8336 is set to ON, the interrupt input signal corresponding to
Y000 to Y003 is changed to an input number (X000 to X007)
specified by D8336.
When using a transistor output in the main unit, Y003 cannot be
specified.
Ver.2.00 or
later
Ver.2.00 or
later
User interrupt mode
When "8" is specified by D8336 to the interrupt input signal
corresponding to Y000 to Y003 and M8336 is set to ON, the interrupt
input signal is changed to a special auxiliary relay. When this
changed special auxiliary relay is set to ON from OFF in an input
interrupt program, the PLC starts the interrupt operation. When this
function is used, however, the logic of the interrupt input cannot be
inverted.
When using a transistor output in the main unit, Y003 cannot be
specified.
D
1
D
1
D
1
D
1
Command
input
FNC151
DVIT
S
2
S
1
D
1
D
2