533
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
20 Positioning Control – FNC150 to FNC159
20.5 FNC156 – ZRN / Zero Return
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
Explanation of function and operation
Caution on write during RUN
Avoid write during RUN while the ZRN (FNC156) instruction is executed (that is, while pulses are output).
Note that the PLC decelerates and stops pulse output if write during RUN is executed to a circuit block
including the FNC156 instruction while pulses are output.
Function change depending on the version
The function of FNC156 instruction is 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.
Applicable version
Item
Outline of function
FX
3U
FX
3UC
Ver.2.00 or
later
Ver.2.00 or
later
Clear signal output
destination
specification function
When a special auxiliary relay corresponding to
is set to ON,
the clear signal output destination is changed to an output number
specified by a special data register corresponding to
.
Command
input
FNC156
ZRN
S
1
S
2
S
3
D
D
D
Содержание FX3U Series
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