Mitsubishi Electronics FX3G User Manual
555
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
20 Positioning Control – FNC150 to FNC159
20.5 FNC156 – ZRN / Zero Return
11
FN
C30
-FN
C3
C30
-FN
C3
9
R
ota
tion and
Shi
ft
ft
12
FN
C40-FN
C40-FN
C49
D
ata O
perati
perati
on
13
FNC
50-FNC
59
High-Speed
Proc
essing
14
FM
C60-FN
C60-FN
C69
H
andy
In
struction
15
FN
C70-FN
C70-FN
C79
E
xternal
F
X
I/O
De
vice
16
FNC
80-FNC
89
External
FX
Dev
ice
ice
17
FNC1
00-
FNC10
00-
FNC10
9
Dat
a
a
Transfer 2
18
FNC1
10-
FNC139
FNC139
Fl
oati
ng Poi
nt
19
FNC14
0-F
N
C
149
Da
ta
Operation 2
20
FNC1
50-
FNC159
FNC159
Pos
itioning
itioning
Control
Explanation of function and operation
Caution on writing during RUN
During RUN, avoid writing while the ZRN (FNC156) instruction is executed (that is, while pulses are output).
Note that if writing is executed during RUN to a circuit block including the FNC156 instruction while pulses are output,
the PLC decelerates and stops pulse output.
Note that if writing is executed during RUN to a circuit block including the FNC156 instruction while pulses are output,
the PLC decelerates and stops pulse 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
3S
FX
3G
FX
3GC
FX
3U
FX
3UC
Ver. 1.00
or later
Ver. 1.00
or later
Ver. 1.40
or later
Ver. 2.20
or later
Ver. 2.20
or later
Clear signal output
destination
specification function
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
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