535
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
20 Positioning Control – FNC150 to FNC159
20.6 FNC157 – PLSV / Variable Speed Pulse Output
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 PLSV (FNC157) instruction is executed (that is, while pulses are output).
Note that the PLC executes the operation shown below if write during RUN is executed to a circuit block
including FNC157 instruction while pulses are output.
*1.
Supported in Ver.2.00 or later
Function change depending on the version
The function of the FNC157 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.
PLC operation when write during RUN is executed while
instruction is executed
During operation with acceleration/deceleration
*1
Decelerates and stops pulse output.
During operation without acceleration/deceleration Immediately stops pulse output.
Applicable version
Item
Outline of function
FX
3U
FX
3UC
Ver.2.00 or
later
Ver.2.00 or
later
Acceleration/
deceleration
operation function
When M8338 is set to ON, the PLC accelerates or decelerates up to
in the acceleration or deceleration time corresponding to
if
changes.
Command
input
FNC157
PLSV
S
D
1
D
2
S
1
D
1
S
1
