393
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
14 Handy Instruction – FNC 60 to FNC 69
14.9 FNC 68 – ROTC / Rotary Table Control
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
Operation conditions
The conditions required to use this instruction are as shown in the example below.
1) Rotation detection signal: X
→
- Provide a 2-phase switch (X000 and X001) for detecting the rotation direction (forward or backward) of
the table and the switch X002 which turns ON when the product No. 0 reaches the port No. 0.
- Create the sequence program shown below.
2) Specification of a register for counting:
The counter
detects which number of product is located at the port No. 0.
3) Registers specifying the calling condition:
+1 and
+2
a) Set the port No. to be called in
+1.
b) Set the product No. to be called in
+2.
4) Number of divisions m1 and number of low-speed sections m2
Specify the number of divisions m1 of the table, and number of low-speed sections m2.
When the above conditions are specified, forward/backward rotation and high speed/low speed/stop are
output to
+3 to
+7 specified by the head device
.
Cautions
1. Operations caused by the command input ON/OFF status
• When the command input is set to ON and this instruction is executed, the result will be automatically
output to
+3 to
+7.
• When the command input is set to OFF,
+3 to
+7 are set to OFF accordingly.
2. Multiple activation of the rotation detection signal (
to
+2) in one division
For example, when the rotation detection signal (
to
+2) is activated 10 times in one division, set a
value multiplied by "10" to each division, port No. to be called and product No. to be called.
As a result, an intermediate value of the division number can be set to a low-speed section.
3. Zero point detection signal
When the zero point detection signal (M2) turns ON while the command input is ON, the contents of the
register for counting
are cleared to "0".
This clear operation should be executed before starting the operation.
D
1
D
X000
M0
X001
M1
X002
M2
D
D
D
+1
+2
X000 to X002 are replaced with internal contacts of to +2.
An arbitrary head device number can be specified by X or .
D
D
D
Zero point detection switch
2-phase switch
B
phase
A
phase
Up-counting signal during forward rotation
D
1
S
D
1
S
D
1
S
D
1
S
D
1
S
D
1
S
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
S
