349
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
13 High Speed Processing – FNC 50 to FNC 59
13.7 FNC 56 – SPD / Speed Detection
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
Cautions
1. Input specifications of the input
• An input device X000 to X007 specified as
cannot overlap the following usage:
- High speed counter
- Input interrupt
- Pulse catch
- DSZR instruction
- DVIT instruction
- ZRN instruction
• For one input, this instruction can be used at most only once.
• The maximum frequency of turning ON and OFF the inputs X000 to X007 is as shown below:
*1.
When receiving pulses corresponding to the response frequency of 50 k to 100 kHz, perform the
following:
-
Make sure that the wiring length is 5 m or less.
-
Connect a bleeder resistor of 1.5 k
Ω
(1 W or more) to the input terminal, and make sure that the
load current in the open collector transistor output in the counterpart equipment is 20 mA or more.
2. Occupied devices
1) In the case of 16-bit operation
Three devices are occupied from a device specified in
.
2) In the case of 32-bit operation
Six devices are occupied from a device specified in
.
Function change depending on the version
The function of FNC 56 instruction is changed depending on the version as shown in the table below.
Used input number
Maximum input frequency
FX
3UC
PLC
[FX
3UC
-32MT-LT]
FX
3U
PLC
Main unit
FX
3U
-4HSX-ADP
X000 to X005
100 kHz
*1
100 kHz
*1
200 kHz
X006,X007
10 kHz
10 kHz
Applicable version
Item
Outline of function
FX
3U
FX
3UC
Ver.2.00 or later
Ver.2.00 or later
Addition of 32-bit instruction
32-bit operations (DSPD) are enabled.
S
1
S
1
D
D