Mitsubishi Electric MELSEC FX3U Programming Manual page 267

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
2. 32-bit operation (DCML and DCMLP)
Each bit of devices specified as [
to [ +1,
D D
• When a constant (K) is specified as [
• This operation is useful when a logically inverted output is required as an output from a PLC.
Command
input
FNC 14
DCML
b31
1
S
Sign bit (0: Positive, 1: Negative)
0
D
Program examples
1. When receiving an inverted input
The sequence program shown below can be written by CML instruction.
X000
X001
X002
X003
2. When four bits are specified for a device with digit specification
X000
FNC 14
CML
Y015 b14
1
S
D 0
Sign bit (0: Positive, 1: Negative)
D
Y017 Y016 Y015 Y014 Y013 Y012 Y011 Y010 Y007 Y006 Y005 Y004 Y003 Y002 Y001 Y000
K1Y000
+1,
S
].
S
S D
b30 b29 b28 b27 b26
0 1 0 1 0
1 0 1 0 1
M 0
M 1
M 2
M 3
M8000
FNC 14
CML
RUN monitor
S D
(D 0) → (K1Y000)
D 0 K1Y000
b13 b12 b11 b11
0 1 0 1 0
Do not change.
9 Move and Compare – FNC 10 to FNC 19
] is inverted (from 0 to 1 or from 1 to 0), and then transferred
S
+1, ], it is automatically converted into binary.
S
→
S +1, S D +1,
b25 to b7 b6 n5
1 0 0 1
When command contact turns ON
0 1 1 0
Inverted data is transferred.
X000
X001
X002
X003
K1X000 K1M0
b9 b8 b7 b6 n5
1 0 1 0 1
9.5 FNC 14 – CML / Complement
D
b4 b3 b2 b1 b0
1 1 0 1 0
0 0 1 0 1
M 0
M 1
M 2
M 3
b4 b3 b2 b1 b0
0 1 0 1 0
X000 = ON
0 1 0 1
Inverted data is
transferred.
1
2
3
4
5
6
7
8
9
10
265