Mitsubishi Electronics FX3G User Manual
323
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
12 Data Operation – FNC 40 to FNC 49
12.3 FNC 42 – ENCO / Encode
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
12.3
FNC 42 – ENCO / Encode
Outline
This instruction obtains positions in which bits are ON in data.
1. Instruction format
2. Set data
3. Applicable devices
S1: This function is supported only in FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLCs.
S2: This function is supported only in FX
3U
/FX
3UC
PLCs.
Explanation of function and operation
1. 16-bit operation (ENCO and ENCOP)
The 2
n
bit of
is encoded, and the result value is stored to
.
This instruction converts data into binary data according to a bit position in the ON status.
1) When
is a bit device (1
≤ n ≤ 8)
ON bit positions among "2
n
" bits (1
≤ n ≤ 8) from
are encoded to
.
-When "n" is "8", 2
8
= 256 bits (which is the maximum value) are occupied.
-The encoding result of
is "0" (OFF) from the most significant bit to the low-order bit "n".
Operand type
Description
Data type
Data to be encoded or word device number storing data
16-bit binary
Word device number storing the encoding result
16-bit binary
n
Number of bits of device storing the encoding result (n = 1 to 8)
(When "n" is "0", no processing is executed.)
(When "n" is "0", no processing is executed.)
16-bit binary
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D .b KnX KnY KnM KnS T C D
R U \G
V Z Modify K H
E
" "
P
S1
S2
S1
S2
n
P
FNC 42
ENCO
−
−
−
Mnemonic
Operation Condition
16-bit Instruction
7 steps ENCO
ENCOP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
32-bit Instruction
S
1
S
D
S
1
S
S
2
D
D
1
S
D
1
D
D
1
S
D
1
S
D
1
D
D
1
D
Command
input
FNC 42
ENCO
n
S
D
When it is Y, M or S
(1
≤ n ≤ 8)
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
b15
D10
(1)
(2)
4
All of them are "0".
b0
7
0
0
0
0
1
0
0
0
0
0
1
2
(3)
4
5
6
M17
M16
M15 M14
M13
M12
M11 M10
When "n" is 3
S
= M10
D