Mitsubishi Electronics FX3G User Manual
320
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
12.2 FNC 41 – DECO / Decode
12.2
FNC 41 – DECO / Decode
Outline
This instruction converts numeric data into ON bit.
A bit number which is set to ON by this instruction indicates a numeric value.
A bit number which is set to ON by this instruction indicates a numeric value.
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 (DECO and DECOP)
One bit among
to
+2
n
− 1 is set to ON according to the
value.
1) When
is a bit device (1
≤ n ≤ 8)
The numeric value (expressed in 2
n
, 1
≤ n ≤ 8) of a device specified by
is decoded to
.
-When all bits of
are "0", the bit device
turns ON.
-When "n" is "8", 2
8
points (= 256 bits which is the maximum value) are occupied.
Operand type
Description
Data type
Data to be decoded or word device number storing data
16-bit binary
Bit or word device number storing the decoding result
16-bit binary
n
Number of bits of device storing the decoding result (n = 1 to 8)
(No processing is executed in the case of "n = 0".)
(No processing is executed in the case of "n = 0".)
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 41
DECO
−
−
−
Mnemonic
Operation Condition
16-bit Instruction
7 steps DECO
DECOP
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
D
D
1
D
D
1
S
D
1
D
D
1
S
D
1
D
D
1
S
D
1
D
When is M0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
← n
D
Up to 256 bits (The number of occupied bits varies depending on the specified "n" value.)
Up to
M31
Up to
M63
Up to
M127
Up to
M255
…
…
…
K1
K2
K3
K4
K5
K6
K7
K8
Turns ON when all
bits of are OFF.
bits of are OFF.
0 0 0 0 1 1 1 0
1
2
4
8
16
32
64
128
← 2
n
S
8 bits
b0
b1
b2
b3
b4
b5
b6
b7
M255
M0
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
M11
M12
M13
M14
M15
b8
b9
b10
b11
b12
b13
b14
b15
When is D0
When it is Y, M or S
(1
≤ n ≤ 8)
Command
input
FNC 41
DECO
S
D
n
Ignored
When "n" is "8"
S