Справочник Пользователя для Mitsubishi Electronics FX3G
505
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.8 FNC120 – EADD / Floating Point Addition
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
18.8
FNC120 – EADD / Floating Point Addition
Outline
This instruction executes addition of two binary floating point data.
→ For program examples of floating point operations, refer to Section 12.10.
→ For handling of floating point, refer to Subsection 5.1.3.
→ For flag operations, refer to Subsection 6.5.2.
1. Instruction format
2. Set data
*1.
When a constant (K or H) is specified, it is automatically converted into binary floating point (real number)
when the instruction is executed.
when the instruction is executed.
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. 32-bit operation (DEADD and DEADDP)
Binary floating point data [
+1,
] is added to binary floating point data [
+1,
], and the addition
result in the binary floating point format is transferred to [
+1,
].
When a constant (K or H) is specified as [
+1,
] or [
+1,
], it is automatically converted into
binary floating point.
Caution
1. When the same device is specified
The same device number can be specified in [
+1,
],[
+1,
] and [
+1,
].
In this case, note that the addition result changes in every operation cycle when the continuous operation type
instruction (DEADD) is used.
instruction (DEADD) is used.
Operand Type
Description
Data Type
Word device number storing binary floating point data used in addition
Real number
(
binary
)
*1
Word device number storing binary floating point data used in addition
Data register number storing the addition result
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
S1
S2
P
FNC 120
EADD
D
−
Mnemonic
Operation Condition
16-bit Instruction
DEADD
DEADDP
Mnemonic
Operation Condition
32-bit Instruction
13 steps
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
S
1
S
2
D
S
1
S
2
D
S
2
S
2
S
1
S
1
D
D
FNC120
DEADD
Command
input
S
1
S
2
D
[ +1, ] + [ +1, ]
→ [ +1, ]
Binary floating point
Binary floating point
Binary floating point
S
1
S
1
S
2
S
2
D
D
S
1
S
1
S
2
S
2
FNC120
DEADD
Command
input
S
1
S
2
D
[ +1, ] + [ K2346 ]
→ [ +1, ]
Binary floating point
Automatically
converted into binary
floating point
Binary floating point
S
1
S
1
D
D
S
1
S
1
S
2
S
2
D
D