480
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.8 FNC120 – EADD / Floating Point Addition
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.
3. Applicable devices
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 a same device is specified
A 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.
Operand Type
Description
Data Type
Word device number storing binary floating point data used in addition
Real number
*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
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
3 3
3
3
3 3
3
3 3
3
3
3 3
3
3 3
3
3
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)
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