Mitsubishi Electronics FX3G User Manual
508
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
Series
Programming Manual - Basic & Applied Instruction Edition
18 Floating Point – FNC110 to FNC139
18.11 FNC123 – EDIV / Floating Point Division
18.11 FNC123 – EDIV / Floating Point Division
Outline
This instruction executes division of two binary floating point.
→ 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 (DEDIV and DESDIVP)
Binary floating point data [
+1,
] is divided by binary floating point data [
+1,
], and the division
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.
Operand Type
Description
Data Type
Word device number storing binary floating point data used in division
Real number (binary)
*1
Word device number storing binary floating point data used in division
Data register number storing binary floating point data obtained by division
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 123
EDIV
D
−
Mnemonic
Operation Condition
16-bit Instruction
DEDIV
DEDIVP
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
1
S
1
S
2
S
2
D
D
Command
input
FNC123
DEDIV
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
Dividend
Divisor
S
1
S
1
S
2
S
2
Command
input
FNC123
DEDIV
K100
S
1
D
[ +1, ]
÷ [ K100 ] → [ +1, ]
Binary floating point
Automatically
converted into binary
floating point
Binary floating point
S
1
S
1
D
D
Dividend
Divisor