Mitsubishi Electric MELSEC FX3U Programming Manual page 354

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Program example
1. Arithmetic operations by binary floating point operations
The sequence program shown below is constructed as follows:
1) Calculation example
(D 0)
16-bit binary
(1)
(D 21, D 20)
Binary floating
point operation
2) Sequence program
M8000
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
352
÷
(X017 to X010)
2-digit BCD
(2) (5)
(D 22)
BIN
point operation
(3)
(D 25, D 24)
Binary floating
point operation
(D 29, D 28)
Binary floating
point operation
FNC 49
D 0 D 20
FLT
FNC 19
K2X010 D 22
BIN
FNC 49
D 22 D 24
FLT
FNC 123
K345 K 10
DEDIV
FNC 123
D 20 D 24
DEDIV
FNC 122
D 28 D 26
DEMUL
FNC 118
D 10 D 12
DEBCD
FNC 129
D 10 D 14
DINT
12.10 FNC 49 – FLT / Conversion to Floating Point
× K34.5
(D 11, D 10) Binary floating point
(6)
(4)
(D 27, D 26)
Binary floating
(D 0) → (D21, D20)
BIN Binary floating point operation
(X017 to X010) → (D22)
BCD
(D22) → (D25, D24)
BIN Binary floating point operation
K345 ÷ K 10 → (D27, D26)
D 26
(D21, D20) ÷ (D25, D24) → (D29, D28)
D 28 Binary floating point
division
(D29, D28) × (D27, D26) → (D11, D10)
D 10
Binary floating point multiplication
(D11, D10)
Binary floating
point operation
(D11, D10)
Binary floating
point operation
12 Data Operation – FNC 40 to FNC 49
operation
(7)
(D 13, D 12)
Scientific notation operation
for monitoring
(8)
(D 15, D 14)
32-bit binary integer
BIN
Binary floating point operation
Binary floating point
operation
→ (D13, D12)
Scientific notation operation
for monitoring
→ (D15, D14)
32-bit binary integer