AH500 Programming Manual
6-80
API
Instruction code
Operand Function
0203 D FLTD P
S, D
Converting the binary integer into
the 64-bit floating-point number
Device
X Y M S T C HC D L SM SR E PR K 16# “$” DF
Pulse instruction
16-bit instruction (5 steps)
32-bit instruction (5 steps)
Symbol:
S
：
Source device Word/Double word
D
：
Conversion result Long word
Explanation:
1. When the instruction is executed, the binary integer is converted into the double-precision
floating-point number.
2. The operand S used in the instruction FLTD can not be the 32-bit counter.
3. The source device S used in the instruction FLTD occupies one register, and D used in FLTD
occupies four registers.
4. The source device S used in the instruction DFLTD occupies two registers, and D used in
DFLTD occupies four registers.
5. When the absolute value of the conversion result is larger than the value which can be
represented by the maximum floating-point number, SM602 is ON, and the maximum
floating-point number is stored in D.
6. When the absolute value of the conversion result is less than the value which can be
represented by the minimum floating-point number, SM601 is ON, and the minimum
floating-point number is stored in D.
7. When the conversion result is zero, SM600 is ON.
Example:
1. When X0.0 is ON, the 16-bit binary integer in D0 is converted into the
double-precision
floating-point number, and the conversion result is stored in (D15, D14, D13, D12).
2. When X0.1 is ON, the 32-bit binary integer in (D1, D0) is converted into the
double-precision
floating-point number, and the conversion result is stored in (D23, D22, D21, D20).
3. Suppose the 16-bit binary integer in D0 is 10. When X0.0 is ON, 10 is converted into
16#4024000000000000, and 16#4024000000000000 is stored in the 64-bit register (D15, D14,
D13, D12).
4. Suppose the 32-bit binary integer in (D1, D0) is 100,000. When X0.1 is ON, 100,000 is
converted into 16#40F86A0000000000, and 16#40F86A0000000000 is stored in the 64-bit
register (D23, D22, D21, D20).
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