Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 748

Processing details
• These instructions convert the 32-bit signed binary data in the device specified by (s) to a single-precision real number, and
stores the real number in the device specified by (d).
SM402
M0
• A single-precision real number is processed in 32-bit single precision, and therefore the effective number of digits is 24 bits
when it is represented in binary and is about 7 digits when represented in decimal. For this reason, if the integer value
exceeds the range from -16777216 to 16777215 (24-bit binary value), an error occurs in the converted value. The operation
result is an integer value in which the 25th bit from upper bits is rounded off.
b31 ∙∙∙ b24 b23
0 0 0 0 1 1 0 1 0 0 1
b31 ∙∙∙ b24 b23
0 0 0 1 0 1 1 0 0 0 1
(1) Rounded down.
(2) Rounded off.
Operation error
There is no operation error.
7 APPLICATION INSTRUCTIONS
746
7.9 Real Number Instructions
DMOVP K-123456
(s)
DINT2FLT D0
∙∙∙ b16
b15 ∙∙∙
1 1 0 1 1
1 1 1 0 1 0 0 0 1
∙∙∙ b16 b15 ∙∙∙
1 0 1 0 1 0 1 0 0 0 0 0 1 0
(s)
D0 b31 ∙∙∙ b16
D1, D0 FFFEH
(d)
(-123456)
D100
b8b7 ∙∙∙ b0
1 0 0 1 1 1 0
(1)
(2)
b8b7 ∙∙∙ b0
1 1 1 0 1 1 1
(1)
(2)
(d)
b15 ∙∙∙ b0 b31
1DC0H D101, D100
222030032
372588928
∙∙∙ b16 b15 ∙∙∙ b0
C7F1H 2000H
(-123456.0)