ICP DAS USA PM-3133i-MTCP, Руководство пользователя

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PM
-
3133i User
’s Manual v1.02
Last Revised: Apr. 2023 Page: 22
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IEEE 754 Format
Definition of the floating format of the Bits
Data Hi Word
，
Hi Byte
Data Hi Word
，
Lo Byte
Data Lo Word
，
Hi Byte
Data Lo Word
，
Lo Byte
SEEE EEEE EMMM MMMM MMMM MMMM MMMM MMMM
Value = (- 1)
S
x (1.M) x 2
E - 127
0 < E < 255
S represents the sign bit where 1 is negative and 0 is positive
E
is the two’s complement exponent with an offset of 127.
i.e. an exponent of zero is represented by 127, an exponent of 1 by 128 etc.
M is the 23-bit normal mantissa. The highest bit is always 1 and,
therefore, is not stored.
Transfer sequence
(Float)
1 2 3 4
Data Low Word
，
High Byte
Data Low Word
，
Low Byte
Data High Word
，
High Byte
Data High Word
，
Low Byte
Transfer sequence
(Inverse Integer
)
1 2 3 4
Data High Word
，
High Byte
Data High Word
，
Low Byte
Data Low Word
，
High Byte
Data Low Word
，
Low Byte
Transfer sequence
(Integer
)
1 2 3 4
Data Low Word
，
High Byte
Data Low Word
，
Low Byte
Data High Word
，
High Byte
Data High Word
，
Low Byte