D-Link DE-805TP - 10Mbps Ethernet Mini Hub User Manual download pdf (Page 70)

Modbus for Field Technicians

Page 70

For example, the number 123456.00 as defined in the IEEE 754 standard for

single-precision 32-bit floating point numbers appears as follows:

The affects of various byte orderings are significant. For example, ordering

the 4 bytes of data that represent 123456.00 in a “B A D C” sequence in

known as a “byte swap”. When interpreted as an IEEE 744 floating point data

type, the result is quite different:

Ordering the same bytes in a “C D A B” sequence is known as a “word swap”.

Again, the results differ drastically from the original value of 123456.00:

1 2 ... 65 66 67 68 69 70 71 72 73 74 75 76 77

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D-Link DE-805TP - 10Mbps Ethernet Mini Hub User Manual Page 70