32 bit floating format


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Which standard is used by schneider to implement the 32 bit floating in modbus protocol? Has this procedure been recorded in document? As I need to use SUN ultra sparc to talk to Quantum PLC directly.
From the Modicon Ladder Logic Block Library (840USE10100) manual.

"...(Modicon) floating point functions require values in 32-bit IEEE floating point format. Each
value has two registers assigned to it - the eight most significant bits representing the
exponent and the other 23 bits (plus one assumed bit) representing the mantissa and the sign of
the value.
It is virtually impossible to recognize an FP representation on the programming panel..."