fIEEEtoW [D>=21]

Converts the data in W from big endian IEEE754 floating point format to SPLat floating point format. This is used when transferring floating point data from a 3rd party device, say an HMI, to the SPLat.

Explanation: The floating point format adopted in SPLat is a special format designed to be more efficient for implementation in an 8-bit processor. It keeps mantissa and exponent in separate bytes, whereas in IEEE they cross byte boundaries.

A typical use scenario would be that you are using ModBus to transfer a floating point number from an external 3rd party HMI to the SPLat. The number winds up in 4 bytes of SPLat RAM, but is in IEEE format. To convert to SPLat format for further use you get it into W using fRecallW then you use fIEEEtoW.

Dialect restriction: Available only in boards with dialect 21 or greater.