GE Industrial Solutions 6KCV301DGF - Manual (Page 39)

39 —————— Digital General Function Card ——————
6KCV301DGF
exponent (base 10) = 6 bits + sign (7 bit as complement of 2)
Sm Se 6 bit exp. Hi-byte Med-byte Low-byte
d0230g
Mantissa (3 bytes as complement of 2) Exponent
Low-Med-Hi bytes + Sm = mantissa as complement of 2 (25 bit)
Exp + Se = exponent as complement of 2 (7 bit)
2.3.1.2 SLREAL format
Characteristics:
mantissa = 15 bits + sign (16 bit as complement of 2)
exponent (base 10) = 15 bits + sign (16 bit as complement of 2)
Se Hi-byte
d0250g
15 bit exp. (*) Low-byte
HIGH WORD Exponent
LOW WORD
Mantissa (2 bytes as complement of 2)
Low-Hi bytes = mantissa as complement of 2
Exp + Se = exponent as complement of 2
(*) representation of the exponent limited to 63 by the software.
2.3.1.3 S3HREAL format
Characteristics:
mantissa = 19 bits + sign (20 bits as complement of 2)
exponent (base 10) = 3 bits + sign ( 4 bits as complement of 2)
HIGH BYTE HIGH BYTE LOW BYTE
HIGH WORD LOW WORD LOW WORD
Always 0 Se Exp SM Mantissa
15 .......................... 8 7 6 . 4 3 2 ......... 0 15 ................... 8 7 ....................... 0
Bit Number
d00260g
LOW BYTE
HIGH WORD
Exp + Se = exponent as complement of 2 (4 bit)
Mantissa + Sm = mantissa as complement of 2 (20 bit)
2.3.1.4 S3LREAL format
Characteristics:
mantissa = 1 word + sign (as complement of 2)
exponent (base 10) = 1 byte + sign (as complement of 2)
HIGH BYTE HIGH BYTE LOW BYTE
HIGH WORD LOW WORD LOW WORD
Always 0
15 .......................... 8 15 ................... 8 7 ....................... 0
Bit Number
d0270g
Exponent (*) Mantissa
7 ............................. 0
LOW BYTE
HIGH WORD
Exponent = exponent as complement of 2
Mantissa = mantissa as complement of 2
(*) representation limited to 63 by the software.