488
Floating-point Math Instructions Section 3-14
Precautions The Minuend (Mi+1 and Mi) and Subtrahend (Su+1 and Su) data must be in
IEEE754 floating-point data format.
3-14-7 FLOATING-POINT MULTIPLY: *F(456)
Purpose Multiplies two 32-bit floating-point numbers and places the result in the speci-
fied result words.
Ladder Symbol
Variations
Applicable Program Areas
Operand Specifications
*F(456)
R
Md
Mr
Md: First Multiplicand word
Mr: First Multiplier word
R: First result word
Variations Executed Each Cycle for ON Condition *F(456)
Executed Once for Upward Differentiation @*F(456)
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification Not supported.
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
Area Md Mr R
CIO Area CIO 0 to CIO 6142
Work Area W0 to W510
Holding Bit Area H0 to H510
Auxiliary Bit Area A0 to A958 A448 to A958
Timer Area T0000 to T4094
Counter Area C0000 to C4094
DM Area D0 to D32766
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
Constants #00000000 to #FFFFFFFF (binary) ---
Data Registers ---
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
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