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Special Math Instructions Section 3-13
3-13-4 FLOATING POINT DIVIDE: FDIV(079)
Purpose Divides one 7-digit floating-point number by another. The floating-point num-
bers are expressed in scientific notation (7-digit mantissa and 1-digit expo-
nent).
Ladder Symbol
Variations
Applicable Program Areas
Operand Specifications
Description FDIV(079) divides the floating-point value in Dd and Dd+1 by that in Dr and
Dr+1 and places the result in R and R+1.
FDIV(079)
R
Dd
Dr
Dd: First dividend word
Dr: First divisor word
R: First result word
Variations Executed Each Cycle for ON Condition FDIV(079)
Executed Once for Upward Differentiation @FDIV(079)
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 Dd Dr 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 ---
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
R+1 R
Quotient
Dr+1 Dr Dd+1 Dd
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