663
Double-precision Floating-point Instructions (CS1-H, CJ1-H, CJ1M, or CS1D Only) Section 3-16
Flags
Precautions The result will not be exact if a number with an absolute value greater than
16,777,215 (the maximum value that can be expressed in 24-bits) is con-
verted.
3-16-5 DOUBLE FLOATING-POINT ADD: +D(845)
Purpose Adds two double-precision (64-bit) floating-point numbers and places the
result in the specified destination words.
This instruction is supported by CS1-H, CJ1-H, CJ1M, and CS1D CPU Units
only.
Ladder Symbol
Variations
Applicable Program Areas
Operand Specifications
Name Label Operation
Error Flag ER OFF
Equals Flag = ON if both the exponent and mantissa of the result are 0.
OFF in all other cases.
Negative Flag N ON if the result is negative.
OFF in all other cases.
+D(845)
D
Au
Ad
Au: First augend word
Ad: First addend word
D: First destination word
Variations Executed Each Cycle for ON Condition +D(845)
Executed Once for Upward Differentiation @+D(845)
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 Au Ad D
CIO Area CIO 0000 to CIO 6140
Work Area W000 to W508
Holding Bit Area H000 to H508
Auxiliary Bit Area A000 to A956 A448 to A956
Timer Area T0000 to T4092
Counter Area C0000 to C4092
DM Area D00000 to D32764
EM Area without bank E00000 to E32764
EM Area with bank En_00000 to En_32764
(n = 0 to C)
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
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