Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual page 707

Double-precision Floating-point Instructions (CS1-H, CJ1-H, CJ1M, or CS1D Only)
Flags
Precautions
3-16-7 DOUBLE FLOATING-POINT MULTIPLY: *D(847)
Purpose
Ladder Symbol
Variations
Applicable Program Areas
Operand Specifications
Name Label
Error Flag ER
Equals Flag =
Overflow Flag OF
Underflow Flag UF
Negative Flag N
The Minuend (Mi to Mi+3) and Subtrahend (Su to Su+3) data must be in
IEEE754 floating-point data format.
Multiplies two double-precision (64-bit) floating-point numbers and places the
result in the specified result words.
This instruction is supported by CS1-H, CJ1-H, CJ1M, and CS1D CPU Units
only.
*D(847)
Md: First Multiplicand word
Md
Mr: First Multiplier word
D: First destination word
Mr
D
Variations Executed Each Cycle for ON Condition
Executed Once for Upward Differentiation
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification
Block program areas
OK OK
Area
CIO Area
Work Area
Holding Bit Area
Auxiliary Bit Area
Timer Area
Counter Area
DM Area
Operation
ON if the minuend or subtrahend data is not recognized
as floating-point data.
ON if the minuend or subtrahend is not a number (NaN).
ON if + is subtracted from + .
ON if – is subtracted from – .
OFF in all other cases.
ON if both the exponent and mantissa of the result are 0.
OFF in all other cases.
ON if the absolute value of the result is too large to be
expressed as a double-precision floating-point value.
ON if the absolute value of the result is too small to be
expressed as a double-precision floating-point value.
ON if the result is negative.
OFF in all other cases.
Step program areas Subroutines
OK
Md
CIO 0000 to CIO 6140
W000 to W508
H000 to H508
A000 to A956
T0000 to T4092
C0000 to C4092
D00000 to D32764
Section 3-16
*D(847)
@*D(847)
Not supported.
Interrupt tasks
OK
Mr D
A448 to A956
667