Double Exponent: Expd(858) - Omron SYSMAC CJ - REFERENCE MANUAL 01-2008 Reference Manual

Double-precision Floating-point Instructions (CS1-H, CJ1-H, CJ1M, or CS1D Only)
Flags
Precautions

3-16-18 DOUBLE EXPONENT: EXPD(858)

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 source data in words S to S+3 must be in IEEE754 floating-point data for-
mat.
Calculates the natural (base e) exponential of a double-precision (64-bit) float-
ing-point number and places the result in the specified result words.
This instruction is supported by CS1-H, CJ1-H, CJ1M, and CS1D CPU Units
only.
EXPD(858)
S: First source word
S
D: First destination word
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
EM Area without bank
EM Area with bank
Operation
ON if the source data is not recognized as floating-point
data.
ON if the source data is negative.
ON if the source data is not a number (NaN).
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 (64-bit) floating-point
value.
Unchanged
Unchanged
Step program areas Subroutines
OK
S
CIO 0000 to CIO 6140
W000 to W508
H000 to H508
A000 to A956
T0000 to T4092
C0000 to C4092
D00000 to D32764
E00000 to E32764
En_00000 to En_32764
(n = 0 to C)
Section 3-16
EXPD(858)
@EXPD(858)
Not supported.
Interrupt tasks
OK
D
A448 to A956
689