507
Floating-point Math Instructions Section 3-14
Flags
Precautions The source data in S+1 and S must be in IEEE754 floating-point data format.
3-14-18 EXPONENT: EXP(467)
Purpose Calculates the natural (base e) exponential of a 32-bit floating-point number
and places the result in the specified result words.
Ladder Symbol
Variations
Applicable Program Areas
Operand Specifications
Name Label Operation
Error Flag ER 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.
Equals Flag = ON if both the exponent and mantissa of the result are 0.
OFF in all other cases.
Overflow Flag OF ON if the absolute value of the result is too large to be
expressed as a 32-bit floating-point value.
Underflow Flag UF OFF
Negative Flag N OFF
EXP(467)
S
R
S: First source word
R: First result word
Variations Executed Each Cycle for ON Condition EXP(467)
Executed Once for Upward Differentiation @EXP(467)
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 S 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 4094
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 ---
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