Omron CJ - INSTRUCTIONS REFERENCE MANUAL 07-2009 Reference Manual page 572

Function
LOGD(859) calculates the natural (base e) logarithm of the double-precision (64-bit) floating-point
number in words S to S+3 and places the result in words D to D+3.
• The constant e is 2.718282.
The following diagram shows the relationship between the input data and result.
CS/CJ/NSJ Series Instructions Reference Manual (W474)
log
S+3 S+2 S+1
e
S D+3 D+2 D+1
R
S: Input data
R: Result
3. Instructions
D
3
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