Mitsubishi Electric MELSEC-Q/L - Page 643

7 APPLICATION INSTRUCTIONS
7.12 Special Function Instructions
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7
Program example
• The following program seeks the natural logarithm of the value "10" set by D50, and stores the result at D30 to D33.
[Ladder Mode]
[List Mode]
[Operation]
Sets data used for natural logarithm
operation ( ).
Converts the operation data into a 64-bit
floating-point real number ( ).
Executes natural logarithm operation ( ).
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Step Instruction Device
10
64-bit floating-point
real number
64-bit floating-point
real number
D50
MOV
b15 b0
BIN value
10
Conversion to
floating-point
FLTD
LOG operation
LOGD
D41
10
D40D43 D42
D31
2.302585
D30D33 D32
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