Mitsubishi MELSEC Q Series Programming Manual page 672

LOGD(P)
Program Example
(1) 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]
Step
[Operation]
10
7-298
Instruction Device
2 Conversion to
D50
1
b15 b0 floating-point
10
MOV BIN value FLTD
Sets data used for natural logarithm
operation ( ).
1
Converts the operation data into a 64-bit
floating-point real number (
2
Executes natural logarithm operation (
D43 D42 D41 D40
LOG operation
3
10
LOGD
64-bit floating-point
real number
).
).
3
D33 D32 D31 D30
2.302585
64-bit floating-point
real number