Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 838

Processing details
• These instructions calculate the common logarithm (using 10 as the base) of the value specified by (s), and store the
operation result in the device number specified by (d).
log10 ( (s)+1 (s)
Single-precision real number
• The value specified by (s) must be positive. (No negative value can be calculated.)
• If the operation result is -0 or an underflow occurs, the operation result turns out to 0.
• When an input value is set using the engineering tool, a rounding error may occur. Refer to the following for the precautions
on setting input values using the engineering tool.
Page 49 Precautions
Operation error
Error code Description
(SD0)
The value input to (s) is -0, a subnormal number, NaN (not a number), or .
3402H
3405H An out-of-range value is set to (s).
• The specified value is a negative number.
• The specified value is 0.
7 APPLICATION INSTRUCTIONS
836
7.9 Real Number Instructions
) (d)+1
Single-precision real number
(d)