Calculating The Natural Logarithm Of Single-Precision Real Number - Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual

Calculating the natural logarithm of single-precision real number

LOG(P)/DLOGE(P)
These instructions calculate the logarithm whose base is natural logarithm e of a value specified by (s), and store the
operation result in the device specified by (d).
The LOG(P) instructions can also be used as DLOGE(P).
Ladder diagram
(s) (d)
*1
FBD/LD
EN ENO
s d
*1 The LOG instruction is not supported by the ST language and the FBD/LD language. Use LOG of the standard function.
Page 978 LOG(_E)
Setting data
■Descriptions, ranges, and data types
Operand Description
(s) Data whose natural logarithm is calculated or head device
number where the data is stored
(d) Head device number for storing the operation result
EN Execution condition
ENO Execution result
■Applicable devices
Operand Bit
X, Y, M, L, SM,
F, B, SB, S
(s) 

(d)
Word
T, ST, C, D, W, U\G
SD, SW, R
 
 
*1
Structured text
ENO:=LOGP(EN,s,d);
Range Data type
 Single-precision real number

Single-precision real number

Bit

Bit
Double word Indirect
specification
Z LC LZ
   
   
Data type (label)
ANYREAL_32
ANYREAL_32
BOOL
BOOL
Constant Others
K, H E $
   
   
8 APPLICATION INSTRUCTION
8.9 Real Number Instruction
8
535