8 APPLICATION INSTRUCTION
8.9 Real Number Instruction
535
8
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).
*1 The LOG instruction is not supported by the ST language and the FBD/LD language. Use LOG of the standard function.
Setting data
■
Descriptions, ranges, and data types
■
Applicable devices
Ladder diagram
Structured text
ENO:=LOGP(EN,s,d);
FBD/LD
Operand Description
Range
Data type
Data type (label)
(s)
Data whose natural logarithm is calculated or head device
number where the data is stored
Single-precision real number
ANYREAL_32
(d)
Head device number for storing the operation result
Single-precision real number
ANYREAL_32
EN
Execution condition
Bit
BOOL
ENO
Execution result
Bit
BOOL
Operand
Bit
Word
Double word Indirect
specification
Constant
Others
X, Y, M, L, SM,
F, B, SB, S
T, ST, C, D, W,
SD, SW, R
U
\G
Z
LC
LZ
K, H
E
$
(s)
(d)
(s)
(d)
EN
ENO
d
s
Summary of Contents for MELSEC iQ-F FX5
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