Mitsubishi MELSEC Q Series Programming Manual

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LOG(P)
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7.12 Special function instructions 7.12.23 Natural logarithm operation on floating-point data (Single precision) (LOG(P))
7.12.23 Natural logarithm operation on floating-point data
(Single precision) (LOG(P))
LOG(P)
*1: Applicable for the Universal model QCPU, LCPU.
Function
(1) Returns the natural logarithm of the value designated by taking (e) as base, and stores
operation results at device designated by .
(2) Only positive values can be designated by . (Operation cannot be performed on negative
numbers.)
Basic model QCPU: The upper five digits of the serial No. are "04122" or larger.
: Data of which the natural logarithm is obtained or head number of the devices where the data is stored
(real number)
: Head number of the devices where the operation result will be stored (real number)
Settiing
Data
Internal Devices
R, ZR
J\
U\G
Zn
Constants
E
Other
Bit Word Bit Word
–– ––
*1
––
–– ––
*1
–– ––
Process
High
performance
Redundant Universal
Ver.
Basic
LCPU
Command
Command
LOGP
LOG
LOGP
LOG
S
D
S D
S
D
S
D
S
D
32-bit floating-point
real number
( )
32-bit floating-point
real number
+1 +1
S DS D
log
S

Mitsubishi MELSEC Q Series Specifications

General

Brand	Mitsubishi
Model	MELSEC Q Series
Category	Controller
Language	English