Ln_ - Natural Logarithm; Log_ - Logarithm Base 10 - Siemens Moore 353 User Manual

UM353-1

3.2.57 LN_ - NATURAL LOGARITHM

LN_ function blocks, in firmware 1.30 and higher, will output the
natural logarithm of input X. When the input is <= 0.0, the input will
be treated as the smallest number greater than 0.0 (i.e. 1.17....e-38) and
the LN will be computed accordingly.
X LNe (X)
.
Input X
BLOCK DIAGRAM

3.2.58 LOG_ - LOGARITHM BASE 10

LOG__ function blocks, in firmware 1.30 and higher, will output
the logarithm to the base 10 of input X. When the input is <= 0.0,
the input will be treated as the smallest number greater than 0.0
(i.e. 1.17....e-38) and the LOG will be computed accordingly.
X
LOG
10
. Input X
BLOCK DIAGRAM
March 2003
O1
Output 1
.
O1
(X)
Output 1
.
Function Blocks
NATURAL LOGARITHM
LN ESN = 000
Input X X
O =LNe (X)
1
I N P U T X
INPUT X ..............
loop tag.block tag.output
E S N
Exec. Seq. No. ..................... 000 to 250
LOGARITHM BASE 10
LOG ESN = 000
X
Input X
O1
O = LOG (X)
1
I P U X
N T
INPUT X ..............
loop tag.block tag.output
E S N
Exec. Seq. No. ..................... 000 to 250
O1 Output 1
(null)
(000)
Output 1
(null)
(000)
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