Exp_ - Natural Exponentiation; Ext_ - Exponentiation - Siemens 353 User Manual

Function Blocks

3.2.39 EXP_ - NATURAL EXPONENTIATION

EXP_ function blocks perform the natural exponentiation function,
base "e". The output will be the value "e" raised to the power of
input X.
X
.
Input X

3.2.40 EXT_ - EXPONENTIATION

EXT_ function blocks will provide an output that equals the Y
input raised to the power of X input. All negative values of input
Y will be treated as 0.0. When input Y is 0.0 and X is negative,
the output will be set to the maximum number (i.e. 1.17...e38).
X
Input X
.
Y
Input Y
3-44
e X
O1
Output 1
BLOCK DIAGRAM
X
Y
Output 1
BLOCK DIAGRAM
NATURAL EXPONENTIATION
X
Input X
I N P U T
.
E S N
EXPONENTIATION
Input X X
Y
Input Y
I N P U T
U
I N P T
O1
E S N
.
UM353-1B
EXP ESN = 000
X O1 Output 1
O = e
1
X
INPUT X ..............
loop tag.block tag.output
E xec. S eq. N o. ..................... 000 to 250
EXT ESN = 000
X O1 Output 1
O = Y
1
X
INPUT X ..............
loop tag.block tag.output
Y
INPUT Y ..............
loop tag.block tag.output
E xec. S eq. N o. ..................... 000 to 250 (000)
April 2012
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(000)
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