Siemens 353, Руководство пользователя

Страница: 74 / 246

Function Blocks UM353-1B
April 2012 3-44
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.
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).
Input X
NATURAL EXPONENTIATION
O1 O utput 1
O
1
= e
EXP
ESN = 000
X
E
E xec. S eq. N o. ..................... 000 to 250 (000)
X T U P N I
INPUT X ..............
loop tag.block tag.output ( null )
S N
X
BLOCK DIAGRAM
O1 X
Input X
O utput 1 .
.
e X
Input X
EXPONENTIATION
O1 O utput 1
O
1
= Y
EXT
ESN = 000
X
E
E xec. S eq. N o. ..................... 000 to 250 (000)
Y T U P N I
INPUT Y
..............
loop tag.block tag.output ( null )
Input Y
Y
X T U P N I
S N
INPUT X ..............
loop tag.block tag.output ( null )
X
BLOCK DIAGRAM
O1
X
Y
Input X
Input Y
O utput 1
.
.
Y
X