Vector VEC-VA Series, Programming Manual

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VA Motion Controller Programming Manual
227
10.4.10 LEFT (Remove the last few characters of the
string)
IL programming
language
LD, FBD programming language
Function: The LEFT instruction is used to retrieve the last few consecutive characters in the
input string.
LD IN
LEFT L
ST OUT
ST
programming
language
OUT:=LEFT ( IN, L )
Note : IL, ST language programming needs to insert variables IN, L and OUT or use
constants in the variable worksheet of the current
POU
数据 Data type processed by LEFT instruction
Input
and output
type of
data
description
IN STRING Input string
L ANY_INT The number of characters to be fetched
OUT STRING
Output, take out
L
consecutive characters from the
leftmost side of the input string ; L must be greater than 0 ,
and less than or equal to the number of characters of
the input string
IN

Funtion and Action examples
Extract the first three characters of
the string
"VECTOR"
description
When the contact is O N when the
instruction is executed, the
address V 409 string extracted first three
characters
Execution result:
V ECTOR - ---VEC