Delta DVP-15MC Series - Page 375

DVP-15MC Series Motion Controller Operation Manual
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 Function Explanation
 The LEFT/RIGHT instruction extracts a specified-length string from the string In and the extracted
string is output to Out. The LEFT instruction extracts characters from the left of the string In and the
RIGHT instruction extracts characters from the right of the string. The way of extracting characters
is illustrated as below.
 Precautions for Correct Use
 The input variables are not allowed to omit. An error will occur during the compiling of the software
if the input variables are omitted. But the output variable is allowed to omit.
 Programming Example
 When the LEFT_In string is ’AaBbCcDd’, LEFT_L=2 and LEFT_EN is TRUE, Out1 is ’Aa’ as shown
in the following table 1. When the RIGHT_In string is ’AaBbCcDd’, RIGHT_L=2 and RIGHT_EN is
TRUE, Out1 is ’Dd’ as shown in the following table 2.
 The variable table and program 1
Variable name
Data type
Current value
LEFT_EN
BOOL
TRUE
LEFT_In
STRING
‘AaBbCcDd’
LEFT_L
UINT
2
Out1
STRING
‘Aa’
 The variable table and program 2
Variable name Data type Current value
RIGHT_EN BOOL
TRUE
RIGHT_In
STRING
‘AaBbCcDd’
RIGHT_L
UINT
2
Out1
STRING
‘Dd’
In =ABCDEFGH
LEFT
Out :
ABCD
ABCDEFGH
Extract 4 characters
from the left of the string
LEFT
L=4
Out : EFGH
ABCDEFGH
Extract 4 ch aracters
from the right of the string
RIGHT
RIGHT
1
LEFT
EN ENO
In Out
LEFT_EN
LEFT_In Out1
LLEFT_L
1
RIGHT
EN ENO
In Out
RIGHT_EN
RIGHT_In Out1
L
RIGHT_L