Programming
2.7 Functions
Expanding the user interface
2-100 Commissioning Manual, 11/2006, 6FC5397-0DP10-0BA0
2.7.27 STRING functions
Overview
The following functions enable strings to be processed:
● Determine length of string
● Find a character in a string
● Extract substring from left
● Extract substring from right
● Extract substring from mid-string
● Replace substring
LEN function: Length of a string
Syntax: LEN
(string | varname)
Description: Determines the number of characters in a string
Parameters: string Every valid string expression. NULL is output if
string is blank.
varname Any valid declared variable name
Only one of the two parameters is allowed.
Example
DEF VAR01
DEF VAR02
LOAD
VAR01="HALLO"
VAR02=LEN(VAR01) ; Result = 5
END_LOAD
INSTR function: Search for character in string
Syntax: INSTR
(Start, String1, String2 [,Direction])
Description: Searches for characters
Parameters: Start Starting position for searching from string1 into
string2. Enter 0 to start searching at the
beginning of string2.
String1 Character that is being searched for.
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