Siemens SIMATIC MV500 Operating Manual page 67

"MATCH" parameter
Different input boxes are displayed, depending on the set value. These are described below.
"Match = Position": "Start position" and "Length" input boxes
You specify the reference string as follows:
● Start position
1st character of the reference string; default: 1
Value range: 1 ... 3000
● Length
Length of the reference string; default: 1
Value range: 1 ... 735
Example:
Saved code = 1PABCDEF, Start position = 3, Length = 2
The read codes are checked to determine whether "A" is located at the 3rd position and "B"
at the 4th position.
"Match = ID": "Separators" and "ID" input boxes
If you select the value "ID" in the "Match" drop-down list, these input boxes are enabled.
For information about selecting "GS1", refer to the "ID" input box.
You specify the reference string according to the following rules:
● The substring start is identified by the ID.
● The ID can be at the beginning of the read code or immediately following one of the
separators in the "Separators" box.
● If no separator from "Separators" follows, the substring extends up to the 1st separator
found in "Separators" or to the end of the code.
● The default for separators is "+". A maximum of 4 separator characters are supported.
● If the two strings match, the result string is output.
● If the two strings do not match, the configured match error is output.
Example:
Saved code = A-1P01234+B, separators = +-, ID = 1P, read code = A-1P01235-B
Substring of the read code: 01235, substring of the saved code: 01234
SIMATIC MV500
Operating Manual, 05/2019, C79000-G8976-C495-02
Application
5.1 Program
67