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regexinputwildcardmaskplc

Input mask wildcards in a PLC language, i need to represent 4 characters

How do i use wildcards in my input mask in a PLC language (structured text)?

 ^^[0-9][0-9][A-Z][2][0]



    main()
    {
    barcodeData = getBarcode();

    if (match(barcodeData, "^^[0-1][0-9][2][0][P]*"))
        {do something
        }
    else{dosomethingelse
        }
    }
Solution

  • This seems like a regular expression. There * is not a wildcard but a quantifier. It means that the preceding character or group can occur zero or more times. . is a wildcard. It means any character except newline. [...] is a character set. It means any character from the set.

    . is a wildcard for one character.

    .* is a wildcard for any number of characters.

    [.] means exactly one dot.

    .{4} means four wildcards.

    You can use sandboxes and cheatsheets like https://regexr.com/ to test your regular expressions.