Groups of Permitted Input Characters

There are multiple variable formats that may be used to filter the input. This helps to avoid mistakes when entering data. The user is only allowed to enter the permitted characters.


Select this format when there is no need to limit the variable input data. For example: a variable can be used to define changes in barcode, text and graphics.


Use this format for numeric variables such as serial numbers, EAN and UPC barcodes. Only numeric characters in the range from 0 to 9 can be entered.

Sequence: 0123456789


Use this format when numbers and characters are mixed in the same variable. Characters from 0 to 9 and from A to Z can be entered.

Sequence: 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz


Use this format for variables that only contain letters.

Sequence: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz

Digits & Capitals

Use this format for variables that only contain digits and capital letters.

7-bit ASCII

The variable will contain only characters with ASCII code from 0 to 127.


Use this format to allow entering hexadecimal numbers.

Sequence: 0123456789ABCDEF


Use this format to customize the range of allowed characters.

Code 39, Code 128A, Code 128B, Code 128C, Code 128, Codabar

Use these formats to only permit the use of characters that are included in the corresponding barcode standards.