![]() (b) If there is an odd number of digits in the group insert code ‘C’ immediately after theĤ. When in character set ‘B’ and a control character appears in the data: ![]() (a) If there is an even number of digits in the group insert code ‘C’ before the first digit. Or code ‘B’ before the last digit, using guidelines 1(b) and 1(c) above to choose betweenģ. If four or more digits occur together when in character sets ‘A’ or ‘B’: (b) Otherwise, if a control character occurs in the data before any lower case characterĢ. If start character ‘C’ is used and an odd number of digits begin the data, insert code ‘A’ (a) If the data begins with four or more digits use start character ‘C’. NOTE: The Bars & Stripes barcode software automatically choose the correct START, CODE, and SHIFT characters in accordance with the following guidelines. The following guidance should be followed to minimize the symbol length. Guidance on the use of START, CODE and SHIFT characters The Code 128 specification allows for Human readable information to be printed anywhere outside of the symbol area. ![]() The first column in the table, ‘The Value’, is the value used to calculate the check digit. Notice that the sum of the barwidths in any character is always even, and the sum of the space widths is odd. The table holds the bar/space widths for all the Code 128 character set. The narrowest possible bar or space will thus be one quarter the width of the widest. (The stop character has six bars and five spaces as the final symbol will always have one fewer space than bars.)Įach bar or space can be one of four different unit widths. ![]() The quiet zone should be at least ten times the width of the narrowest bar/space element.Įach character in the barcode symbol is composed of six bars and six spaces.
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