Kyocera ECOSYS FS-4100DN PRESCRIBE Commands Technical Reference Manual - Rev. - Page 95

start pattern A unique pattern of light and dark elements which indicates the leftmost part of a barcode label. stop pattern A unique pattern of light and dark elements which indicates the rightmost part of a barcode label. row A lateral set of elements made up of a start pattern, codewords, and a stop pattern. Each PDF417 symbol must have at least 3 rows. See figure below. Stop pattern Start pattern Left row indicator codeword Data codeword Right row indicator codeword Quiet zone Quiet zone Quiet zone Row 1 Row 2 Row 3 Row 4 Quiet zone In each row, between left and right row indicators, there may be from 1 to 30 data codewords. Collectively, among all rows, these codewords form data columns. Overall Symbol Structure Any PDF417 symbol is made up of at least 3 rows, and at most 90 rows. The minimum number of codewords in a row is 3; this includes the left row indicator codeword, 1 data codeword, and the right row indicator. Every symbol contains 1 codeword (the first data codeword in row 0) indicating the total number of data codewords within the symbol, and at least 2 error-detection codewords. General PDF417 symbol structure is indicated in the following diagram: 5-11