E-10 Appendix E—Barcodes

SOH AzL1 enables barcode printing and honors line feeds. SOH AzL1 is commonly used where vertical paper motion is controlled with form feeds.

SOH AzL2 enables barcode printing and discards line feeds. SOH AzL2 is commonly used where vertical paper motion is controlled with line feeds only. In an application such as a report program generator, SOH AzL2 preserves the RPG's expected positions of page endings and headers.

Both commands perform the same function, with the following difference: SOH AzL2 calculates the number of lines required to print the barcode symbol, and human readable line, if any, then calculates the comparable number of line feeds at the line spacing in use prior to the start of barcode printing, and then eliminates that number of line feeds minus one from the text following the barcode. For example, if you specify a barcode symbol 3/4-in. high, and if the text line spacing is set at 6 lines per in., a total of four lines plus a fraction of a line is required to print the barcode. The fraction of a line is rounded up, for a total of five lines. This number of line feeds, less one, is discarded; therefore, the next four line feeds after the barcode SOH AzL2 are discarded.

BARCODE DATA

This section provides information on entering barcode data, including:

Valid characters for each type of barcode

How to enter barcode data

Adjusting the width of the quiet zone

Spacing

Controlling the placement of PostNet barcode symbols

Error checking

Number system characters

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Epson 4100 manual Barcode Data