Version |
The PosiCode symbology supports two variations called versions, PosiCode A and PosiCode B, as well as an older version of both PosiCode A and PosiCode B called Limited PosiCode.
PosiCode A and PosiCode B encode the same character set, but PosiCode A uses fewer grid spaces per symbol character. PosiCode A is preferred for applications where the mark width approaches the resolution of the reader. PosiCode B is preferred for applications where the mark width must be larger than the G dimension (between 1G and 2G) due to limitations of the marking technology. PosiCode A is more tolerant than PosiCode B to mark placement inaccuracies for equivalent symbol density.
Consider the following differences between PosiCode and Limited PosiCode when selecting a version for your symbol:
The size of the alphabetic characters in Limited PosiCode is 12G for the A version (compared with 13G for the standard PosiCode A) and 15G for the B version (compared with 16G for the standard PosiCode B).
The Stop Character is replaced by a single Stop Bar for Limited PosiCode.
The mapping of character values to center-to-center distances is different for Limited PosiCode.
The check character in Limited PosiCode is computed slightly differently than that of standard PosiCode, to avoid situations where the check character read backwards appears as a valid start character.
Limited PosiCode requires a quiet zone of 12G for Limited PosiCode A and 13G for Limited PosiCode B. This quiet zone is defined as a zone which contains no complete bars. If a bar starts within the quiet zone, the center just be beyond the end of the quiet zone.
Limited PosiCode does not support the use of GS1-formatted data, while both the A and B variations of standard PosiCode do.
PosiCode