User`s manual

A–17Bar Codes
The above is always true except with the START/STOP and CENTER
character codes. The START/STOP character bar pattern consists of two dark
bars and one light bar for a total of three bars. The CENTER character bar
pattern has two dark bars and three light bar for a total of five bars.
Parameters P2 through P5 and P7 are not applicable and are ignored.
UCP–A has the following characteristics:
• Ten digit character set (0 – 9)
• START and STOP codes
• CENTER code
• Intercharacter gap not definable
• Fixed length of eleven characters per complete symbol. The first digit is
the number system code, usually followed by a five digit vendor
number. The next five digits are typically the product number. The
printer automatically computes the check digit and embeds it at the end
of the bar code. All twelve digits are encoded in the bar code symbol,
with six digits to the left of the CENTER code in odd parity and six to
the right of the CENTER code with even parity.
• If more or less than eleven characters are used or if any of the characters
are illegal, an error message.
UPC–E
UPC–E has two dark bars and two light bars for a total of four bars. Each
light/dark bar is 1 – 4 modules wide. A module is the smallest increment that
can represent data. Zeros are represented by light modules and ones by dark
modules. Each character contains some combination of seven modules that
total two dark bars and two light bars.
The above is always true except with the START and STOP character codes.
The START character bar pattern consists of two dark bars and one light bar
for a total of three bars. The STOP character bar pattern has three dark bars
and three light bar for a total of six bars.
Parameters P2 through P5 and P7 are not applicable and are ignored.
UPC–E has the following characteristics:
• Ten digit character set (0 – 9)