Tally Genicom 6600 Dark/Light Bar Ratios, Fourth Command V0505000T0250IBARC,C128,B,Vert RightG

Chapter 4

^G Command Terminator

Fourth Command:

^V0505000^T0250^IBARC,C128,B,Vert Right^G^-

^V0505000 Causes barcode to print vertical right with a height of 0.5 inches.

^T0250 Tabs the start of the barcode 2.5 inches from the left margin.

^IBARC,C128,

Turns ON Barcode Mode and selects Code 128 barcode.

B, Prints the character translation below the barcode.

Vertical Right

Data to be encoded as a Code 128 barcode and printed below the barcode as Draft 10 CPI characters.

^G Command Terminator

Dark/Light Bar Ratios

The default widths of the light and dark bars that comprise each barcode style are determined by the ratios given in Table 3. These ratios are read in pairs, with the first number of the first pair being the width of the narrowest bar in dot columns, and the second number of the first pair being the width of the narrowest space in dot columns. The second pair of numbers in the ratio refer to the next wider bar and space, respectively.

For example, Code 39 has the ratio 1:1:3:3 which means:

•The narrow bars and spaces are each one dot column wide.

•The wide bars and spaces are each three dot columns wide.

If a barcode style has more than two pairs of numbers, it has more than two bar/space widths. For example, Code 128 has the ratio 1:1:2:2:3:3:4:4. Since this is comprised of four pairs of numbers, four different widths of bars and sapces are used in this particular barcode:

•The narrowest bars and spaces are one dot column wide.

•The next wider bars and spaces are two dot columns wide.

•The next wider bars and spaces are three dot columns wide.

•The widest bars and spaces are four dot columns wide.

Ratio numbers may range in value from 0 to F, hexadecimal. That is, a ratio value of A corresponds to decimal 10 and F corresponds to decimal 15.

NOTE: The printer does not verify that a given ratio sequence adheres to the standard barcode specification. Many barcode ratios will cause the barcode to fall outside the specifications, resulting in unreadability.

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