Oki ML591 MICROLINE Reference Manual - Page 140
Select Code 39 Bar Code Command, Table 68: IBM/Epson Select Code 39 Command
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Select Code 39 Bar Code Command The command for selecting Code 39 is ESC DLE A m 2 0 n3 n4 n5 n6 n7 n8 Code 39 Parameter m Parameter m designated the number of parameters to be set. The value of m is normally set to hexadecimal 08. Code 39 Parameters n3 and n4 These parameters set the vertical length of the bars in units of 6/72", as calculated by the equation [(n3 x 10) + n4] x 6/72" where the total value must be less than or equal to 25. Code 39 Parameter n5 This parameter sets the width of the narrow bars in 1/144" increments. Table 68: IBM/Epson Select Code 39 Command - Narrow Bar Widths for Parameter n5 Values (9-Pin Printers) Value of n5 1 2 3 4 5 6 7 Character Width 1/144" 2/144" 3/144" 4/144" 5/144" 6/144" 7/144" Code 39 Parameter n6 This parameter sets the width of the narrow space characters in 1/144" increments. Table 69: IBM/Epson Select Code 39 Command - Narrow Space Widths for Parameter n6 Values (9-Pin Printers) Value of n6 1 2 3 4 5 6 7 Character Width 4/144" 5/144" 6/144" 7/144" 8/144" 9/144" 10/144" 102 Chapter 10: Bar Code Commands for 9-Pin Printers