Chapter 10: Bar Code Commands for 9-Pin Printers102Select Code 39 Bar Code CommandThe command for selecting Code 39 isESC DLE A m 2 0 n 3 n 4 n5 n 6 n 7 n 8Code 39 Parameter mParameter m designated the number of parameters to be set. The value of m is normally set tohexadecimal 08.Code 39 Parameters n3 and n4These parameters set the vertical length of the bars in units of 6/72", as calculated by theequation[(n 3 x 10) + n 4 ] x 6/72"where the total value must be less than or equal to 25.Code 39 Parameter n 5This 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 Character Width12345671/144"2/144"3/144"4/144"5/144"6/144"7/144"Code 39 Parameter n 6This 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 Character Width12345674/144"5/144"6/144"7/144"8/144"9/144"10/144"
