Printronix P3000 Series - Manual (Page 155)

6–69 Programming
Vertical Tab Set/Clear (Serial Matrix)
ASCII Hex Decimal
P–Series N/A N/A N/A
Serial ESC B n 1B 42 n 27 66 n
Purpose Sets vertical tab positions.
Expression CHR$(27); ” B ” ;CHR$(n);...CHR$(nk);CHR$(0);
where n1 through nk specify the line number for the vertical tab(s), for a maximum of 16
tab positions. Either CHR$(0) or CHR$(128) can be used as the sequence termi-
nator.
Comment The physical position on the paper is the product of “n” and the current line spacing.
Subsequent line spacing changes do not change the tab position. If the value of “n”
defines a tab stop that exceeds the forms length, that tab position is ignored.
In Serial Matrix printer protocol, vertical tab positions are set by control code ESC
B and executed by control code VT. The tab positions must be in ascending order or
the sequence terminates. More information regarding Serial Matrix vertical tab set-
ting is provided in the Vertical Format Units chapter.
If the ESC B command is followed immediately by a sequence terminator, the verti-
cal tab positions are cleared.