Printronix P9000 Series manual Attribute Set and Reset Codes

Print format, print mode, or international language selection can be controlled by a longer seF quence known as a Command Line. Command Lines are •string" type commands placed beF tween complete lines of text and affect the text which follows. The printer has six Command Lines: PMODE, OSET, PSET, LPI, LINES, and INCHES. Each of these Command Lines is discussed in this chapter under the appropriate Control Code function.

For example, when in P-Series protocol, the form length (in inches) can be set using the folF lowing command line:

SFCC INCHES;n.f

where: •n" is the whole number of inches, and •f" is the fractional increment in 0.5" increments.

When using the SFCC in a Command Line, the SFCC must be the first non-blank symbol in the line (•space," hex 20, is a blank symbol). In addition, characters following spaces (other than a valid line terminator) in a Command Line are ignored so that user comments can be included on the Command Line. The valid line terminators are Form Feed (FF), Line Feed (LF), and Carriage Return (CR); however, when used in the Command Line, these line termiF nators do not cause any paper motion. If a Command Line contains an error, the command will not be executed, and the line will truncate to include any of the following error messages:

Command Line Error Messages
Error Message	Explanation
INVALID PARAMETER	The command received cannot be interpreted
	correctly, or the correct command is not followed by an
	expected delimiter.
PARAMETER OUT OF	A decimal parameter in the command is out of range.
BOUNDS
MISSING PARAMETER	One or more necessary parameters is missing
	from the command.
ILLEGAL CHARACTER IN	A decimal parameter contains a non-numeric
DECIMAL PARAMETER	character, or a fractional digit is out of range.
TOO MANY DIGITS IN	A decimal parameter contains too many digits.
DECIMAL PARAMETER

Attribute Set and Reset Codes

Certain print attributes are set and reset (turned on or off) by using the appropriate ESC or SFCC code sequence and the numbers 1 or 0. These may be either the hexadecimal code 01 and 00, or the ASCII code for the printable symbols of decimal 1 and 0 (hexadecimal code 31 and 30, respectively). Expanded Print, Super/Subscript Print, and Underline are attributes which are set/reset in this fashion.

Programming 6-3