As the printer monitors incoming data from a computer, it “looks” for this character. Ec is a special control code which identifies the subsequent string of characters as a printer command. The first character is always the ASCII escape character, identified by the Ec symbol. PCL printer commands consist of two or more characters. The Form Feed (FF) control code advances the current active position (CAP) to the same horizontal position at the top of the text area on the next page. The Carriage Return (CR) control code moves the current active position (CAP) to the left margin on the current line.
The distance to the next line is defined by the current line spacing (defined by the last VMI or line spacing setting). The Line Feed (LF) control code advances the current active position (CAP) to the same horizontal position on the next line. The Null (NUL) control code performs No Operation. Note: The ASCII command strings, command names, and descriptions were taken from the HP PCL5 Printer Language Technical Reference Manual and the HP PCL5 Comparison Guide Addendum that are available from Hewlett Packard at hp.com. This document was last updated on 28 June 2012. This document provides information on common HP PCL5 commands that are used by Host Print Transform (HPT).
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