LG31 Printer

This manual serves as a comprehensive guide for experienced programmers and personnel involved in serial interface installation and printer configuration for the LG31 300 LPM Line Matrix Printer. It details the printer's control codes, control sequences, and configuration methods using interface and printer control straps.

Key areas covered include:

• LG31 Features: A general description of the printer, its operational theory (serial interface, control panel, mechanism, electronics, power supply), and detailed electrical, mechanical, and functional specifications, including print speeds, resident fonts, and character sets.
• Configuration: Instructions on how to print and reconfigure printer control straps and serial interface settings (including RS-232-C connector details, XON/XOFF protocol, baud rate, and parity).
• Character Processing: Explanation of how the printer handles 7-bit and 8-bit control and printable characters in text mode, character set mapping, and the functions of various control characters and escape sequences.
• Text Mode Escape and Control Sequences: A detailed breakdown of multi-byte escape and control sequences for advanced text printing, covering font and attribute selection, graphic size modification, horizontal and vertical character spacing, print area parameters (page length, margins), and cursor positioning commands.
• Printer ID, Status, and Reset Sequences: Information on requesting device attributes, managing device status reports, and resetting printer features to their initial default states.
• Graphics and Special Printing: Chapters dedicated to implementing Sixel Graphics, vector drawing, barcode printing, and block character sequences using specific LG31 control commands.
• Appendices: Provide reference material such as supported character sets, a summary of control codes and sequences, factory default settings, and a VFU (Vertical Forms Unit) cross-reference table.

The manual emphasizes configuring the printer through software switches (control straps) and using various control sequences to achieve diverse printing functionalities, from basic text to complex graphics and barcodes.