Installation manual

1 Publication 1747-RM001G-EN-P - November 2008
Appendix E
Data File Organization and Addressing
This chapter discusses the following topics.
• Data file organization and addressing
• Specifying indexed addressing
• Specifying indirect addressing
(SLC 5/03 OS302, SLC 5/04 OS401, and SLC 5/05 processors)
• Specifying indirect indexed addressing
(SLC 5/03 OS302, SLC 5/04 OS401, and SLC 5/05 processors)
• Addressing file instructions (using the file indicator #)
• Numeric constants
• M0-M1 files, G files
(SLC 5/02 and higher processors with specialty I/O modules)
Understanding File
Organization
The processor provides control through the use of a program you create,
called a processor file. This file contains other files that break your program
down into more manageable parts.
Processor File Overview
Most of the operations you perform with the programming device involve the
processor file and the two components created with it; program files and data
files.
The programming device stores processor files on hard disk (or floppy disk).
Monitoring and editing of processor files is done in the workspace of the
computer. After you select a file from disk and edit it, you then save the file
Processor File
Program Files
Data Files