Manual

Publication 1746-UM004B-EN-P - December 2005
Preface 3
Terms and Abbreviations
The following terms and abbreviations are specific to this product. For
a complete listing of Allen-Bradley terminology, refer to the
Allen-Bradley Industrial Automation Glossary, publication ICCG-7.1.
• Module - SLC 500 BASIC and BASIC-T modules (catalog
numbers 1746-BAS and 1746-BAS-T)
• BASIC development software - BASIC Development Software
(catalog number 1747-PBASE)
• DH485 - network communication protocol
• EPROM - Erasable Programmable Read Only Memory
• MTOP - system control value that holds the last valid memory
address
• RS-232/423 - serial communication interface
• RS-422 - differential communication interface
• RS-485 - network communication interface
• SLC 500 - SLC 500 fixed and modular controller
Conventions Used in This
Manual
The following conventions are used throughout this manual.
• Bulleted lists such as this one provide information, not
procedural steps.
• Numbered lists provide sequential steps or hierarchical
information.
• Bold type is used for emphasis.
• Text in this font indicates words or phrases you should type.