Document Conventions About This Book
14 3BSE 027 941 R301
Document Conventions
The following conventions are used throughout this document for the presentation
of material:
• In a syntax rule statement or example, a word in boldface represents a reserved
keyword or string.
• References to other documents are in italic.
• Control Builder M is normally called just Control Builder or CB in this book.
Terminology
The following is a list of terms and acronyms used in this document.
Table 1. Terminology
Term/Acronym Description
AC 800M A hardware platform comprising units and units that may
be configured to provide a controller that fulfills specific
requirements.
AC 800M Controller Any controller constructed from the units and units
connected to the AC 800M hardware platform.
Cabinet The outer case of a piece of equipment (a packaging
option), for example the Controller cabinet.
CB, Control Builder Control Builder M, an engineering tool used to configure
and program the AC 800M controller.
Central I/O Input/Output units, mounted onto a DIN-rail, and directly
connected to the AC 800M controller via ModuleBus.
CEX-bus Communication Expansion Bus, (for communication
units).
Controller Computer-based unit for digital and/or analog control.
CPU Central Processing Unit. A functioning unit consisting
primarily of a microprocessor and memory.
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