Technical data

1Introduction
Aims of the manual This manual is intended to provide specialized information about
programming the CPU 928B for users who already have basic
knowledge of programming PLCs and want to use the CPU 928B in
the S5-135U programmable controller. If you do not yet have this
basic knowledge, we strongly advise you read the documentation
introducing the programming language STEP 5 (
STEP 5 Manual,
refer to Chapter 13) or take part in a course at our training center.
SIEMENS provides comprehensive training for SIMATIC S5. For
more detailed information, contact your local SIEMENS office.
Contents of Chapter 1 Chapter 1 explains how to use the manual and deals with the areas of
application of the S5-135U programmable controller with the
CPU 928B and its structure.
The chapter explains the typical mode of operation of a CPU and the
structure of the CPU program.
You will also find a few suggestions about how to tackle
programming and will learn some of the features of the CPU 928B
(-3UB12) which are important for programming.
If you have already worked with the CPU 928B (-3UB11) and would
like to know the differences between these modules and the
CPU 928B (-3UB12), refer to Section 1.8.
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CPU 928B Programming Guide
C79000-D8576-C898-01
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