Siemens SIMATIC S5 CP 523 Manual page 6

Introduction
Conventions
In order to improve the readability of the manual, a menu-style breakdown has been used, i.e.:
• The individual chapters can be quickly located by means of a thumb register.
• There is an overview containing the headings of the individual chapters at the beginning of
the manual.
• Each chapter is preceded by a breakdown of its subject matter.
The individual chapters are subdivided into sections and subsections. Boldface type is used for
further subdivisions.
• Pages, figures and tables are numbered separately in each chapter. The page following the
chapter breakdown contains a list of the figures and tables appearing in that particular
chapter.
Certain conventions were observed when writing the manual. These are explained below.
• A number of abbreviations have been used.
Example: Central processing unit (CPU)
• Footnotes are identified by superscripts consisting of a small digit (e.g. "
footnote is generally at the bottom left of the page or below the relevant table or figure.
• Cross-references are shown as follows:
"( 7.3.2)" refers to subsection 7.3.2.
No references are made to individual pages.
• All dimensions in drawings etc. are given in millimetres/inches (mm/in.).
• Information of particular importance is framed in
grey-bordered
• All program examples have been generated in statement list form and always refer to the
same slot.
• All data in connection with the programmer refers to the German version of the PG 685. The
relevant user manual contains a detailed description of programming procedures with this
programmer.
• The "Reader's Note" in Section 7 provides references to various subsections, thus making it
easier to find the subsections relevant to your application or specific requirements.
Manuals can only describe the current version of the device or unit. Should modifications or sup-
plements become necessary in the course of time, a supplement will be prepared and included in
the manual the next time it is revised. The relevant version or edition of the manual appears on
the cover. The present manual is edition "1". In the event of a revision, the edition number will be
incremented by "1".
At the end of the manual you will find correction forms. Please enter in these forms any
suggestions you may have in the way of improvements or corrections and send them to us. Your
comments will help us to improve the next edition.
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CP 523
"), or " ". The actual
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EWA 4NEB 811 6044-02a