Siemens SIMATIC S5 CP 523 Manual page 4

CP 523
Preface
This manual is a revised, updated edition of the original CP 523 manual. The revision was necessary
because the CP 523 has been equipped with an additional communication control procedure, thus
upgrading the number of transmission modes in "Communications mode" from two to three:
• Transparent mode
• Interpretive mode
• 3964(R) mode ( new )
The characteristics of each mode are discussed in Section 2.3.2.
The CP 523 is a powerful I/O module which can be used in the S5-115U, S5-135U, S5-150U, S5-155U
and S5-115F programmable controllers. In order to make best use of the serial I/O module, you
require comprehensive information. For this reason, the CP 523 serial I/O module has its own
manual dealing only with those facts and examples that are relevant to the module. Demands for
a higher quality of technical documentation have also been met, which means
• Standardization of terminology and notation
• More detailed breakdown of subjects
• Illustration of individual problems
• User-friendly arrangement of the contents
The aim is that both users with little previous experience and SIMATIC S5 experts should find all
the information that they require to work with the CP 523.
However, the applications are so numerous that not all the problems that might occur can be dealt
with in one manual. For other problems, please ask your Siemens representative for advice.
EWA 4NEB 811 6044-02a
Preface
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