How To Use This System Manual - Siemens SIMATIC S5-90U System Manual

S5-90U/S5-95U

How to Use This System Manual

The S5-90U and S5-95U are programmable controllers for lower and medium performance ranges.
They meet all the requirements for a modern programmable controller. To use these controllers
optimally, you need detailed information.
In this system manual we have attempted to present this information as completely and as well
organized as possible.
This How to Use This System Manual section gives you information that will make it easier for you
to find what you need. This section explains how the manual is organized.
Contents of This System Manual
• Hardware Description (Chapters 1, 2, and 3)
These chapters describe the controllers:
programmable controllers, how they function, and how you install them.
• Start-Up Information (Chapters 4, 5, and 6)
These chapters summarize the information you need to start up your programmable controller.
• The Programming Language of the Programmable Controllers (Chapters 7, 8, and 9)
These chapters describe the structure, operations, and structuring aids of the STEP® 5 pro-
gramming language.
• Functions of the Programmable Controllers (Chapters 10, 11, 12, 13, and 14)
Each of these chapters contains a complete description of a particular function, from wiring to
programming. Subjects include analog value processing, counter and interrupt inputs, integral
clock, and the programmable controller as a SINEC® L1 slave.
• Module Spectrum (Chapters 15 and 16)
These chapters contain information about all the currently available S5-100U modules that you
can use to expand your controller. Chapter 16, Function Modules, includes the modules that
require an extensive description (i.e., more than just technical specifications).
• Overviews (Appendices)
In these chapters you will find not only a complete list of operations but also the technical
specifications of the PLCs, RAM address assignments, system data assignments, dimension
drawings, a description of errors that may occur during operation of the programmable controller,
maintenance and repair procedures, guidelines for handling electrostatic sensitive devices, a list
of accessories, and reference literature about programmable controllers.
You will find correction pages at the end of the system manual.
corrections, additions, or suggestions for improvement you might have. Send these suggestions to
us. They will help us to improve the next edition of this system manual.
EWA 4NEB 812 6115-02b
How to Use This System Manual
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