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S5-115U Manual
Preface
The S5-115U is a programmable controller for the lower and mid performance ranges. It meets all
the demands made of a modern programmable controller.
The performance capability of the S5-115U has recently been enhanced. In addition to increases in
speed, the new generation of CPUs also offers uniform and user-friendly handling.
To put the controller to optimum use, you require a certain amount of detailed information. This
manual presents all this information in an organized manner.
We have also been able to improve the quality of the manual with the help of your corrections
and improvement suggestions. A proforma for further corrections and improvement suggestions
is included at the end of the manual. You can help us to improve the next edition.
Important Changes and Additions in this Manual:
•
Detailed and uniform description of the CPU operating modes and the STARTUP charac-
teristics (Chapter 2)
•
Taking account of EMC-oriented cable laying in the design of a controller (Chapter 3)
•
Operator-oriented presentation of Chapter 4 ("PLC System Start-Up and Program Test")
•
Improved representation of the structure of the STEP 5 programming language (Chapter 7)
•
Additional "Interrupt Processing" section (Chapter 9)
•
New version of the "Analog Value Processing" section (Chapter 10)
•
Description of new integral organization blocks (Chapter 11)
•
Simplified initialization of internal functions in DB1 (Section 11.3)
The idea behind all this has been to make sure you receive all the information you require for
working with the S5-115U.
However, not all problems that might occur in the many and varied applications can be handled in
detail in a manual. If you have a problem that is not discussed in the manual, contact your nearest
SIEMENS office or representative. You will find a list in Appendix D.
EWA 4NEB 811 6130-02b
Preface
xv
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