Pointer and Address ragister

harrydeharry

Member
Join Date
May 2008
Location
Delhi
Posts
237
S7 guru's can any one tell me the best way to understand the pointer. Neither I get any good material on this except simatic help which was not sufficient.
Please help.
One more thing if we have accumulater why need address ragister ?
Since I am new to PLC your answer will be heighly supportive.
Thanks in advance
 
Chapter 25 of this publication is a good place to start....

Automating with STEP 7 in STL and SCL
Hans Berger
SIMATIC S7-300/400 Programmable Controllers
4th, Updated Edition edition (6 Jun 2007)
ISBN-10: 3895782955
ISBN-13: 978-3895782954
 
Concerning your second question: the accumators store data. The adress registers store addresses.
Usual instruction contain the address of the data, but in this case the address is static, defined as the code is written.
The pointer and the adress register allow to change the adress of the data during runtime, that means depending on the process.
 
Sir thanks for your post but can i have some more details as i am new to this and having some problem while understanding
Thsnkd
 
hey

Hey,

Is this a good book ?

Many examples ?


I'm thinking to buy it too

thanks


krk said:
Chapter 25 of this publication is a good place to start....

Automating with STEP 7 in STL and SCL
Hans Berger
SIMATIC S7-300/400 Programmable Controllers
4th, Updated Edition edition (6 Jun 2007)
ISBN-10: 3895782955
ISBN-13: 978-3895782954
 
The book about STL and SCL has many examples and also a diskette (maybe now it is a CD) with all the examples.
Very good book.
 
Combo said:
Hey,

Is this a good book ?

Many examples ?


I'm thinking to buy it too

thanks

just for all poeple

Introduction. 1. SIMATIC S&-300/400 Programmable Controller.

2. STEP 7 Programming Software.

3. SIMATIC S& Program.

Basic Functions.

4. Binary Logic Operations.

5. Memory Functions.

6. Move Functions.

7. Timer Functions.

8. Counter Functions.

Digital Functions.

9. Comparison Functions.

10. Arithmetic Functions.

11. Math Functions.

12. Conversion Functions.

13. Shift Functions.

14. Word Logic.

Program Flow Control.

15. Status Bits.

16. Jump Functions.

17. Master Control Relay.

18. Block Functions.

19. Block Parameters.

Program Processing.

20. Main Program.

21. Interrupt Handling.

22. Restart Characteristics.

23. Error Handling.

Variable Handling.

24. Data Types.

25. Indirect Addressing.

26. Direct Variable Access.

Structured Control Language (SCL).

27. Introduction, Language Elements.

28. Control Statements.

29. SCL Blocks.

30. SCL Functions.

31. IEC Functions.

Appendix.

32. S5/S7 Converter.

33. Block Libraries.

34. STL Operation Overview.

35. SCL Statement and Function Overview.'



 
:)

i just bought it for 105 dollars

Thim said:
just for all poeple


Introduction. 1. SIMATIC S&-300/400 Programmable Controller.


2. STEP 7 Programming Software.

3. SIMATIC S& Program.

Basic Functions.

4. Binary Logic Operations.

5. Memory Functions.

6. Move Functions.

7. Timer Functions.

8. Counter Functions.

Digital Functions.

9. Comparison Functions.

10. Arithmetic Functions.

11. Math Functions.

12. Conversion Functions.

13. Shift Functions.

14. Word Logic.

Program Flow Control.

15. Status Bits.

16. Jump Functions.

17. Master Control Relay.

18. Block Functions.

19. Block Parameters.

Program Processing.

20. Main Program.

21. Interrupt Handling.

22. Restart Characteristics.

23. Error Handling.

Variable Handling.

24. Data Types.

25. Indirect Addressing.

26. Direct Variable Access.

Structured Control Language (SCL).

27. Introduction, Language Elements.

28. Control Statements.

29. SCL Blocks.

30. SCL Functions.

31. IEC Functions.

Appendix.

32. S5/S7 Converter.

33. Block Libraries.

34. STL Operation Overview.

35. SCL Statement and Function Overview.'




 

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