
Programming concepts
5.2 Elements of the user program
S7-200 SMART
106
System Manual, V2.3, 07/2017, A5E03822230-AF
Note
Because it is not possible to predict when the CPU might generate an interrupt, it is
desirable to limit the number of variables that are used both by the interrupt routine and
elsewhere in the program.
Use the local variable table of the interrupt routine to ensure that your interrupt routine
uses only the temporary memory and does not overwrite data used somewhere else in
your program.
There are a number of programming techniques you can use to ensure that data is
correctly shared between your main program and the interrupt routines. Refer to the
descriptions of the Interrupt instructions (Page 322).
Содержание SIMATIC S7-200
Страница 30: ...Product overview 1 7 Programming software S7 200 SMART 30 System Manual V2 3 07 2017 A5E03822230 AF ...
Страница 267: ...Program instructions 7 6 Counters S7 200 SMART System Manual V2 3 07 2017 A5E03822230 AF 267 HSC modes 3 and 4 ...
Страница 394: ...Program instructions 7 18 Subroutine S7 200 SMART 394 System Manual V2 3 07 2017 A5E03822230 AF ...
Страница 425: ...Communication 8 5 PROFIBUS S7 200 SMART System Manual V2 3 07 2017 A5E03822230 AF 425 ...
Страница 786: ...Technical specifications A 11 S7 200 SMART cables S7 200 SMART 786 System Manual V2 3 07 2017 A5E03822230 AF ...
Страница 798: ...Error codes C 4 PLC fatal error codes S7 200 SMART 798 System Manual V2 3 07 2017 A5E03822230 AF ...
Страница 848: ...Ordering information F 6 Human Machine Interface devices S7 200 SMART 848 System Manual V2 3 07 2017 A5E03822230 AF ...