User manual

Publication 1768-UM001C-EN-P - November 2007
Develop Applications 83
If you increase the time slice to 50%, the system overhead interrupts the
continuous task every millisecond.
If the controller only contains periodic tasks, the system overhead time slice
value has no effect. System overhead runs whenever a periodic task is not
running.
Additional Resources
These documents contain additional information pertinent to the
development of applications.
1 ms
System Overhead
1 ms
Continuous Task
5 10152025
Elapsed Time (ms)
Periodic Task
System Overhead
5 10152025
Continuous Task
Elapsed Time (ms)
Resource Description
Logix5000 Controllers Common Procedures
Programming Manual, publication
1756-PM001
Provides guidance on the development of
controller projects.
Logix5000 Controllers Design
Considerations Reference Manual,
publication 1756-RM094
Provides information pertinent to the design
of Logix5000 systems.
Logix5000 Controllers Execution Time and
Memory Use Reference Manual, publication
1756-RM087
Details how to estimate the execution time
and memory use of the controller’s logic.
Logix5000 Controllers General Instructions
Reference Manual, publication
1756-RM003
Details how to program the controller for
sequential applications.