Rockwell Automation Allen-Bradley DriveLogix 5730 User Manual page 18

1-8 What is DriveLogix5730?
Task 1
Task 2
Task 3
Task 4
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Notes:
A. The highest priority task interrupts all lower priority tasks.
B. The dedicated I/O task can be interrupted by tasks with priority levels 1
to 6. The dedicated I/O task interrupts tasks with priority levels 8 to 15.
This task runs at the selected RPI rate scheduled for the DriveLogix5730
system (2ms in this example).
C. The continuous task runs at the lowest priority and is interrupted by all
other tasks.
D. A lower priority task can be interrupted multiple times by a higher
priority task.
E. When the continuous task completes a full scan it restarts immediately,
unless a higher priority task is running.
Defining programs
Each program contains program tags, a main executable routine, other
routines, and an optional fault routine. Each task can schedule as many as
32 programs.
The scheduled programs within a task execute to completion from first to
last. Programs that are not attached to any task show up as unscheduled
programs. You must specify (schedule) a program within a task before the
controller can scan the program.
Defining routines
A routine is a set of logic instructions in a single programming language,
such as ladder logic. Routines provide the executable code for the project in
a controller. A routine is similar to a program file or subroutine in a PLC or
SLC controller.
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Time (ms)
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