User manual

Publication LOGIX-AP010B-EN-P - May 2010 35
Software Conversions - Program Structure Chapter 2
Task Properties
The following property settings can be configured for all tasks:
• Watchdog - timer that specifies how long a task can run before
triggering a fault.
• Disable Automatic Output Processing To Reduce Task Overhead – this
is an option that allows output processing to be turned off, reducing the
elapsed time for that task. Normally at the end of a task the controller
performs overhead operations (output processing) for the I/O modules
in the system. While not the same as updating the modules, this output
processing may affect the update of I/O in the system.
• Inhibit Task - this is an option that prevents a task from executing when
the task trigger occurs. This option can be useful during
testing/commissioning.
RSLogix 5000 Programs
The RSLogix 5000 tasks can be divided into a number of programs. This
subdivision does not exist in Step 5, but can be used in RSLogix 5000 software
to achieve a more modular software architectural design.
When converting Step 5 applications with many individual OBs and PBs,
consider separating the application into one or more RSLogix 5000 programs.