Rockwell Automation 57C610 Enhanced Basic Language, AutoMax - Manual (Page 15)

2Ć3
Each of these tasks would be assigned a priority level (either in the
specific configuration task for the rack, or in later versions of the
Programming Executive software, through the configuration option).
The priority determines which task should run at any particular
instant. The more important the task, the higher the task priority.
2.3 Universal Drive Controller Application
Tasks
Universal Drive Controller (UDC) modules can be used in an
AutoMax Version 3.3 (or later) system for drive control applications.
Only UDC Control Block tasks can be run on a UDC module; BASIC
tasks cannot be run.
UDC Control Block tasks can use some of the statements and
functions in the AutoMax Enhanced BASIC language. See
Appendix D for a list of the BASIC language statements and
functions that are allowed in UDC Control Block tasks.