Rockwell Automation 9323-S5500D A.I. SERIES MICROLOGIX 1000 AND PLC-500 SOFTW - Manual (Page 445)

MicroLogix 1000 and PLC-500 A.I. Series Software Reference
19-14
Advanced Diagnostics
Not available in MicroLogix 1000 A.I.
Advanced Diagnostics provides a method of searching for a desired rung using page
title documentation. See Chapter 8 - Adding Descriptive Text to Ladder Logic for
information on entering page titles.
Your project is probably already organized into logical functional segments by using
subroutines. The main program is in program file number 2. Subroutines are in file
numbers three and up. Page Titles allow you to further organize your ladder programs
by marking functional blocks within each program or subroutine.
For instance, if you had several hundred rungs that controlled a particular machine, you
could place a page title at the first rung of that part of the ladder program. The page
title could identify that part of the program as being “Control Logic for Machine #2”.
When something goes wrong with machine #2, you could perform an Advanced
Diagnostics search on the program, and immediately see the outputs for the control
logic for machine #2. If you are online with the processor, you can see the outputs
change as the machine operates. If you want to edit the ladder logic, you can select the
rung you want to go to, press [Enter] , and then immediately go to the rung in the
ladder program.
See Chapter 10 - Searching Functions for details on how to perform an Advanced
Diagnostics Search.