Rockwell Automation 9323-S5500D A.I. SERIES MICROLOGIX 1000 AND PLC-500 SOFTW - Manual (Page 171)

8
Adding Descriptive Text to
Ladder Logic
When you document a ladder program, you attach descriptions of the program’s
elements to the ladder logic, making it easier to see what the elements are doing.
Without these descriptions in the ladder program, you may lose track of how your
program functions.
PLC-500 A.I. can also use documentation (page titles) to divide the ladder logic into
sections and allow you to quickly locate the correct part of your program.
Note You can also use the Database Editor to document your ladder programs. For more
information on the Database Editor, see Chapter 9 - Using the Database Editor .
PLC-500 A.I. provides you with many ways to document ladder programs. You can
document:
•
Addresses (with descriptions and symbols)
•
Rungs
•
Pages of the program
•
The entire program, using a program note (revision history)
•
I/O modules
•
Custom display screens
PLC-500 A.I. does not store rung descriptions, page titles, program notes, or address
descriptions inside of the ladder program (.ACH) file. This means that the processor
memory is not burdened with the descriptions, allowing you to create program files that
are as large as the processor can hold. The documentation files are related to the ladder
file, so whenever you go online with the processor, you see the descriptions in the
ladder file.