Describing rungs – Rockwell Automation 9323-S5500D A.I. SERIES MICROLOGIX 1000 AND PLC-500 SOFTW User Manual
Page 179
Adding Descriptive Text to Ladder Logic
8-9
Describing Rungs
You can use PLC-500 A.I. to document the rungs of your ladder program. You can
attach a rung description to the output of the rung, or to the rung number.
Rung descriptions can be up to 64K bytes (characters) long. The whole rung
description will appear on ladder reports (unless you configure the ladder report not to
show rung descriptions), and up to 20 lines of a rung description can be displayed on
the ladder logic screen.
If you attach a description to a rung, the description follows the rung number. For
instance, if you attach a description to rung number 55, and insert three rungs before
rung 55, the description remains with the rung, following the rung to position 58.
Note
Under some circumstances, a rung will be moved without PLC-500 A.I. having a
chance to move the rung descriptions. For example, the program could be edited using
another software package, or at another terminal. If that happens, use the Adjust Rung
Pointers utility, on the Utility2 menu. See
Chapter 14 - Utility Options for Database
Maintenance
for details.
If you attach a rung description to the rung output, the description will appear on each
rung where that output is used. This means that the same rung description may appear
on multiple rungs.
Note
If you attach a rung description to a rung with branched outputs, the system attaches
the description to the rightmost output on the lowest branch. If the output instruction
contains multiple addresses, the rung comment is attached to the last address in most
cases.
!
When you delete a rung, the rung comment is also deleted if it is attached to the rung
number rather than the output. To save the rung comment before deleting the rung,
either:
•
change the attach mode to output,
•
save the rung and rung comment to a library, or
•
adjust the rung pointer up or down, delete the rung, adjust the rung pointer
back.
Command Portal keys
for this function:
.UUA