Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 308)

Chapter 16
Instruction List Programming
16–4
Output Rung Examples
This section shows you examples of output rungs and their optimized
instruction list representation. Like the input rungs, many output rungs have
more than one possible instruction list representation. Therefore, where
applicable an optional representation is shown to the right of the optimized
list.
Single Output
It is possible to have a rung made up of just an output. An example of such a
rung is shown below.
a
NEW RUNG
OUT a
Optimized
Output Branching
You can program parallel outputs on a rung to allow a true logic path to
control multiple outputs, as shown in the following example.
Important: It is possible to have a rung with output branching and no input
instruction.
a b
c
d
NEW RUNG
LD a
OUT b
OUT c
OUT d
Optimized
Output Branching With Conditions
As stated in chapter 6, additional input logic instructions, or conditions, can
be programmed in the output branches to further control the outputs.
Four different examples of output branching with conditions are provided for
you. Study each example to get a better understanding of when you need to
use multiple output circuit connecting instructions (MPS, MRD, and MPP) in
your output branches. (See page 8–10 for more information regarding the
use of these instructions.)