Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal - Manual (Page 90)

Chapter 5
Ladder Program Basics
5–6
With the SLC 5/02 processor, additional input logic instructions (conditions)
can be programmed in the output branches to further condition control of the
outputs. When there is a true logic path, including extra input conditions on
an output branch, that branch becomes true.
Example – Parallel Output Branching with Conditions (SLC 5/02 Only)
A
B
C
D E
In the above example, either A and D or B and D provide a true logic path
to E
Nested Branching
With the SLC 5/02 processor, input and output branches can be “nested” to
avoid redundant instructions, to speed–up processor scan time, and provide
more efficient programming. A “nested” branch is a branch that starts or
ends within another branch. You can nest branches up to four levels deep.
Example – Nested Input and Output Branches
Important: APS allows all branching combinations to be programmed in a
fixed, SLC 5/01, or SLC 5/02 processor. The HHT does not
support nested input or output branches or additional conditions
on output branches to be programmed in a fixed or SLC 5/01
processor.