Plc 5\40e-fal logic help

bfranklin

Member
B
Join Date
Sep 2012
Location
Alberta
Posts
125
Hey,
Attached is a PLC 5 program I am working on. I am having a hard time understanding LAD 4 (starts on run 317). It has a bunch of FAL logic. I understand the function of the FAL and what is happening in the first few FAL instructions but it seems to be repeating itself using the same addresses with different expressions, and it gets me all confused.

THANKS!!!
 

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