Help Constructing Ladder Logic Problem

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gbtbtbt

Joined Mar 18, 2020
64
The question is to write a PLC ladder logic diagram for a display sign that will sequentially turn on three lights 2 seconds apart, then turn all three lights off and repeat the sequence. My ladder logic diagram for this problem is labeled on problem 12. The problem is I don't know how to turn off the lights two seconds part from each other? What do I need to do to fix this problem?
 

MaxHeadRoom

Joined Jul 18, 2013
22,332
Another very useful instruction in this kind of desired result, in that some PLC's have is the rising/falling edge one shot and is only present for one scan of the logic when the instruction goes either high or low.
Max..
 
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