Rung 1 - As long as the B3:1/0 "No left light on" bit isn't set, this timer will be enabled. We are ignoring the XIC I:0/0 left turn signal in the explanation below for simplicity. You may have to right click the image below and open and new tab depending on your browser.īelow is the explanation of how each timer is triggered by the previous one creating the cascading timer sequence. You screen should be sequencing through rungs 0-5 similarly to the video below.
It should still be wired to the Green button from the previous lesson.ĥ. Open the RSS file in RsLogix 500, download it to your PLC, switch the PLC to Run Mode, and Go Online.Ĥ. This is a simplified version of the RSS file you used in the Sequencing Machine Steps lesson, only including the timer sequence programming.Ģ. Download the CougarTurnSignalTimer.RSS file. In our example the first timer is no lights, then when it completes it starts the inside lights timer, then when it completes then it starts the middle lights timer, then when it completes it starts the outside lights timer, then when it completes it restarts with the no lights timer and repeats.ġ. This can be repeated for as many timers as you like. In this lesson you will dive deep into how the LAD 4 TIMER routine of the previous RsLogix 500 - Sequencing Machine Steps uses cascading timers to sequence through steps.Ĭascading Timers are timers that are locked together in such a way that when one timer completes then the next timer begin.
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