Allen-Bradley PLC Demonstration Training Videos. See for more details. Next Lesson www.youtube.com
10 – Which Rung Wins? (AB PLC Training)
July 7th, 2010 by admin
Posted in plc 
Posted in plc
I just felt like being hit in the face with a shovel; what a revelation; love the way you break down PLC operation into its most simplest forms; like how you said “PLCs don’t work like human brains; it can’t see what’s ahead”….what a great way of explaining it all…very simple, but straight to the point.
whoops..i already did that..but PC seems to be fine..so i must have gotten lucky….thanks for the info..
do NOT plug a regular Ethernet cable into that port … there is 24VDC on some of the pins that can damage your computer … I buy any cables that I need from the PLCTRAINER site … (I have no financial connection with that site) … you can find a link on the Links to PLC Resources page of my website … Ron
kool…will do that..but i do have one question…im unsure of what cable is needed or my RSlogix 500 to communicate with my SLC 500..it looks just like a regular CAT5 cable..but im reading in places that is untrue..i need some kind of dh485 cable?..where can i grab something of this sort..
Greetings Nick … these little preview videos have “adjusted” the way a LOT of people have always looked at PLCs … I’m glad you found them useful … you might also want to take a look at the free Email Quizzes available from the Sample Lessons page of my website … they contain a lot more material along these same lines … no registration is necessary … good luck with your studies … Ron
awesome video..i was waitin to get to see why the lamp was off..makes good reason now..i dont have any experiance with PLCs…but i was given a SLC 500 and im goin to start practicing..videos are great..what little i read and was told about PLCs..has been adjusted now..
I’m sorry but I do not fully understand your question. I suggest that you join one of the free public PLC forums listed on the “Links to PLC Resources” page of my website and post your questions there. These YouTube comments don’t allow enough room to give detailed questions and answers. I’m glad that you’ve found my videos helpful but I am not planning to do any more on timers and counters. Those can be discussed on the forums that I mentioned. I and the other forum members will try to help.
Dear Sir, could you explain me, when can we consider a path contineous from left to rite?
We are looking for timer /counter applications, pl let u kno, where we can have the timer/counter videos. We like & understand your explanation clearly, thats why asking many things, hanks
Oh, I agree with you Ron, your approach is actually scientific. Which is a good approach for those already experienced “clearing away years of misconceptions’ and all. :>) Just stating, those new to PLCs, may be less discouraged with the simple approach instead of the scientific approach, if all they are required to do is use the PLC to troubleshoot a machine, not program it. :>) Instructors should definitely attend your boot camp. Keep on doing the great job you are.
Greetings bin952. Actually those incorrect programming methods that you mentioned are highly effective teaching tools much like using a cut-away engine block to show how the pistons and valves inside an engine work. By investing an hour or two on Monday morning this way, our Boot Camp classes can clear away years of mistakes and misconceptions. Troubleshooting any type of problem is always easier once the under-the-hood operation of the system is fully understood. Thank you for your comment.
Are you asking about the XIC for Lamp E in the bottom branch? That condition will NOT give a continuous path after the bit/box for Lamp E has been written to a ZERO status by the previous rung. Remember that the “green on the screen” is not always accurate because it can’t be updated through the communication cable fast enough to show the actual TRUE or FALSE condition of each instruction. If I’ve misunderstood your question, please ask again and give greater detail. Ron
Interesting Ron, using incorrect programming methods to teach. It would be helpful to the beginners, to explain; “most machines they will work with, worked correctly the week or day before, so programming issues will not be the problem in most cases, it will typically be a switch or something external to the PLC”. Normally you are just using the PLC to trace down what limit switch is not working, for example. A much simpler approach than troubleshooting programming errors. Keep it simple. :>)
Hi,
the last example, I not understood that the stop switch is true, but why lamp E is false? could you explain?Although its showing a contineous path from left to right.
Wow, i don’t have enough words to thank u. God bless u, keepup the great job
Great Explanation !!
Thanks a lot
thank you … I’m glad that you found it helpful …
great scanning cycle explanation!
thank you for your comment …
very nice!