mr_electrician

You bet, I am controlling 14 conveyors with the logo. 4 of which feed it's own CNC lathe. I use a time delay on those 4 independant ones so that after the robot graps the waiting part, the conveyor waits for 2 seconds for the robot to clear. Then the conveyor starts again. It will stop when the new raw part is seen in the nest by a photo eye. The photo eye also tells the robot that there is a part ready to be picked up. I also use the logo to give signals as well as receive signals from a part marker. Not bad for a guy who is just learning to program hey!! I think the company should give me a raise for all the money I am saving them on thses conveyors!! I do have one conveyour cell though in which I am using a S7-200 plc. Same logic though! Hopefully I will get as advanced as many of you fine gent's on here.

Allrighty then, here is my new question to all those great people who don't mind teaching a new guy. My question is, what is common practice when wiring start and stop buttons to a plc. Is it common to hard wire more than one start button in parallel to and input, as well as more than one stop button in series to an input. I have never seen this done nor have I done it, but it would sure help on freeing up inputs on your plc. Also, why or why not to the above question. Thanks guys!

Yes, I agree and was aware that is was not a PLC when I purchased it. I am using it to control a conveyor system in our plant. Nothing fancy, just a bunch of on/off buttons and some photo eyes. I maxed my outputs yesterday when I added 4 more conveyors, which brought me to a total of 14 conveyor motor contactors and a couple other outputs. O well, I have a way around it. I plan on using 1 output o control a 4 pole contactor, which in turn will control 4 motor controllers at the same time. I still find the logo a nice programable relay device.

I am using stop buttons on my conveyors, and use NC contacts on the stop button. I obviously use NC on an estop cct as well which is hard wired to an MCR. My MCR is what controls my power feeding my output cards so that if there was an emergency and the E Stop was pushed the all my control voltage for the output cards are disconnected.

Hello guys, I have a question for the very experience programmers on this site. Well A few I guess. I am an industrial electrician @ 34 years of age, and I really want to start gearing towards becoming a programmer. I know the basics when it comes to inputs, outputs, timers, and counters, but after that I am struggling. My questions to you guys are, 1 How did most of you get to where you are. Did you teach yourself or take a training course in college? 2 Are there standard lines of logic that programmers use, or is everyone unique? 3 How long does it take to become a good programmer.( I am guessing it would probably depend on experience and exposure) 4 Does it pay a good salary? 5 Do you enjoy it? Thanks to those who will reply.

Um???? OK, I do realize this so........

I agree with using NC contacts for stop buttons for the same reason of the possibility of bad contacts, loose wires, and so on. I also agree that the plc doesn't care if the stop button is NO or NC. I will probably continue to use NC for my stop buttons.

Thanks to all those who have replied. It is really encouraging for me!

C'mon now, is there really any difference between riding this robo ride or a ride at an amusement park. I would go on it or sure!!

I have used OMRON, Allen Bradley, and now SIEMENS. I enjoy the SIEMENS for the fact that it is like the Rolls Royce of plc's, and it nice and complicated. I figure if I can master SIEMENS then all the others will be easier to use. But that just me thinking.

Thanks Groo, that will help as well. I will give it a try just for practice, as well in my future programs. You guys ROCK! Ilook forward to learning lots from you guys. Hope you don mind getting bombarded with what might seem like simple logic to some of you guys.

Thank you very much. The provided logic works just the way I wanted it to do.