I don't get hands on with all these circuit variations as often as I'd like, but I learn a lot from these mental exercises, and I want to make sure I'm learning right. June 19th, 2018 - Each Level In The Program Is Referred To As A Rung Like In A Normal Ladder Timers Think Of A Timer In Ladder Logic As 2 Responses To 5 Ladder Logic''LADDER LOGIC TIMERS KRONOTECH JUNE 24TH, 2018 - INTRODUCTION SLC 500 TRAINING IN THIS SECTION WE WILL COVER TIMERS USED IN LADDER LOGIC PROGRAMMING TIMERS ARE VERY IMPORTANT IN. When the relay opens, removing power from this leg, the cap will be charged with 24V and will discharge through the coil, but since the 15k and 1k are in series for the cap's discharge, current through the coil will start at 1/16th of its normal operating current and drop rapidly from Please let me know if I've got the basic concepts right this time. The only way the RC circuit can effect the coil is if there's a severe limit on the available current (series resistance between voltage source and this leg.) Even then, with 1k vs 15k, the coil will take most of the available current and there will be no tangible effect. When power is applied to that portion of the circuit, the coil and the RC circuit are in parallel, so they both see the full 24VDC immediately. With 15k ohms in the RC circuit, it just can't do much. More importantly, the sim helped me see why #12 and strantor were right. That number came from combining the 15k resistor and 1k coil resistance in parallel (a mistaken approach,) and using the resulting ~937ohms in the RC calculation. After running the sim and re-thinking things, I realized I had it all wrong. It looks to me like yet another capacitor.Ĭlick to expand.I was hoping everyone would just forget I said that! Also, what looks like capacitors and variable caps with what appeared to me (I'm probably mistaken) is the relay that is supposed to control the light curtain. Something about your drawing I don't understand. To me (and what do I know?) there should be only one CR3, one CR4 and one CR5. Something that has me wondering is the designations of CR3, CR4 and CR5 (and other components) - they are used in multiple locations. (then again, I've seen some guys who were as sharp as a fuzzy tennis ball) Step 2 of the 8 (a) CTU (calculated counter) counter C5:1 is used in the considered ladder logic program. The operating procedure of the ladder logic program is considered to be described as follows. I got a lot of help modifying a 12 volt power supply to be able to put out 13.6 volts. Buy the book Step 1 of 8 Consider the ladder logic program shown in Figures 8-39 in the textbook. That diagram you posted - is that (um) chip a micro controller?īetter yet, what are you trying to accomplish? Are you just curious? (which is always a good thing when you don't hurt yourself) Are you trying to use this device for something other than what it was designed to do? Are you trying to bastardize it for some other purpose? There's a lot of guys here who are really sharp on those sorts of things.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |