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John_R

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Everything posted by John_R

  1. MarvinP; Seems to me you are making assumptions about the PLC programming environment, this is not some structured thing that you can treat like some Excel/Access/Powerpoint program. It entails understanding control logic, which is something you have to embellish from a real hands on type of structure, not spreadsheets and databases... yyh2, sorry, but no, this is not some top secret subject, but it is something you have to learn and understand. Nobody can wave a magic wand over your head and give you all knowing knowledge. You have to try (and yes fail from time to time), but if you first try (and that is the prerequisite), then ask questions, folks on this forum will gladly help you. But, sorry Charlie, nobody is gonna hand you a Golden Ticket...
  2. These cables are included with the PLC when you buy a new one (not some $100 cable you have to buy separately like some other manufactures). And any Unitronics supplier is likely to have some on hand. I have a half dozen new in package, would be happy to send you one for the cost of shipping, PM me if you are interested. JohnR
  3. I think that establishing solid communication is only one part of the puzzle. Completing the update is another puzzle piece. And then you will find out whether or not you actually have a valid application to run.
  4. And I've found over the years, that coworkers with a "Goey-In" can be much more rude & crude than us with the "Pointy-Outs".. Just sayin"...
  5. this may sound silly, but what happens if you put your setpoint at 552? does it settle in at closer to 550, or stay at 548.8? numbers are just visual indications of what's going on, but sometimes you just gotta tweak the numbers to get/show the results you want.. Just my 2-cents
  6. Well, that movie came out in the late 70's, I was in my early 20's... So you were about 6? 😇
  7. Well if no one sees it but me, I guess I should just ignore it.😌 Yep, that's where the saying came from. good memory..
  8. Naw, actually been there since early summer, just took me that long to ask questions about it.. Hmmm, maybe around the time of elevator discussions?
  9. Aus, I understand what you are saying, but don't know what I may have posted to trigger a NSFW? I know I am a sarcastic old fart, but that goes without saying when you are in your mid-60"s. 😇 And Cara says she doesn't see anything that should trigger that. And if the Uni-Goddess Cara doesn't see it then what?? 🤔
  10. Well gee Cara, If you don't know why it's there, then I must be in real deep trouble, "double secret probation"..🤪 I'm assuming that I'm the only one who see's this on my screen, and anyone else who looks at my posts or profile don't see it? John
  11. Hmmm, well this is the Gray Code truth table taken from the CTS spec sheet. and my encoder does follow this pattern (checking each output step by step with a meter). I've never played with a Gray code (so it's a gray area to me).🥴 Anyway, like I said, I thought a PLC program would be a good way of testing (but after 3 years of retirement, my coding is getting slow and rusty). JohnR
  12. What I have here is a piece of audio gear that uses this encoder wheel to scroll through options. And sometimes it goes wanky, when it should be scrolling "up", it will go up one step then down a step (or vice-versa). I first assumed it was a quadrature encoder, either Incrementing or Decrementing some counter, and was missing pulses that confused direction. Turns out the encoder outputs this Gray code, which gives a consistent output step by step, checking with a meter. So I thought I would make a "quick and dirty" test program on a PLC, where I could watch the results of spinning the encoder at normal speed, maybe something is floating... The encoder is a 16 position mechanical switch encoder (CTS series 288), which I have already sprayed with De-Oxid contact cleaner, with no improvement. And following up on years of troubleshooting experience, programmed controllers don't go wanky (it either works or doesn't), more than likely a problem with the input devices.. So here I am trying to find a way to real-time test this encoder..
  13. Hey All, Any of you have have a Vision routine made up to decode 1-16 from a 4-bit Gray Code? I'm picturing a lot of logic for a seemingly simple task... ABEF 1 - 0000 2 - 0001 3 - 0011 4 - 0010 5 - 1010 6 - 1011 7 - 1111 8 - 1110 9 - 0110 10- 0111 11- 0101 12- 0100 13- 1100 14- 1101 45- 1001 16- 1000 Regards, JohnR
  14. The old retired guy has to do something to keep the mind busy..🥴
  15. Yeah, it's not there in those places (the side of my post or the drop-down when you hover over). Just at the top right of my screen where it shows notifications and messages... And I'm on the forum almost every day...
  16. does that mean it's time for me to update my profile pic? an old and gray Marvin (smokin' a martian cigar)?
  17. I've noticed that there is a warning sign next to my profile pic in the upper right corner of the screen. Going to my profile page shows no such warning. Anyone know what this means? JohnR
  18. Over the years, I have written a lot of code using timers, sometimes with favorable results, other times (as you have experienced), the timers can give odd unexplained results. And I don't believe the Creators are going to put much effort into de-mystifying this in the Vision series. Like Aus, I favor the Counter/Compare scenario, us "old folk" was programming like this back when dirt was still young & moist...
  19. On the other hand, I was the main programmer at my job for years, I knew that someday I would retire, and I made every effort to to document my programs, and ensure that my co-workers had access to all my work. to me, that was common courtesy... Just sayin'....
  20. "Coming back to finish code you started writing 2 weeks ago" Ain't that the truth.... But remember Flex, that's why you should put Comments between each net of Hieroglyphics as you go....
  21. 2N2907, or can I call you PNP for short? Seems you are a "long time listener, first time caller".... I admire your tenacity to give such a long-winded response to this over-beaten topic, and like what you have to say... but I have resolved to refrain from any further comment to the OP... Welcome aboard. JohnR
  22. So... here comes some more of my innate sarcasm... it was not an Altair 8800, but the original Atari 2600 that led us there. So you are one of those people who think that the moon landing in 69 with Neil Armstrong and Buzz Aldrin was real? Naw, that was all staged in the in the deserts of Arizona.. I was 12 years old, and my summer school teacher, Sister Mary Vagina gathered us all to the assembly hall to watch this hoax on TV... Anyway, my point was not that a PLC is not capable of controlling an elevator, or some sort of extrication sub-routine, but merely that such operations need to be well documented and certified. also you state that your extrication protocol would "bring the elevator down to the next floor". In my childish mind, the elevator would have some sort of ratcheting pawl system (much like a roller coaster going up the first hill, click, click, click, if something should happen it holds you there), so I would take the disabled elevator UP to the next floor, going DOWN means you have to release said safety device and risk the elevator free falling to the bottom. Again, Just because you can, doesn't mean you should.... Just my opinion.... So, you are just a Hotel Handyman? And I suppose your Uncle Roy-Bob owns the joint, and has promised you a healthy bonus if you can find a way to circumvent the high-priced repairs needed to keep his hotel afloat?? How's that for sarcasm?? Learn it, Know it, Live it....🤓 JohnR
  23. Sorry, I see your intent, but again I ask if you are putting too much emphasis on the time each pump runs... You should already have some understanding of the mean runtime each pump can tolerate before rebuild/replacement. And when your helper pumps have to kick in, you should also track how much run time is involved there. But as I mentioned earlier, you can track the run time of each pump and put a time limit on which pump is the "main pump", and sequence from there. And contrary to your opinions in previous posts, I have been involved in "industrial control" since the late 80's, but I retired from the work-a-day world a little over two years ago. I still maintain a presence on this forum mainly to contribute some knowledge to the next generations (who often feel they know it all, but still show up here asking redundant questions). So please bare with my sarcastic responses... JohnR
  24. Well, that's kind of a tongue-in-cheek-inside-joke... And my mom just turned 90 last Monday, so please don't tell that I'm on the 'puter again. But seriously, are you controlling these 4 pumps via PLC? Can't you simply put a counter/timer on these and when each pump reaches it's allotted run time, you increment to the next? Or it that what you mean? You make it sound like you are attaching some external run time device in each pump. Technically, yes... but we always called the ones on bulldozers, tractors, combines, lawn-mowers and such, just plain "hour meters"
  25. Oh My... And I know this is gonna send me to "forum purgatory", but WTF are you talking about? You keep delving into control logic that is outside the realm of typical PLC control. This is why elevator manufacturers have dedicated (certified) controllers for these applications. And why hack programmers (with any common sense) should steer clear of these projects (unless they have a big pocketbook to back up the liabilities involved). 👿
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