GerryM

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About GerryM

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  • Birthday 04/04/68

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  • Location Auburn, NY, USA
  • Country United States

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  1. 0-10v input using 0-5v

    Probably not, most industrial sensors use 24vdc for a power supply. Check the manufacturer's documentation, you can not presume what the power supply requirements are. I would also not "just go with it". The 0-5V into a 0-10V input gives you only 512 bits. That resolution usually sucks unless your application really can deal with it. You'll have to calculate the accuracies and see. I would investigate buying the pressure transmitter with a 4-20mA output and use your 4-20mA input into the PLC. You still need to check the accuracy and resolution of that as well before you do so.
  2. VB6 to VB.net migration

    I find it easier to convert first and see what is different. Some things like database access and others were completely different for me. Those areas will need to be re-written from scratch. It really depends on the code you are starting with. Some programs convert well others don't.
  3. More accuracy in analog readback

    Multiply by 10 before you divide and see what you get as rlp122 suggested. You may have to use double precision math at that point I'm not sure. It's been a while since I've done math with that PLC. The way you have it now you are depending on every bit. That is not realistic. What accuracy do you need? I'm guessing that input card is about 1/4% of F.S. accuracy which would give you about +/- 0.025 volts on a 0-10V scale.
  4. As far as OSHA goes this is the one phrase that I tend to work by: " The point of operation of machines whose operation exposes an employee to injury, shall be guarded. The guarding device shall be in conformity with any appropriate standards therefor, or, in the absence of applicable specific standards, shall be so designed and constructed as to prevent the operator from having any part of his body in the danger zone during the operating cycle." here's the link to it: OSHA As far as ANSI goes they have some spec.'s for specific types of machines in the ANSI B11 series. ANSI B11.19 conatains general safeguarding principles, and ANSIB11.TR3 has recommendations for risk assessments. Other than that I also like STI's website and products: STI's Safety Corner Your local safety supplier or control integrator may also be able to help you with safety assessments.
  5. Go here; Analog manual and copy one of the examples starting on page 14 into your program. Change the addresses to match with your card, depends on the position in the rack and what other cards you are using. Then you're done.
  6. I have been taught something similar. I took a course called Software Engineering once that detailed some of this process. Do I use it? Not really. I do tend to plan out things before writing code, usually a flow chart of sorts in pencil. I just don't follow any formal steps since its just me writing the code and not a team.
  7. Please help

    I assume the DV1000 is plugged into the top port. Did you unplug it and connect your laptop to the top port for programming? I have limited experience with the DV1000 so i can't help much with that.
  8. visual basic

    If you don't know either than you may as well learn the newest one.
  9. visual basic

    I converted one large project and it took a couple of hours to fix everything for .net, exept for the database functions. That took a couple of days. There are some things in .net that are just way different, and some that are similar to VB6. For a person making the transition from VB6 to VB.net I liked "The Book of VB.net" by Matthew McDonald. It gets you up and running with .net from a VB6 programmers point of view. Once you'e past that point pick a book or better yet books based on your needs. One book doesn't seem to cover it all, there are too many details to cover. Find the free version of vb.net and start there as has been suggested already.
  10. Ozz Food & Wines

    I don't know anymore. I don't actually drink that much anymore for heartburn reasons. And, I don't have the skinny on California anymore, since my relative in San Francisco moved back to NY State a few years ago. I did have some nice Syrah from California before, but can't remember from where.
  11. Ozz Food & Wines

    I didn't realize anyone knew of the Finger Lakes Wines outside of the Finger Lakes. There are some that are pretty good. They do much better with whites than reds. I have had some excellent riesling and not too bad chardonnay from around here. Pinot Noir is supposed to be good but i don't like the grape. I prefer the reds, so I buy alot from other areas. There is alot of sweet stuff in the Finger Lakes because that's what sells. Most people I know don't know what a good wine is since they weren't brought up in California, eventually that should change.
  12. "Start" Help

    Take a look at 9.2.5.2.1 and 9.3.1 in the NFPA 79. They come close to backing you up on not using the safety device as a machine start. I had the same issue a few years ago, but not with the boss, big difference. I just told them that I can't do it and that was the end of it.
  13. Overhead Display

    This is more of an LED style. I have never ordered from them so i can't comment on quality. http://electronicdisplays.com/index.asp or http://www.vorne.com/index.html
  14. Panel motor protecting.

    Yes, there are lots of great calculators and articles. The burn stuff I've seen too many times now from electrical safety training. Its the best thing to use to convince people to use there PPE for sure. The last slide show I saw was a time elapse of a guys electrocuted leg over the course of a few days. It got really disgusting just before they amputed it. But it worked on me anyway, i'm a PPE believer now.
  15. Panel motor protecting.

    You can use this website to check your calculations. And don't forget to read the NEC, that's where it all comes from. http://www.electrician2.com/calculators/motor_ver_1.html The fuse and wire size is based on the table in the NEC not the motor nameplate. Only the OL setting is determined from the nameplate amps. Use 125%, not 120%. I don't follow your voltage drop calculation, but yes #6 should be fine in a 1" conduit. 175% + next standard size is the max. fuse you can use. I usually use 125%x FLA with a nice bussmann low peak fuse with no problems.