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Recent content by PLCMentor

  1. PLCMentor

    Magazines

    I had an email from one of the editors at Control Engineering stating that they would still publish due to the management taking over the publication. It's been a good magazine I would hate to see it go. Russell White, P.E. Automation Technologies, Inc. www.AutomationNC.com Automation Help...
  2. PLCMentor

    Can a PLC do Sequence of Events?

    My rule of thumb with my clients is to stay with what they have unless there is some overriding factor to change. If your facility is standardized on AB then I would stay with AB. As far as the help goes, this was interesting for me also. Feel free to contact me if you need to discuss this...
  3. PLCMentor

    Can a PLC do Sequence of Events?

    bdn, I think you can probably do the SOE on remote racks, but I think it would be worthwhile to have the ab guys come in to talk with you concerning your project. I think you have narrowed down what you want to do and now you need to get them in and grill them about what this card can really...
  4. PLCMentor

    Can a PLC do Sequence of Events?

    I didnt look at it too closely, but that is my impression also. I am always aware when I use 3rd party modules. It is done all the time and since rockwell lists this module as a solution for SOE on their website, they are essentially endorsing it for this application. I dont know the...
  5. PLCMentor

    Can a PLC do Sequence of Events?

    Also quoting from the site you posted: "Simple Global Positioning Satellite (GPS) integration using HiProm's 1756-HPGPS module allows geographically separate systems to operate with the same correlated time values." Cut sheet here...
  6. PLCMentor

    Can a PLC do Sequence of Events?

    Actually there may be some misunderstanding in the thread here. Looking at the page that bdn2004 references, the AB guys brag about being able to discern between events on the 100 microsecond level not 100 mS. Is the annunciator you are looking at operating at 4 milliseconds or microseconds...
  7. PLCMentor

    Remote I/O racks vs straight to PLC?

    Ok, so the annunciator talks modbus. The physical portion of modbus is RS485 if I remember correctly (never a good assumption). Is the annunciator a new system or existing? My question would be, can it be bought with a Ethernet I/P option. Standard ethernet is different than Ethernet I/P...
  8. PLCMentor

    Remote I/O racks vs straight to PLC?

    Ok, it's fine to do your research and come up to speed independently. Make sure you also talk with the integrator that put together the proposal. Don't assume anything - ask and have it confirmed. The prosoft cards are not Allen Bradley, they are third party cards. Not a problem, you just...
  9. PLCMentor

    Can a PLC monitor a website?

    I think that you would be better served to handle this a level above the PLC (HMI, SCADA). This information could then be pushed down to the PLC from such a system. Russell White, P.E. Automation Technologies, Inc. www.AutomationNC.com Automation Help www.PLCMentor.com
  10. PLCMentor

    Remote I/O racks vs straight to PLC?

    Looking at this thread, it still looks like more information might clear up some of the confusion. Why dont you tell us some more specifics. What brand/model PLC are you using? What communication modules and other modules are you saying you think you need? Also, when you think of remote...
  11. PLCMentor

    Trying to Learn PLC Programming

    I can elaborate some as examples, but it would be impossible to give a good answer here. Let me start with the last first... I don't know of any standard that covers good PLC programming methods. We have internal standards here, but I know of no book or document that covers this. Possibly due...
  12. PLCMentor

    Trying to Learn PLC Programming

    I think the best advice you have had here is to find out what companies in your area are using. Most companies in the us use AB. That's why AB will compromise less on price, training, software, etc than other companies. Some of the comments on programming are true but may be misleading to...
  13. PLCMentor

    configuring for analog output

    Well there's not a whole lot of information here, but I will take a stab with the info provided. I assume that you have an accumulation table where product is .... well accumulating. I also would assume that your three photo eyes are positioned in a manner that indicates increasing backup of...
  14. PLCMentor

    Legal Question

    I think there have been plenty of comments on making sure this was explicitly defined in your agreement. I would suggest going a step further, in the future, and developing a set of terms and conditions that you attach to all your quotes. You may still have some legal recourse depending on...
  15. PLCMentor

    PLC backplane protocols

    Actually the woodhead guys make 3rd party cards for the AB line. I suspect there is a way to contact AB and get that information - I am sure it will not be free. You might do better to handle via a communication path (ethernet i/p, control net, modbus or the like). What platform are you...
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