plc vs scada vs dcs

Discussion in 'The Projects Forum' started by Hassaan.Raazi, Oct 31, 2012.

  1. Hassaan.Raazi

    Thread Starter New Member

    Oct 31, 2012
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    we are working on a project and we need to use plc or scada or dcs, please someone suggest us what should we use and why any helpful link or reference?




    thanks in advance :)
     
  2. BSomer

    Member

    Dec 28, 2011
    433
    106
    I would think that the decision greatly depends upon what exactly the project is, your experience with them, and what you have available. Personally I would use a PLC because I have experience with them and have a couple different ones sitting around available for use. This of course depends upon what I need to have done, can I use something simpler like a micro-controller or descrete IC's.
     
    Hassaan.Raazi likes this.
  3. Hassaan.Raazi

    Thread Starter New Member

    Oct 31, 2012
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    Suggest me, actually we are making an automated system for growing plants in off-season, so here i want to know and decide that whether to use micro controller, PLC or Distributive control system.
    Thanks =)
     
  4. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
    5,001
    745
    Ok so your using process flow control for ...

    water feeding, humidity sensing, heating & temperature sensing, possibly lighting control,
    and anything else you need

    so you need sensors for these and relays to switch them on/off

    A set of op amps, or PIC micro will do this,
     
  5. Hassaan.Raazi

    Thread Starter New Member

    Oct 31, 2012
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    The thing is that what is more economical for growth of plants..
    plant parameter controlling etc etc.
     
  6. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
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    You must have at least looked into each of these you mention to understand what the terms mean.

    a simple irrigation system could possibly be an embedded system or a PLC. Your irrigation system may be separate from your air handling system, and those two systems may be overseen by another controller as in DCS, and, you may want to log data or drive a profile in SCADA fashion. Obviously with such a general question, you need to do a lot of leg work to tighten up your specifications.
     
  7. panic mode

    Senior Member

    Oct 10, 2011
    1,321
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    you have to start by defining the problem and all of the constraints.
    look into something that does the job.

    it is like asking "i need some transportation, what do you suggest?"
    it could be anything from shoes to space shuttle.
     
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