6/8/2011 7:40 AM | |
Posts: 119 Rating: (1) |
I have a project in which i have to transfer a sterlizer (pharmasutical machine)from Wire logic to PLC . can any one give me some help details on that project . |
6/8/2011 9:39 AM | |
Joined: 1/28/2009 Last visit: 9/10/2024 Posts: 6849 Rating: (1365) |
Also check this:
regards |
6/13/2011 3:56 PM | |
Posts: 241 Rating: (7) |
and.."can any one give me some help details on that project ." how could one help here? any idea? He needs a reference project that is some did . Am I right? |
6/14/2011 12:09 AM | |
Joined: 10/7/2005 Last visit: 9/23/2024 Posts: 3021 Rating: (1054)
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Dear all this thread has taken on a life of its own (a week has gone and no feedback at all fromthe thread starter concerning this), so allow me to add a few morethings to be aware of in the hope it may either help ahsan1820orsomeone else who stumbles across this in the future: 1.) The obvious one: Ladder logic is the best choice to reproduce any hardwired relay based "logic" in a PLC program (this is the reason Ladder logic was invented which stronglyresembleselectrical schematics). 2.)The NOT so obvious one: A hardwiredcircuit (includingrelays, timer relays, mechancial drum sequencerns, analogue controllersetc) has its own timing rules. A direct conversion ofthese circuit toa Ladder logicbased "softwired"PLC program changes this, sinceyou are now dealing with a digital control system and its timing rules (e.g. scan based/cyclic execution). This may (or maynot) create a slightly diferent and/or non-functioning control behaviourand is at least something to be aware of and to be considered when doing the conversion. I hope this helps |
Last edited by: fritz at: 6/14/2011 3:40 AMtypos and grammar Cheers |
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6/14/2011 9:51 PM | |
Posts: 8946 Rating: (999) |
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