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What's DCS?

What's DCS?

DCS à»ç¹Ãкº¤Çº¤ØÁẺ¡ÃШÒ «Öè§ÂèÍÁÒ¨Ò¡ Distributed Control System ã¹ DCS ¨Ó»ÃСͺ仴éÇÂËÅÑ¡æ ¤ÃèÒÇæ ¤×Í Êèǹ¤Çº¤ØÁ «Ö觤ÅéÒ¡Ѻ PLC áµèãË­è¡ÇèÒÁÕ¤ÇÒÁÊÒÁÒöÊÙ§¡ÇèÒ ·Óä´é·Ñ駡ÒäǺ¤ØÁẺ Batch, Sequencial , Analog Control áÅÐ Advance Contol áÅÐÊèǹµÔ´µèͼÙéãªé «Ö觤ÅéÒÂæ ¡Ñº Scada ÃÇÁ¶Ö§Êèǹà¡çº»ÃÐÇÑµÔ History áÅÐÍ×è¹æ

à¹×èͧ¨Ò¡Ãкº¤Çº¤ØÁã¹ÊÁÑÂáÃ¡æ ¹Ñ鹨Ðãªé Relay à»ç¹µÑǤǺ¤ØÁ·Ñé§Ãкº áµèµèÍÁÒä´é¾Ñ²¹ÒÁÒà»ç¹ PLC â´ÂÀÒÉÒ·Õèãªéà¢Õ¹â»Ãá¡ÃÁ¢Í§ PLC ¹Ñé¹ ¨ÐÁÕ·Ñé§ËÁ´ 5 ÀÒÉÒ ¤×Í Ladder (LD), Instruction List (IL), Sequence Function Chart (SFC), Structure Text (ST) áÅРFunction Block Diagram (FBD) ËÒ¡µéͧ¡Òà operate ¼èÒ¹ graphic ¹Ñé¹ PLC ¹Ñ鹨еéͧµèÍàª×èÍÁµè͡ѺÍØ»¡Ã³ìÍ×è¹ ¤×Í MMI (Man Machine Interface) ËÃ×ͺҧ·ÕàÃÕ¡ÇèÒ HMI (Human Machine Interface) «Öè§ã¹µÑÇ PLC ÊèǹãË­è¨ÐäÁèÁÕ built-in â´Â·Õè HMI ¨ÐÊÒÁÒöáÊ´§¤èÒáÅÐʶҹеèÒ§æ ¢Í§ process áÅÐÊÒÁÒö Operate ä´é «Öè§ HMI ÁÕÊèÇ·ÕèµéͧáÊ´§·ÕèÊӤѭ ¤×Í Historical Report, Alarm Message, Trend

DCS à»ç¹Ãкº·Õè¾Ñ²¹ÒÁÒËÅѧ¨Ò¡·ÕèÁÕ PLC â´Â¨ÐÁÕÀÒÉÒ·Õèãªéà¢Õ¹ᵡµèÒ§¡Ñ¹ ¢Öé¹ÍÂÙè¡ÑºÂÕèËéÍ áµè¡çÂѧÁÕ¾×é¹°Ò¹¢Í§ PLC logic ÍÂÙè ¡ÒÃãªé§Ò¹¨ÃÔ§ã¹Ãкº¤Çº¤ØÁãË­èæ·Õèà»ç¹ process ·Õè¤è͹¢éÒ§¹Ôè§ (àªè¹ process oil and gas) ¨ÐÁÕ¤ÇÒÁàʶÕÂÃÁÒ¡¡ÇèÒ áÅÐ DCS ¨ÐÁÕ¡ÒÃÃÇÁ Graphic ,Trend ,Historical, Alarm Message ÃÇÁÍÂÙèã¹µÑÇàͧáÅéÇ

ÃÙ»â¤Ã§ÊÃéÒ§ DCS ÃØè¹áá


ʶһѵ¡ÃÃÁ DCS

ʶһѵ¡ÃÃÁ DCS ¢Í§¼Ùé¼ÅÔµáµèÅкÃÔÉÑ·ÍÒ¨ÁÕâ¤Ã§ÊÃéÒ§µèÒ§¡Ñ¹µÒÁ¡ÒÃÍ͡Ẻ¢Í§¼Ùé¼ÅÔµáµèÅкÃÔÉÑ· áµè DCS ¢Í§¼Ùé¼ÅÔµ·Ø¡ºÃÔÉÑ·µéͧáºè§ÍØ»¡Ã³ì»ÃСͺÀÒÂ㹢ͧ DCS ʵÒÁ˹éÒ·Õè¡Òû¯ÔºÑµÔ§Ò¹áÅФÇÒÁÃѺ¼Ô´ªÍºà»ç¹ ˹èÇÂà¤Ã×èͧÁ×Í (module) àÊÁÍ áÁéÇèÒÍØ»¡Ã³ì»ÃСͺ¢Í§ DCS ¢Í§¼Ùé¼ÅÔµáµèÅÐÃÒ¨ÐÁÕª×èÍàÃÕ¡µèÒ§¡Ñ¹ áµè DCS µéͧ»ÃСͺ´éÇÂ˹èÇÂà¤Ã×èͧÁ×ÍÅѡɳФÅéÒ¤ÅÖ§¡Ñ¹´Ñ§¹Õé

1. ˹èÇÂàª×èÍÁµèÍ¡Ãкǹ¡Òà (process interface module) à»ç¹ÍØ»¡Ã³ìµÔ´µèÍÃÐËÇèÒ§ DCS ¡Ñº¡Ãкǹ¡ÒüÅÔµ ·Ó˹éÒ·Õè ÃѺÊÑ­­Ò³ÇÑ´¨Ò¡¡Ãкǹ¡ÒüÅÔµãËé¡Ñº DCS áÅÐÊè§ÊÑ­­Ò³¤Çº¤ØÁ¨Ò¡ DCS ä»Âѧ¡Ãкǹ¡ÒüÅÔµ ˹èÇÂàª×èÍÁµèÍ¡Ãкǹ¡ÒÃàº×éͧµé¹¢Í§ DCS »ÃСͺ´éÇÂ˹èÇÂÃѺÊÑ­­Ò³á͹ÐÅçÍ¡ (analog input module) ˹èÇÂÊè§ÊÑ­­Ò³á͹ÐÅçÍ¡ (analog output module) ˹èÇÂÃѺÊÑ­­Ò³´Ô¨ÔµÍÅ (digital input module) áÅÐ˹èÇÂÊè§ÊÑ­­Ò³´Ô¨ÔµÍÅ (digital output module)

2. ˹èǤǺ¤ØÁ¡Ãкǹ¡Òà (process control module) à»ç¹ÍØ»¡Ã³ìËÅÑ¡¢Í§ DCS ÊÓËÃѺ¤Çº¤ØÁ¡Ãкǹ¡ÒüÅÔµ â´ÂÃѺ¢éÍÁÙŢͧ¡Ãкǹ¡ÒüÅÔµ¨Ò¡Ë¹èÇÂàª×èÍÁµèÍ¡Ãкǹ¡ÒÃà¾×èͤӹdz¤èҢͧÊÑ­­Ò³¤Çº¤ØÁáÅÐÊ觡ÅѺä»Âѧ˹èÇÂàª×èÍÁµèÍ¡Ãкǹ¡ÒÃà¾×èͤǺ¤ØÁ¡Ãкǹ¡ÒüÅÔµÍÕ¡·Õ˹Öè§Ë¹èÇÂàª×èÍÁµèÍ¡Ãкǹ¡ÒèеԴµè͡Ѻ˹èǤǺ¤ØÁ¡Ãкǹ¡ÒÃâ´Âà¤Ã×Í¢èÒÂÂèͤÇÒÁàÃçǵèӢͧ DCS ¡ÒäǺ¤ØÁ¡Ãкǹ¡ÒüÅÔµàº×éͧµé¹¢Í§ DCS »ÃСͺ´éÇ ¡ÒäǺ¤ØÁẺ´Ô¨ÔµÍÅâ´ÂµÃ§áÅСÒäǺ¤ØÁẺµÔ´áÅдѺ

3. ˹èǵԴµèÍáÅл¯ÔºÑµÔ§Ò¹¢Í§¾¹Ñ¡§Ò¹ (operator interface module) áÅÐ˹èÇ»¯ÔºÑµÔ¡ÒâͧÇÔÈÇ¡Ã (engineerint workstation) à»ç¹ÍØ»¡Ã³ìµÔ´µèÍÃÐËÇèÒ§ DCS ¡Ñº¼ÙéãªéÃдѺÇÔÈÇ¡ÃáÅо¹Ñ¡§Ò¹·ÑèÇä» DCS ÍÒ¨á¡˹èǵԴµèÍáÅл¡ÔºÑµÔ¡Òâͧ¾¹Ñ¡§Ò¹áÅÐÇÔÈÇ¡ÒÃà»ç¹ÍØ»¡Ã³ì 2 ªØ´ ËÃ×ÍãªéÍØ»¡Ã³ìªØ´à´ÕÂÇÃèÇÁ¡Ñ¹·Ó˹éÒ·Õèà»ç¹Ë¹èǵԴµèÍáÅл¯ÔºÑµÔ¡Òâͧ¾¹Ñ¡§Ò¹áÅÐÇÔÈǡà ˹èǵԴµèÍáÅл¡ÔºÑµÔ¡Òâͧ¾¹Ñ¡§Ò¹·Ó˹éÒ·Õèà»ç¹ÍØ»¡Ã³×µÔ´µè͡Ѻ¾¹Ñ¡§Ò¹à¾×è͵ÃǨÊͺáÅФǺ¤ØÁ¡Ãкǹ¡ÒüÅÔµ ˹èÇ»¡ÔºÑµÔ¡ÒâͧÇÔÈǡ÷Ó˹éÒ·Õèà»ç¹ÍØ»¡Ã³ìµÔ͵èÍÃÐËÇèÒ§ DCS ¡ÑºÇÔÈÇ¡ÒÃÊÓËÃѺ¡ÒèѴâ¤Ã§ÊÃéÒ§¢Í§Ãкº¤Çº¤ØÁáÅÐàª×èÍÁµèÍà¤Ã×èͧÁ×ÍÀÒÂã¹Ãкº´Õ«ÕàÍÊ ¡ÒáÓ˹´ÃÒÂÅÐàÍÕ´áÅÐÅӴѺ¡ÒÃáÊ´§ÀÒ¾¡ÃÒ¿Ô¡ÊÓËÃѺ¾¹Ñ¡§Ò¹ ¡ÒÃà¡çººÑ¹·Ö¡¢éÍÁÙÅáÊ´§á¹Çâ¹éÁ»ÃÐÇѵԡÃкǹ¡Òà áÅТéÍÁÙÅàµ×͹à˵ءÒóìµèÒ§ æ ¢Í§ DCS

4. ˹èÇÂàª×èÍÁµèÍà¤Ã×Í¢èÒ (communication module) à»ç¹ÍØ»¡Ã³ìÊÓËÃѺàª×èÍÁµèÍÍØ»¡Ã³ì·Ø¡Êèǹ¢Í§ DCS ¡Ñºà¤Ã×Í¢èÒ¤Á¹Ò¤Á ˹èÇÂàª×èÍÁµèÍà¤Ã×Í¢èÒÂàº×éͧµé¹¢Í§ DCS ¨Ðàª×èÍÁâ§ÍØ»¡Ã³ì¤Çº¤ØÁ¡Ãкǹ¡ÒáѺÍØ»¡Ã³ìµÔ´µèÍáÅл¯ÔºÑµÔ¡Òâͧ¾¹Ñ¡§Ò¹

5. ˹èÇÂà¡çº¢éÍÁÙÅáÅлÃÐÇѵԡÃкǹ¡Òà (process data and history module) à»ç¹ÍØ»¡Ã³ìÊÓËÃѺà¡çº¢éÍÁÙÅÊÓËÃѺ¡ÒäǺ¤ØÁ¡Ãкǹ¡ÒüÅÔµ¢Í§ DCS áÅТéÍÁÙÅ»ÃÐÇѵԢͧ¡Ãкǹ¡ÒÃ˹èÇÂà¡çº¢éÍÁÙÅáÅлÃÐÇѵԡÃкǹ¡Òâͧ DCS ÁÑ¡µÔ´µÑé§ÃèÇÁ¡ÑºË¹èǵԴµèÍáÅл¯ÔºÑµÔ¡Òâͧ¾¹Ñ¡§Ò¹áÅÐÇÔÈÇ¡Ã áµè´Õ«ÕàÍÊÍÒ¨á¡˹èÇÂà¡çº¢éÍÁÙÅáÅлÃÐÇѵԡÃкǹ¡ÒÃÍØ»¡Ã³ìÍÔÊÃÐâ´ÂÁÕÍØ»¡Ã³ìàª×èÍÁµè͡Ѻà¤Ã×Í¢èÒ¤Á¹Ò¤Á¢Í§µ¹àͧ ÍØ»¡Ã³ìà¡çº¢éÍÁÙÅàº×éͧµé¹¢Í§ DCS »ÃСͺ´éÇÂÍØ»¡Ã³×à¡çº¢éÍÁÙŪ¹Ô´¨Ò¡áÁèàËÅç¡ (magnetic disk) áÅÐà·»áÁèàËÅç¡ (magnetic tape)

6. ˹èÇÂàª×èÍÁµè͡Ѻà¤Ã×Í¢èÒ¤ÍÁ¾ÔÇàµÍÃì (computer network interface module) à»ç¹ÍØ»¡Ã³ìàª×èÍÁµèÍÃÐËÇèÒ§à¤Ã×Í¢èÒ¢ͧ DCS ¡Ñºà¤Ã×Í¢èÒ¢ͧ¤ÍÁ¾ÔÇàµÍÃìÍ×è¹ÊÓËÃѺ¡ÒÃà¡çºÃǺÃÇÁ¢éÍÁÙÅáÅкÃÔËÒÃÃкº¤Çº¤ØÁ DCS ÊÒÁÒöµÔ´µè͡Ѻà¤Ã×èͧ¤ÍÁ¾ÔÇàµÍÃìÀÒ¹͡Ãкº´Õ«ÕàÍÊâ´ÂãªéÍØ»¡Ã³×àª×èÍÁµèͧ͢˹èǵԴµèÍáÅл¯ÔºÑµÔ¡Òâͧ¾¹Ñ¡§Ò¹áÅÐÇÔÈÇ¡Ã ËÃ×Íàª×èÍÁµè͡Ѻà¤Ã×Í¢èÒ¢ͧ DCS â´ÂµÃ§â´ÂãªéÍØ»¡Ã³ìàª×èÍÁµè͡Ѻà¤Ã×Í¢èÒ¤ÍÁ¾ÔÇàµÍÃì

7. ˹èÇÂàª×èÍÁµè͡ѺÃкºà¤Ã×èͧÁ×ÍÂèÍ (subsystem interface module) à»ç¹ÍØ»¡Ã³ìàª×èÍÁµèÍÃÐËÇèÒ§ DCS à¤Ã×èͧÁ×ÍÍ×è¹ã¹Ãкº¤Çº¤ØÁÀÒ¹͡Ãкº DCS àªè¹ ¾ÕáÍÅ«Õ ¡êÒ«â¤ÃÁÒⵡÃÒ¿ (gas chromatograph) ÍØ»¡Ã³ìÃѺáÅÐÊ觢éÍÁÙÅÃÐÂÐä¡Å (remote input/output device) áÅÐà¤Ã×èͧÁ×ÍÍ×è¹ æ ã¹Ãкº¤Çº¤ØÁ·ÕèÁÕ˹èÇ»ÃÐÁÇżŢͧµ¹àͧ DCS ÊÒÁÒöµÔ´µè͡Ѻà¤Ã×èͧÁ×ÍÍ×è¹ã¹Ãкº¤Çº¤ØÁâ´Â¼èÒ¹à¤Ã×Í¢èÒÂÂèÍ¢ͧ˹èÇÂàª×èÍÁµèÍ¡Ãкǹ¡ÒÃËÃ×Íàª×èÍÁµè͡Ѻà¤Ã×Í¢èÒ¤Á¹Ò¤Á¢Í§ DCS â´ÂµÃ§â´Âãªé˹èÇÂàª×èÍÁµèÍÃкºà¤Ã×èͧÁ×ÍÂèÍÂàªè¹à´ÕÂǡѺ¡ÒÃàª×èÍÁµè͡Ѻà¤Ã×Í¢èÒ¤ÍÁ¾ÔÇàµÍÃìÃкºÍ×è¹

8. ˹èǨèÒ¡ÓÅѧ俿éÒ (power supply module) à»ç¹ÍØ»¡Ã³ì¨èÒ¡ÓÅѧ俿éÒãËé¡ÑºÍØ»¡Ã³ì·Ø¡Êèǹ¢Í§ DCS ÍØ»¡Ã³ì¨èÒ¡ÓÅѧ俿éÒ ·Ó˹éÒ·Õè¡Ó¨Ñ´ÊÑ­­Ò³Ãº¡Ç¹áÅлÃѺÃдѺáç´ÑºãËéàËÁÒÐÊÁ¡ÑºÍØ»¡Ã³ìµèÒ§ æ ¢Í§´Õ«ÕàÍÊ áÅÐà¡çº¾Åѧ§Ò¹ä¿¿éÒÊÓÃͧÊÓËÃѺÃкº DCS

 

¡ÒõԴµÑé§ DCS ¤Çº¤ØÁ¡Ãкǹ¡ÒüÅÔµã¹âç§Ò¹ÍصÊÒË¡ÃÃÁ

¨Ðá¡¡ÃШÒµÒÁµÓá˹觵èÒ§ æ ·ÑèÇâç§Ò¹ÍصÊÒËÃÃÁµÒÁ¤ÇÒÁËÁÒÂÃкº¤Çº¤ØÁẺ¡ÃШÒ ·ÓãËé´Õ«ÕàÍÊÁÕÇÔ¸Õ¡ÒõԴµÑé§à¤Ã×èͧÁ×ÍáÅÐáºè§Ë¹éÒ·Õè¢Í§à¤Ã×èͧÁ×Íã¹Ãкº¤Çº¤ØÁµèÒ§¨Ò¡Ãкº¤Çº¤ØÁẺÈÙ¹Âì¡ÅÒ§à´ÔÁ

ÃÙ»¡ÒõԴµÑé§ DCS ¤Çº¤ØÁ¡ÒüÅÔµã¹âç§Ò¹ÍصÊÒË¡ÃÃÁ

 

¡ÒäǺ¤ØÁÃкº¡ÒüÅÔµ¢Í§ DCS

ÊÓËÃѺ¡ÒäǺ¤ØÁÃкº¡ÒüÅÔµ ¾¹Ñ¡§Ò¹ÊÒÁÒöÊÑ觧ҹä´éâ´Âãªéá»é¹¾ÔÁ¾ìàÅ×Í¡¨ÍáÊ´§ÀÒ¾¡Ãкǹ¡ÒüÅÔµáÅÐà¤Ã×èͧÁ×Í·Õèµéͧ¡ÒÃáÅÐÊÑ觧ҹº¹¨ÍÀҾ᷹¡ÒûÃѺà¤Ã×èͧ¤Çº¤ØÁẺà´ÔÁ  DCS áÊ´§¢éÍÁÙŢͧ¡Ãкǹ¡ÒüÅÔµâ´Â¾¹Ñ¡§Ò¹ÊÒÁÒöµÃǨÊͺ¡Ãкǹ¡ÒüÅÔµáÅÐà¤Ã×èͧÁ×͵èÒ§ æ ã¹Ãкº¤Çº¤ØÁ¨Ò¡¨ÍÀÒ¾¢Í§´Õ«ÕàÍʴѧ¹Õé

  1. ¡Ãкǹ¡ÒüÅÔµÃÇÁ (Overview display)
  2. ¡ÅØèÁ¡Ãкǹ¡Òà (Group display)
  3. ˹èÇÂà¤Ã×èͧÁ×Í (Instrument display)
  4. á¹Çâ¹éÁ¡Ãкǹ¡Òà (Trend display)
  5. ÀÒ¾¨ÓÅͧà˵ءÒóì (Graphic display)
  6. ÊÑ­­Ò³àµ×͹à˵ءÒóì (Alarm display)

 

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  • ¤ÇÒÁ¹èÒàª×èͶ×ÍáÅФÇÒÁ»ÅÍ´ÀÑÂ㹡Ãкǹ¡ÒüÅÔµ¢Í§ DCS

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  2. Ãкº¤Çº¤ØÁµéͧ¨Ñ´ËÒà¤ÃèͧÁ×ͤǺ¤ØÁÊÓÃͧÊÓËÃѺ¾¹Ñ¡§Ò¹¤Çº¤ØÁÊÒÁÒö»¯ÔºÑµÔ˹éÒ·Õè¤Çº¤ØÁ¡Ãкǹ¡ÒüÅԵ᷹à¤Ã×èͧÁ×ͤǺ¤ØÁËÅÑ¡Êèǹ·Õèä´éÃѺ¤ÇÒÁàÊÕÂËÒÂãËéÊÒÁÒö´Óà¹Ô¹¡ÒÃä´éµÒÁ»¡µÔ·Ñ¹·Õ
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