Pros Cons DCS & PLC

PLC

DCS

+++

  • Flexible programming
  • Follow vendor standard
  • PLC

  • more Engineering Time
  • 60% faster Engineering time compare to PLC
  • DCS

  • Open protocol
    *easy to integrate to other device
  • Proprietary protocol
  • PLC

  • Integration needed between controller to HMI (SCADA)
  • Integrated software between controller & HMI
  • DCS

  • Customization is Easy
  • Follow vendor standard, customization is not recommended
  • PLC

  • for IO below 10,000
  • applicable for more than 10,000 I/O
  • DCS

  • Low cost hardware
  • Pricy hardware
  • PLC

  • IEC 61131-3 Programming skill required
  • no Programming skill required.
  • DCS

  • applicable for fast response application
  • slower cycle time compare to PLC
  • PLC

  • Limited loop control (PID)
  • applicable for very large loop control (PID)
  • DCS

DCS & PLC history: https://www.rifqion.com/menulis/plc-scada-vs-dcs/

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