DCS (distributed control system) which comes from the DCS Distributed Control System includes the main control section, which is similar to the PLC, but bigger talent than Either control, Batch, Sequencial, Analog Control and Advance Contol and user interface which is similar to Scada, including the history, History, and other stores.
Because the control system in the first session will be used as a control Relay system. But soon evolved into PLC by language programming of PLC, it has all five languages: Ladder (LD), Instruction List (IL), Sequence Function Chart (SFC), Structure Text (ST) and Function Block Diagram. (FBD) to operate through a graphic that PLC will be connected to other devices is the MMI (Man Machine Interface) or sometimes referred to as HMI (Human Machine Interface), which in the PLC, most will not have built-in by the HMI. can display the value and status of the process and can Operate HMI, which is in part to show the important Historical Report, Alarm Message, Trend.
DCS is a system that evolved after the PLC will be the language used to write different. Depending on the brand. While there are some basic PLC logic in actual use in controlling large the process relatively static (such as process oil and gas) it is more stable than, and DCS will include Graphic, Trend, Historical, Alarm Message. included in the self.
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