SCADA is an abbreviation for Supervisory Control and Data Acquisition .
DCS stands for Distributed Control System.
Normally, a SCADA system will get the data from a RTU (remote terminal unit). A RTU runs independently, except for some control from the central supervisory system such as fire fighting, emergency shut-down (i.e water & oil pipelines). The communication path will be through a GSM, wireless technology, etc...
For a DCS system, it controls the process as a stand-alone system. It has the control loops built into it's own controller. The communication path will be through something like a LAN high-speed Ethernet, or other communications network. DCS is a single unit, or a group of local units
I think that my clarification helps a little bit on the subjects of DCS and SCADA.
Thanks
The traditional system, monitoring processes across multiple sites, involved the collection of data to a single location. This is what SCADA does, primarily the "DA" portion of SCADA, i.e. data acquisition. Some control was usually present but not a significant amount. The modern DCS, or distributed control system, could be described by taking each word of the acronym out and explaining it.
First, 'Distributed' implies that the functions are all distributed. These functions refer to the data collection, processing, controlling outputs, alarming, collecting historical data, etc. In a typical DCS system, you will find physical boxes that handle each of the above functions (well, almost). There is additionally an implication about geographical distribution, or that the functions can be distributed in different physical locations. This is a benefit in that prevents failure in one part of the system from affecting another part.
The word 'Control' implies the ability of the system to close the loop between an input measurement and a manipulated handle in the process. This means that the DCS shall have the capability for basic and advanced control algorithms.
The word 'System' implies that all of the above is connected as one contiguous system i.e. in simple words, one comprehensive system with systems and physical parts spread over potentially a wide area carrying out monitoring and control functions. A control system may have one or more PLCs (programmable Logic Controllers). The PLC is a term applied in different ways. In large process facilities, there is a requirement that there be two systems--one for control while another for safeguarding. The plant-wide safeguarding portion is typically done by a safety-certified PLC. However, smaller PLCs could be used in smaller single loop control and safeguarding applications as well.
PKumar68 May08
Meaning of PLC
there r 16th types of plc ok
RTU has the capability to control the I/O devices and to monitor the I/O devices, we need software like SCADA to access the data from the RTU. In case of DCS, both the controlling and monitoring things all done by the DCS itself.
Distributed Control System
Distributed Control System
DCS is advanced version of PLC and DCS works in real time frame while PLC not. There is no monitoring devices in PLC like DCS.
Smart Motor Control Center (MCC) allows digital communications between the DCS/PLC and electrical MCC. This avoids the need for interposing relays, minimizes wiring and makes diagnostic data available in DCS
caradon plc was taken over by novar plc,they have now been taken over by melrose plc. is this usefull
none. Siemens's APACS is an obsolete system and over time will be increasing difficult to maintain resulting in a higher total cost of ownership.
no
dcs is better
DCS Copy Protection
The population of DCS Europe is 235.
DCS Europe was created in 1994.
DCS : Distributed Control System
Wiztech Automation (Chennai), an ISO 9001:2008 Certified organization, based at Chennai, started in the year 2006 is one of the top MNC's providing services in industrial automation consulting, enhanced technical and unlimited practical 'hands-on training' in PLC, SCADA, VFD, Control panels, field instruments, DCS, Embedded Systems, VLSI. We are accredited as a CENTER OF EXCELLENCE by the INTERNATIONAL ACCREDITATION ORGANIZATION (IAO). PLC/SCADA/DCS/EMBEDDED/VLSI training is envisaged to update and widen the knowledge of the B.E/B.Tech/M.E/M.Tech/Diploma (ECE, EEE, E&I, BME, MECH, CHEM, CSE, IT) who are interested to have a better career in Industrial automation and Embedded System.
Elecrical Engineering is used in a steel plant in many forms... Power distribution. Various control systems typically PLC or DCS control. Data collection and networking. (grey area between engineering and IT)