Differentiate between PLC, SCADA and DCS systems
Answer / kush rao
SCADA
A SCADA (or supervisory control and data acquisition) system. It consists of many remote terminals units for collection of data (field),that is being connected with master station through any communication system, having main task of collection of accurate data and controlling of process for smooth operation.
DCS
It stands for distributed Control System, controlling is performed by embedded system (Microcontroller based or Microprocessor based controlling unit for device or instruments from which data is to be collect. It provides very intelligent analog control capability. It is very sensitive for HMI (Human machine Interface) for easy and smooth control of process.
PLC
It stands for Programmable Logic controller, having get this name from the fact that it replace the relay logic at the initial stage then it get the capability for analog channels also for display then it get the ability for close loop control and after some time it has the ability for redundant operation, and also its HMI having the ability for Indicatiion,controlling,data logging ,Alarming and backup data facility. It is also defined as below:
“A digitally operating electronic apparatus which uses a programmable memory for the internal storage of instructions for implementing specific functions, such as logic, sequencing, timing, counting and arithmetic, to control through digital or analog input/output, various types of machines or process.”
Is This Answer Correct ? | 13 Yes | 1 No |
Why ues 250 ohms Resistor during hart type instruments calibration with hart protocol in details ?
in transmiters(rose mount) how to check output 4-20ma ? and input 24v? i need exact explanation?
How to convert 0-2500mmH2o into kg/hr? Or how to convert mmH2O into kg/hr,t/hr etc
can we change the range of 3151 model level transmitter of rosemount make? present calibration range is 1000mmwc and want to change it to 2000mmwc
What is i/e or o/p transmitter(ma/v)?
what master plc do?
How to check electrical health of Vibration probe?
hi vishok this is noor plz tell me what type problems will occured i use T/C in the place of RTD in (FEED WATER TANK),plz send ur e-mail address to my ID (mail2noor.hyd@gmail.com)
What is the exact differences between HART,FOUNDATION FIELDBUS,PROFIBUS?
What is surge in compressors? How to detect and control it?
what is meaning of software redundency and hardware redundency?
How can I read the electrical drawing easily?