- Yokogawa – Centum Excel , CS 3000, CS 5000
- Fisher - Rosemant - Delta V
- Honeywell - TDC 3000, GUS
- ABB - Freelance 2000
- Moore - APACS
- Fox boro - I/A series
Monday, 19 December 2011
Diffrence between PLC and DCS
The traditional system, monitoring processes across multiple locations, involved the collection of data to a single location. This is what SCADA does, basically the "DA(data acquisition)" portion of SCADA. 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 at various locations. 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.
PLC Simplified with limited logic control for like a machine or Simple process with limited interlock logic - progamme can be modified easily.This will give only indication of failure.No recording the event or process parameter ,with limited memory.Cost wise it is very cheap.
DCS concern Huge multiple logic controlls with greater than 1000 of inter lock for process of power plant or refineries or any process Industries it will give all types of alarm in soft copy & hard copy about process , failure & record all the process input & out put parameters & efficiency if required .(Boiler,Turbine, Generator controlls Switch gear cotrolls ie power generation to Transmission.) Very Large memory back up, failuer rate very less,process parameter all are fixed cannot be changed by Individual. Troubleshooting very easy . Production will not be affected at all.
Fully integrated DCS System:
The ADVANTAGES were greatly reduced wiring costs, much more limited failure and less cost to add more points. The DISADVANTAGES were that wiring costs were that wiring costs were still significant and there was lack of interoperability among controllers of various manufacturers due to the proprietary protocols. Hence the user was locked into a single vendor.
Popular DCS Systems Available:
Diffrence between PLC and DCS
comparison of PLC and DCS|Diffrence between PLC and DCS|distributed control system|programmable Logic Controllers|
PLC Ladder PLC Practice Problem PLC Ladder Programming training & tutorials Free Training on PLC Ladder Programming training & tutorials PLC Ladder Logic PLC Timer SCADA Basic PLC Ladder Programming Examples Delta PLC PLC & Visual Basic Communication PLC Definition Introduction PLC Error PLC Error LED RSLinx Tutorial Types of Timers in PLC ladder logic Programming programmable Logic Controllers AB addressing ABB AC Drive AC Drive training cource Actuators Advantages and Disadvantages Addressing of Allen Bradley PLC Micrologix 1000 Addressing of Delta PLC DVP SS/ES/EX Addressing of Mitsubishi PLC FX2N Addressing of Modicon PLC Micro TSX 3722 Addressing of Siemens PLC S7 200 Advantages & Disadvantages of RTD Advantages & Disadvantages of all types Sensors Advantages of SCADA Allen Bradley PLC PWM (Pulse Width Modulation) error codes Allen Bradley SLC Controller Error Codes Ampere Voltage Ratings of circuit brakers Analog addressing Allen bradley Analog input in Allen Bradley PLC Applications of Sensors Capacitive Proximity Sensors blck diagram Capacitive proximity sensors Circuit brakers Circuit diagram of motor starter Communication Between two E1000 HMI and mitsubishi Fx2n PLC Communication between FX3U PLC and SCADA via RS485BD Configuring the DF1 Driver using RSLinx Configuring the Ethernet Driver Connection between 2 E-Terminals and FX2N PLC. DOL Motor Starter PLC logic DOP Series Human Machine Interface DVP14ss Delta HMI Delta HMI Program Download.Delta HMI Communication Cable Delta HMI and RS485 Communication Delta MMI Delta PLC Projects Delta PLC input output addressing Different types of Special motor Diffrence between PLC and DCS Ebook on Basics of Allen Bradley PLC pdf Ebook on Basics of Siemens PLC pdf Ebook on Basics of VFD PDF download Electrical maintenannce tips Electromagnetic relay Error Messages from RSLogix Emulate 500 Failsafe meaning Features of Delta HMI/MMI Following are the Free PLC Software's available from all leading brands such as Allen Bradley Free PLC Ebooks Free PLC SCADA TRAINNING & TUTORIAL Free PLC Training Full form of HART HART OSI reference model HART protocol structure HMI & ZIGBEE How Capacitive Proximity Sensors Works? How Inductive Proximity Sensor Works? How Ultrasonic Sensors Works? How to Select a Suitable Motor How to Select the Right VFD (Inverter) or AC Motor Drive Ladder Logic for AND Ladder Program for Automatic Door open close Ladder Programs for Gates List of Top Most Widely used PLC’s in the Industry List of Widley used PLC Companies. Low cost Wireless I/O’s using PLC Mitsubishi Mitsubishi PLC FX2N & HMI E1000 Networking using BDTP Technology Mitsubishi PLC input output addressing Modbus Communication Modbus Ethernet Modbus Serial Modbus.dll for Visual Basic Mormally open Contact Normally Close Contact Explained Motion Actuators Motor starter in control circuit NAND NO NC Explained NOR Gates with Truth Tables Nashik Nexgenie PLC Features Nexgenie PLC Port Nexgenie PLC input output OFF Delay Timer OLE for Process and Control ON Delay Timer OR Omron On line Ladder Program Editing for RSLogix 500 On line Ladder changes Online Editing Ladder Program Online Servo tuning PID Control Instruction PID PLC PID instruction in Allen Bradley PLC PLC & VB PLC Counter PLC Error Allen Bradley PLC Error messages in Allen Bradley PLC FBD PLC Fault PLC Industrial Automation Training Institute PLC ON Delay Timer PLC Run Led PLC SCADA Communication PLC SCADA DCS Training Centers PLC SCADA Driver PLC SCADA Training Chennai PLC and ZIGBEE PLC application PLC based Automated Guided Vehicle PLC based Final year Project PLC based Line follower robot PLC based Project Report PLC functional Block Diagram PLC input wiring PLC interview Question PLC interview questions PLC maiintence PLC power LED PLC program for star delta starter PLC retentive timer PLC training in Delhi PLC training in Mumbai PLC training in Pune PTO Allen Bradley PTO [Pulse Train Output] Instruction in Allen Bradley PLC Photoelectric Sensor Applications Photoelectric Sensor Applications in Automation industry Power cable Selection Proficy HMI/SCADA Cimplicity 8.1 Programming Languages for PLC Proximity sensor application Push to ON PUSH to OFF PLC program using NO NC and Coil Pwm RSLinx Tutorial | Configuring the DF1 Driver RSLinx Tutorial | Configuring the Ethernet Driver Scaling Analog Input using SCL Instruction in PLC [Scale Data] Schneider Schneider PLC addressing Selction of Servo Motor Selction of Stepper Motor Selection of AC Motor Selection of VFD Selection of stepper or Servo Motor Sensor applications Servo Motor Servo auto tuning Parameters Siemens Siemens input output addressing Signal Cables selection Simatic Wincc SCADA Single Push button to on and off motor Sinking and sourcing operations Softwares used in SCADA Solid State Relay construction Solid State Relay uses and Advantages Sourcing and Sinking Concept in PLC Standard Wiring Color Codes Stepper Motor Applications and Advantages Disadvantages Stepper application Stepper motor Selection Stepper motor and PLC Tag in SCADA Temperature sensors used with PLC Theory of Capacitive Proximity Sensors Theory of Ultrasonic Sensors Theory or Operation of Inductive Proximity Sensors Thermistor & Temp IC Sensors Thermocouple Trial Run of PLC Troubleshooting Allen Bradley PLC with RSLogix Emulate 500 Troubleshooting Tips for Electrical /Electronic Maintenance Tutorial on PLC Types of Actuators Types of Actuators used for Motion in Automation with Advantages & Disadvantages Types of Sensors Types of Timers in PLC | ON Delay Timer (TON) Typical circuit diagram of Star Delta starter Ultrasonic Sensor Applications Ultrasonic sensors Unitronics VB 6.0 and PLC VIsual Basic as SCADA What is HART What is SCADA (Supervisory Control And Data Acquisition) What is SMART Communication What is a PLC ? What is DCS? What is the difference between PLC and Microcontroller? XIO [Examine if Open] & XIC [Examine if Closed] Explained advantages & disadvantages of Servo Motors anlog input addressing DELTA PLC anlog input addressing Mitsubishi PLC anlog input addressing siemens automation training comparison of PLC and DCS connecting field devices to Programmable Logic Controllers contact reting of relay design of fail safe systems digital common ground connections distributed control system drawbacks of Servo Motor fail safe PLC Redundancy modbus examples noise in cables one input one output PLC program using NO NC logic opc overload relay operation photoelectric plc Response Time plc output wiring plc program for TV remote plc training programmable Logic Controllers List relay coil rating relay driving circuit relay isolation voltage selection of relay servo basics servo training star delta starter control wiring diagram types of Counter typical circuit diagram of Direct on line starter