What is the difference between dcs plc scada

Schneider-Electric guarantees all control software to be forward compatible, which allows the end client to take advantage to replace hardware with the latest technology without the expense of replacing the control software.

The combination of a PLC, that is capable of passing field meta data without programming, with an open SCADA-MES platform that allows the integration of multiple vendor software solutions, could prove a to be a solution in the coming fourth industrial revolution.

Through the use of a patented universal algorithm, an unconventional single layer software architecture can be utilised. A single layer architecture is simpler compared to the conventional architectures currently used in the industry. As the interface consists of eight parameters connection pins , the learning curve is short and programming can be done with minimum skill and effort similar to that of building with Lego bricks.

As the library is built with standard PLC programming techniques, the software modules and data structures of the library can be extended with user-defined data structures allowing for custom-made integration of control functionalities for batch control, motion control, MES and energy consumption.

PLC-Easy offers the possibility to integrate any hardware diagnostic signals of any type of device from any vendor. This allows accurate and instantaneous fault diagnoses and sequence of events analysis by the operator. Because more than 90 per cent of the software created with PLC-Easy consists of standard, tested software modules, the amount of unique software, and therefore complexity, is reduced by at least 50 per cent. The almost per cent utilisation of standard, tested modules, makes the control software and functionality predictable and reliable as the complexity and subsequent susceptibility to faults and downtime is reduced.

PLC-Easy, theoretically, reduces the amount of software by at least 30 per cent, however empirically the reduction is a multitude of 30 per cent.

For the recent pilot project, 47 sheets of code were replaced by five sheets of code per cent. It offers unlimited functional redundancy in any configuration and at any level of the ISA88 physical model configured with basic programming skills. Its speed developing and diagnosing , ease of use and simplicity are key features. This implies that the system is not critical to control the process in real time, as there is a separate or integrated real-time automated control system that can respond quickly enough to compensate for process changes within the time constants of the process.

PLC:for simple batch control i. Can handle a no. It is the time that the process takes to come to normal operation after a catastrophic failure.

PLC: Downtime results in only lost production and does not typically damage the process conditions or equipment. For eg. DCS: Downtime results not only in lost production but also leads to dangerous conditions or damages the process line and resuming the process is expensive and difficult too. PLC:It delivers a tool-kit of functions and building blocks that can be easily customized. So it can be used for varied applications by programming it according to the application.

DCS: Its highest priority is high reliability so standard functions are baked in to provide a complete solution to a particular application. In a narrow sense, DCS is mainly used for process automation, PLC is mainly used for factory automation production line , and SCADA is mainly for wide-area needs, if they are unified from the perspective of computers and networks, the reason why they are different is mainly In terms of application requirements, and DCS often requires advanced control algorithms.

For example, in the oil refining industry, PLC requires high processing speed, because it is often used in interlocking and even fail-safe systems. SCADA also has some special requirements, such as vibration monitoring, flow Calculation, adjustment of peak and valley. The PLC system, which is the Programmable Logic Controller , is suitable for the measurement control of the industrial site.

The site measurement and control function is strong, the performance is stable, the reliability is high, the technology is mature, the use is widespread, and the price is reasonable. The DCS system, that is, the distributed control system , belongs to the international advanced level large-scale control system in the s.