Monday, August 17, 2015

Considerations and benefits of SCADA system




The development of increasingly complex industry requires a good integrated control system. The use of stand-alone machine control is not able to meet the needs of industry. SCADA system came into the most modern solutions today to meet the needs of an integrated automated control system. There are many considerations and benefits of using the SCADA.

Considerations and benefits of SCADA system

Overall control requirements

SCADA system which operates digitally and is designed for use in industrial environments, where the system uses a programmable memory for internal storage of instructions to implement specific functions such as logic, sequence, timing, counting and arithmetic operations to control the machine or processes through modules I / O digital and analog. Several overall control requirements need to be fulfilled before running as below:
  • Sequence logic
  • Analog loop control
  • Ratio and number of analog to digital points
  • Speed of control and data acquisition

Master/Operator control stations

SCADA provides system monitoring, control and automation functions that enable companies to improve operational reliability, reduce costs, improve the overall quality of the Operational Service and improve employee safety. Consider these items below to optimize your system:
  • Type of displays required
  • Historical archiving requirements

System consideration

SCADA system provides flexibility in arranging and configuring the system, by placing sensors and controls at every critical point in the process of being addressed, it is usually used for early warning from a distance. The control optimization industry is often used for monitoring by SCADA system. Many industries uses this system to run their control system with several consideration as below:
  • Reliability/availability
  • Speed of communications/update time/system scan rates
  • System redundancy
  • Expansion capability
  • Application software and modeling

The Benefits of SCADA Implementation

SCADA systems have the ability to learn the process. The more things can be monitored, the details of the operation that could be seen and everything works in real time. No matter as complex as any process that handled all can be seen on a large scale or small, thus all the errors that occur can be traced, and the data can be directly controlled because the data is centralized and distributed.
Obviously a SCADA system's initial cost has to be justified.  A few typical reasons for implementing a SCADA system are:
  • Improved operation of the plant or process resulting in savings due to optimization of the system
  • Increased productivity of the personnel
  • Improved safety of the system due to better information and improved control
  • Protection of the plant equipment
  • Safeguarding the environment from a failure of the system
  • Improved energy savings due to optimization of the plant
  • Improved and quicker receipt of data so that clients can be invoiced more quickly and accurately

SCADA system includes:

  • Human Machine Interface (HMI) which is the interface with humans. The data can be viewed via the HMI process.
  • Supervisory devices (surveillance) which is usually a computer. Get data from the device will then be sent a command to process.
  • Remote Terminal Unit (RTU), SCADA system devices need connected to the sensors and sends the data to the supervisory system.
  • Synchronize communication infrastructure between supervisory with RTU


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