Power Circuit, AI Dl Interface and Logic Control

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PROFIBUS

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 PROFIBUS PROFIBUS or Process Field Bus was introduced in 1989 and it is sometimes confused with PROFINET. It links plant automation modules with the process control. PROFIBUS uses a multi drop single cable to connect the devices. This method is cost effective especially for larger sites when compared to old methods. Its installation cost is low and it is easy to find faults as well because it is a single cable. Types of PROFIBUS There are two types or versions of PROFIBUS commonly known as 1.    PROFIBUS DP 2.    PROFIBUS PA Here is a brief introduction to both of these types. PROFIBUS DP It runs over two core screened cable that is violet sheathed and its speed varies from 9.6Kbps to 12Mbps. A particular speed can be chosen for a network to give enough time for communication with all the devices present in the network. If systems change slowly then lower communication speed is suitable and if the systems change quickly then effective ...
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IEC 61131-3 Programming FBD

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IEC 61131-3  is the third part (of 8) of the open  international standard   IEC 61131  for  programmable logic controllers , and was first published in December 1993 by the  IEC . The current (third) edition was published in February 2013. IEC 61131  deals with  programming languages  and defines two graphical and two textual  PLC  programming language standards: Ladder diagram  (LD), graphical Function block diagram  (FBD), graphical Structured text  (ST), textual Instruction list  (IL), textual Sequential function chart  (SFC), has elements to organize programs for sequential and  parallel control processing . Continuous Function Chart  (CFC). This language is an extension to the IEC 61131-3 standard, which gives free positioning of graphic elements. Notes: https://drive.google.com/file/d/0B-ZhnHb2X39pX1Y0WHJEMTdIWTQ/view?usp=sharing
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Industrial Safety Systems

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The Industrial Safety Systems and Their Types Industrial automation has minimized the human interaction with the machines but has not completely eliminated it. Industrial safety systems are introduced to protect the human who work in hazardous plants. Some examples of these are oil and gas, chemical and nuclear plants. The industrial safety systems not only protect the humans but also protect the environment and the plant itself from the chemical reactions. These systems do not control any process but in fact come into play when it is not possible to control a process through normal means. They are rather installed as a protective measure and are quickly becoming the need of every working environment. There are various types of safety systems in place and their use depends on the type of industry they are used in. Here is a look at some of them. Process Control Systems (PCS) They are installed for the monitoring of the manufacturing environment and they control the manufact...
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