Tuesday, March 27, 2012

PLC Language for Modern Machineries





Someone who deals with PLC (Programmable Logic Controller) are requires mastering at least the basic of PLC language. This is because PLC runs heavy machines, such as those in assembly line of a factory, light fixtures and amusement rides. Though the programs run those machines automatically, the programming for the digital computer should be handled carefully. Hence, those who are responsible for the programming must master the PLC language.

PLC Language with the International Standard
There is a lot of PLC language available for the automation of electromechanical machinery processes in accordance with the international standards. And here is the variety of the programming languages based on the international standard:
• Sequential Function Charts (SFC)
• Ladder diagram (LD)
• Structured Text (ST)
• Function Block Diagram (FBD)
• Instruction List (IL)

There are many benefits that you can have when you use the language from the international standard. One of them is that you use several languages for the same programmable controller. This enables the developer of the program to choose the best language that is suitable for certain task. That is why, the most important thing that a program developer should do is he or she should know the exact function of a certain language for a particular task. He or she should comprehend this well, and so the PLC language will function in their best usage.

PLC Language of the Ladder Logic
PLC has gone through long history and development, and so has the PLC language. At first, the language for PLC was designed in some kind of ladder logic. The ladder logic can relay the logic systems. However, this ladder logic was no longer suitable for modern PLC programming. The modern PLC programming combines the ladder logic with other programming languages, such as Basic and C. Indeed the programming languages keep developing. Even, the more modern programming languages also use state logic language. This is more advanced level of programming language. The state logic is designed to create PLC programming that is based on the diagrams of state transition. Recent development of the PLC is that the PLC is getting more intelligent. Today, PLC has been operated with the integration of the electrical network. The integration for both PLC and electrical network is supported by SCADA, i.e. Supervisory Control and Data Acquisition. It seems that the PLC will still keep developing, and so does the PLC language to make the user easier to operate.


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