IEC is an IEC standard for programmable controllers. It was known as IEC before the change in numbering system by IEC. The parts of the IEC. IEC Edition INTERNATIONAL. STANDARD. NORME. INTERNATIONALE. Programmable controllers –. Part 6: Functional safety. View Abstract. Product Details. Detail Summary. View all details. Active, Most Current. RU. Additional Comments: RUSSIAN * SAME AS IEC Format.
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Design requirements specification contents. SW safety validation planning. As a check, the whole text is returned.
Fill in your details below or click an icon to log in: As an example, a small PLC library for message logging is created. As qualified versus as shipped. It means that the original functionality of a module can be changed through the usage of the extension modules.
In the Write method, an IF statement distinguishes different variants and calls the ice private method respectively. The file extension serves as an identifier of the file format in this case. You are commenting using your WordPress. You are commenting using your Facebook account.
Open Closed Principle Object-oriented programming defines several so-called principles. This part does not cover general safety requirements for an FS-PLC such as requirements related iiec electric iecc and fire hazards specified in IEC FS-PLC operation, maintenance and modification procedures.
Sorry, your blog cannot share posts by email. The Write method of the logger can be accessed through this interface. Notify me of new comments via email. Two parameters define the user name and the password, while the third one contains connection data for the database.
Variant 1: A simple function block
However, if the user would like to use optionally a CSV or XML file instead of the simple text file, the developer should expand the block. As the example shows, a class factory helps by implementing this 6113-16 Closed Principle.
HW operation and maintenance procedures. HW requirements for the control of systematic faults.
Standards New Zealand :: Programmable controllers – Part 6: Functional safety
This block implements the interface ILogger and consequently the Write method. In this way, an abstract function block can be compared with an interface. Thus, functionality is added to the function block through this reference.
This is possible, because the dependencies of the function blocks between themselves were changed. Classification of engineering tools. One of these principles is Open Closed Priciple, i. In this case, a function block is defined the actual class factorywhich provides a reference to another function block through a method. A factory can be implemented in different ways. In order to be able to use it in our example, the methods WriteTxtWriteCsv and WriteXml are transformed into separate function blocks.
The dynamically created function block is assigned to the variable ipLogger in lines 14, 17 and The interface ILogger simplifies developing further variants. Abstract function blocks do not obtain any functionalities. An abstract class factory allows the user to adjust the library range of functions without changing the sources.
The method can be expanded by its own parameters, which are forwarded as an instance is declared.
This layer is however an abstract one. A class factory can help to break these oec structures. Management of functional safety. Stefan Henneken Chief Spaghetti Coder. This path defines in which file the messages are saved. In this example, on startup of the application. Fault insertion test requirements. Post was not sent – check your email addresses!
HW classification of faults.