29-08-2014, 09:56 AM
Understanding The Working And Analysing The Plc Program Of Six-head Vertical Coiling Machine
Royal Philips Electronics of the Netherlands is a diversified Health and Well-being company, focused on improving people’s lives through timely innovations. As a world leader in healthcare, lifestyle and lighting, Philips integrates technologies and design into people-centric solutions, based on fundamental customer insights and the brand promise of “Sense and Simplicity”. The process in each of the 6 machine positions is more or less like this: the mandrel is unwound from a reel, passed once round the guide drum and, via a pulley, is fed through a hollow flyer shaft and a mandrel guide fitted in the shaft. The Flyer motor drives the shaft that carries the reel of coil wire which, in the coiling operation, is flung in a loop against the flyer pot inside the centrifugal force. Via the lower side of a contact ring the coil wire passes to the mandrel, moves past the tip of the mandrel guide and is then wound round the mandrel. Via two guide pulleys, the lower side of the guide drum and another pulley the “coil- wrapped” mandrel is fed to a rece
Definition of PLC A Programmable Logic Controller is a real time digital
computer that is primarily used for the purpose of AUTOMATION. PLC is a very handy and compact replacement to the systems which were used to perform the tasks now overtaken or in other words Simplified (at a certain level) with its INVENTION. The Functions which were being performed by electromechanical components like relays, mechanical conters and timers etc are now done using PLC’s. It is being used in many industries for controlling the action of machines, assembly lines and many other electromechanical processes those are related with automation. (7.1 - Siemens S7-200 PLC) PLC is specially designed to withstand the harsh industrial environment. Creation is done such that the external factors like electrical noise, physical impact, vibration due to operation of the machine have minimal effect on the internal structure and the OUTPUT of the device. The PLC has a large number of input and output ports, depending on the model being used. Output results must be produced in response to input conditions within a bounded time, otherwise unintended operation will result. Step-7 Micro/Win is fully equipped software that allows users to create PLC Programs in an uncomplicated manner. The programming on the software does not require previous knowledge of any computer language. It supports various PLC models like S7-200, S7-300, etc. Exceptionally powerful tools make daily work easier and also save time of the programmer. The interactive control panel makes it even more efficient. This software package can be handled like a standard Windows application and includes all necessary tools for convenient programming of the SIMATIC S7- 200. (8.1 - Start Page of Step-7 Micro/WIN) The Step-7 Software provides the users with a lot of options to implement the same logic. i.e using the different components that are available. It contains a variety of components that can be used to construct a program. Timers (ON-delay, OFF-delay, Retentive), Switches(NO, NC), Logic Gates(AND, OR, XOR etc), Memory(Retentive, Non-Retentive) and many more components that can be thought of while preparing a program.