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| 2/23/2009 5:01 AM | |
Joined: 9/27/2006 Last visit: 11/4/2024 Posts: 12293 Rating:
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Hello Uganda; Your's is a very tall order to fill out, especially with so little details. So this can only be very general, until you come back with a lot more information. There are lots of ressources on PLCs, on their history, uses, training and tutorials. Just look at the web. For example: http://www.plcdev.com/plc_basics PLCs were first developped to replace hardwired relay logic in machine control panel in industrial plants. They proved over the years to be a simple, understandable (by the plant floor people) and maintainable technology; they can connect to a large varietyu of digital and analog circuits, and can control many different types of machines (including motors and drives, yes). In associatioon with HMI panels and SCADA software, they give the plant technicians a complete monitoring and control overview of their process. But most of the available information is dedicated to the various manufacturers of these machines, Siemens, Rockwell (Allen-Bradley, GE Fanuc, Koyo, to name a few. So the first question you will need to ask is what model are you planning to use. Most PLCs share the same basic functionnalities, but the details differ greatly between providers: types of CPU, functions of the different I/O modules, communication networks supported, programming interfaces.... If this is a first incursion in the programming of a PLC, then i would recommend you look at the available support in your surrounding area. Your main source of information, documentation and training will come from the local support, so make sure you evaluate correctly their capacity and interest in helping you out once the procurement of the material has been finalised. Don't get caught with a "mailbox", however good the PLC brand you are going to purchase, local support is your best bet. Hope this helps, Daniel Chartier |
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