Hi,

I need to quote for the project and I am not sure how I would fare up against a commercial PLC. I think a commercial PLC would be cheaper !!! Actually my client wants the students taking the classes to have a clear understanding of Motor Drives and the control logic behind that. Since the application is limited to only motor control functions, I need to define the SFB (Special Function Blocks) before I start the actual coding. Since there would be only two types of motor connected, AC Induction and DC motor so the motor's electrical and mechanical parameters would be quite fixed. May be I should study commercial Motor Drives and write a flexible application to customize it via the PC software. My concern is that the system should be capable to some extent, not just a lame one. Cause it will be used as a tool to to teach college students on drives during summer camp or science fair. It need not be complicated but should have a technically right approach (To get my payments through!!!)