Hi
I am designing a small system at work which will deposit liquid through a valve at a specific position. I have purchased a s7-1200 and will be using either a 2000ppr AB encoder or a 4000ppr AB encoder. I have set it up currently with the 2000. I have set up the HSC and adjusted the input filters to allow it to see each pulse and according to the documentation, in the AB mode using two inputs it will handle pulses at upto 80khz. The shaft I am attaching the encoder to will only turn at maybe one revolution per second. Maybe even two seconds for a revolution. It varies little in speed. So by my calculations this PLC is more than capable of doing the task. But yesterday a contractor said to me it won't work. I've got it set up and it appears to be working but he's saying when it goes faster it won't work, then he just walked away. Is there some other factor I don't know? Or does he just mean it wouldn't handle being on a much faster shaft? Any info would be appreciated. Thanks.
I am designing a small system at work which will deposit liquid through a valve at a specific position. I have purchased a s7-1200 and will be using either a 2000ppr AB encoder or a 4000ppr AB encoder. I have set it up currently with the 2000. I have set up the HSC and adjusted the input filters to allow it to see each pulse and according to the documentation, in the AB mode using two inputs it will handle pulses at upto 80khz. The shaft I am attaching the encoder to will only turn at maybe one revolution per second. Maybe even two seconds for a revolution. It varies little in speed. So by my calculations this PLC is more than capable of doing the task. But yesterday a contractor said to me it won't work. I've got it set up and it appears to be working but he's saying when it goes faster it won't work, then he just walked away. Is there some other factor I don't know? Or does he just mean it wouldn't handle being on a much faster shaft? Any info would be appreciated. Thanks.