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General => Technical support => Topic started by: cch1955 on July 24, 2006, 02:32:34 PM

Title: HS counters and quadrature encoders
Post by: cch1955 on July 24, 2006, 02:32:34 PM

I am working on a small project that uses T100MD with two encoders. If I am using the HS counters 3&4 , 5&6,  I am unclear on decoding multiplier to the HS count register. To be clear: If I have 100 line encoder, will it change the counter by 100 per revolution or 400 per revolution? I am only running at 550 rpm so speed should be fine.

Thanks
Chris

Title: Re:HS counters and quadrature encoders
Post by: support on July 25, 2006, 09:22:52 AM

If your encoder outputs 100 pulses on either phase per revolution, then the HSC will count up or count down 100 per turn of the encoder. The easiest way is to connect your encoder to the PLC and run the HSC sample program, then turn the encoder 1 revolution to see how much the HSC increment/decrement.

Title: Re:HS counters and quadrature encoders
Post by: cch1955 on July 25, 2006, 09:43:32 AM

So I understand 100 counts in HSC for 100 lines of encoder disk.

A&B not additive to give 200 counts per revolution. No multiplier like 4X to give 400 counts per revolution with 100 line encoder as in some interface.

I will test when have encoder interface.

Thank you for clarification
Chris
 :)