6602 - How many quad counter inputs?

[chassan]

Hello,

I know a (PXI) 6602 has 8 counters on it.

1. Can each counter on a 6602 card accept a quadrature encoder input (for a total of 8 quad encoder input channels per 6602 card)?

It seems to me that once upon a time I used a card that required two counters to receive 1 quadrature encoder input...maybe an M-series 6221?

Best Regards,

Chris

[Efrain_G]

Dear chassan,

You need two counters for every quadrature encoder so that you can sense the direction of your counting. Either counting up or down. Please look at this link in our website:

http://zone.ni.com/devzone/cda/tut/p/id/4623

[chassan]

Hello Efrain G,

Thanks for the reply.  However, the link you provided primarily discusses the E-series cards.

1. Do the E-series and 6602 cards use the same counter/timer hardware?

2. Is it correct to say that a 6602 card is only capable of accepting 4 quadrature encoder inputs even though each counter has input terminals for A, B, and Z?

Thanks,

Chris

[Efrain_G]

Sure chassan,

That link is for the E-series cards, but the concept still applies for any quadrature encoder.

Since many counting tasks require more than one counter, most of our boards have auxiliary counters attached to every counter. This is the case for the 6602.

You should be able to do 8 "A,B,Z" counting tasks on your 6602.