Dumbfitter Posted September 17, 2018 Report Share Posted September 17, 2018 Hello all, I have a question about the high speed counter on a Samba. I have a SM70-J-RA22. I have a project that I would like to use that or a Vision on. The Project has a Gas flow meter that has a Prox switch on it that is rated for 8VDC. Per the instructions they recommend running the prox switch through an amp , the amp they recommend has relay outputs. At full flow we should be about 2 pulses a sec. So just to check to see how it would work I set a 1 sec pulse to output 0 and wired output 0 to HSC 0. I can probably just use a desecrate input and do a count and so forth but wanted to try this and see if it would work.What I noticed is the count is all over the place . Sometimes it adds 5 sometimes 10 and so on to the MI. If I look at the frequency its all over the place also. So what I tried is just wiring a switch to HSC0 and pressed the switch by hand to see what it was doing and noticed when I let go of the switch the same thing would happen but sometimes worse. I'm assuming its not a clean break when I let go but would there be that much bounce on a relay? Since its not a real fast count I'm thinking I can use just the Input and do a count but would like to know why the counter would not be working. Thanks for your help Remember I'm just a Dumbfitter so please keep it simple. Quote Link to comment Share on other sites More sharing options...
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