ponchpmorelos Posted June 18, 2012 Report Share Posted June 18, 2012 Hi Everybody I'm working on a project where i need a pulse sequence with a frequency of 1 kHz to 10 kHz to control a stepper motor with a drive which only needs 1 input I'm using a M91-T1-2 and i configured hardware the next way: And then i use the next ladder program to enable the output and to put the frequency's value: My question is: with this configuration i' should get 1 kHz in the output 0? or i need to do something else because i don't get any Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted June 19, 2012 MVP 2022 Report Share Posted June 19, 2012 You need to set MI 12 to 500 to get a 50% duty cycle. My guess is right now it's = 0. Joe T. Quote Link to comment Share on other sites More sharing options...
ponchpmorelos Posted June 21, 2012 Author Report Share Posted June 21, 2012 I set the MI 12 to 500 and it worked fine for 1000 Hz, then i set MI to 10 kHz and it went well but the voltage decreased from +24 V to +5 V, after that i tried to set MI 20 kHz and it stuck at 10 kHz. Which is the highest frequency for these PLC's outputs ? (i assume is 1,500 Hz because it's pnp) i ask because i need to work in the range of 10 kHz to 50 kHz, Do i need to change the plc or this plc can work at this range? Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted June 22, 2012 MVP 2022 Report Share Posted June 22, 2012 My experience with the pnp "high speed" output is that it poops out at 2 kHz. I didn't register the frequency you're looking for in your original post. The new V130 models with npn high speed outputs work great for the frequencies you need- they go up to 200 kHz. The M91 is a mature product and you won't see anything new introduced in this line. You're going to have to step up to a V130-33-TR20. Joe T. Quote Link to comment Share on other sites More sharing options...
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