On Monday, 18 April 2022 17:33:48 EDT Peter C. Wallace wrote: > On Mon, 18 Apr 2022, gene heskett wrote: > > Date: Mon, 18 Apr 2022 16:37:48 -0400 > > From: gene heskett <ghesk...@shentel.net> > > Reply-To: "Enhanced Machine Controller (EMC)" > > > > <emc-users@lists.sourceforge.net> > > > > To: "Enhanced Machine Controller (EMC)" > > <emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] nother Q > > for Peter > > > > On Monday, 18 April 2022 13:49:36 EDT gene heskett wrote: > >> On Monday, 18 April 2022 10:38:10 EDT Peter C. Wallace wrote: > >>> On Mon, 18 Apr 2022, gene heskett wrote: > >>>> Date: Mon, 18 Apr 2022 04:19:27 -0400 > >>>> From: gene heskett <ghesk...@shentel.net> > >>>> Reply-To: "Enhanced Machine Controller (EMC)" > >>>> > >>>> <emc-users@lists.sourceforge.net> > >>>> > >>>> To: "Enhanced Machine Controller (EMC)" > >>>> <emc-users@lists.sourceforge.net> Subject: [Emc-users] nother Q > >>>> for > >>>> Peter > >>>> > >>>> Greetings; > >>>> > >>>> How does the A/D on a 7i76D handle overvoltage? I'm considering a > >>>> long > >>>> tailed vfet pair with a 22k pullup to 42 volts. Does it just goto > >>>> full > >>>> scale at an $FF output, or will that blow something? > >>> > >>> Full scale (inputs will take up to 100V indefinitely) > >>> but adjacent inputs may read incorrectly if more than about > >>> 50V is suppled (due to current injection into parasitic > >>> transistors related to the input ESD diodes of the CPU) > >> > >> Excellent news Peter, I'm off to the races then. > > > > But the starting gate won't open. I've re-read 7i76man.pdf several > > times w/o the method of actually getting the digital value from one > > of the 4 ports it works for. I have something tied to port-0, but I > > think that may be a leftover from before I used the hy-485 module to > > drive the spindle, so it looks like I should figure on using port-1. > > > > How does reading an A/D derived digital value from port-1 get done in > > the hal file? > > > > Thank you. > > > > Cheers, Gene Heskett. > > -- > > "There are four boxes to be used in defense of liberty: > > soap, ballot, jury, and ammo. Please use in that order." > > -Ed Howdershelt (Author, 1940) > > If we desire respect for the law, we must first make the law > > respectable. - Louis D. Brandeis > > The pins are: > > hm2_5i25.0.7i76.0.0.analogin0 > hm2_5i25.0.7i76.0.0.analogin1 > hm2_5i25.0.7i76.0.0.analogin2 > hm2_5i25.0.7i76.0.0.analogin3 > > > You need to set the 7I76 in a mode that enables the analog inputs > (modes 1 or 2) > That sounds like it should be a setp, but it doesn't jump off of page 31 at me. Looking at the analogin0, I'm seeing a flash of noise at about 1 second intervals which I assume is the update rate. And I don't currently have any setp's that seem to address the 7i76. Do I need to dl a fresh copy of the 7i76man.pdf? I've had this one for 3, maybe 4 years.
> > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > Peter Wallace > Mesa Electronics > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > . Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
