I used halshow to temporarily change the sserial error-lim parameter. Then I set a watch on the error counter and I didn’t see it move. It appears that I don’t get any SSerial errors. Is my test valid?
For confirmation on your assessment of the noise levels, here is a look at the voltage on the differential signals. > On Aug 7, 2020, at 1:18 PM, Peter C. Wallace <p...@mesanet.com> wrote: > > On Fri, 7 Aug 2020, Thaddeus Waldner wrote: > >> Date: Fri, 7 Aug 2020 13:07:04 -0500 >> From: Thaddeus Waldner <thadw...@gmail.com> >> 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] 7i73 Lagging jog key >> I finally got to do a little troubleshooting and hereџџs what I found: > > Key response on the keypad is never as fast as the on-screen UI but it is > consistent. Iџџm guessing thereџџs about a 100-300 ms delay but thatџџs just > a guess. Could this delay be due to the fact that this is a scanning keypad? > What is the scan rate on > > Once the inverter starts, I get a LOT of noise on the SmartSerial lines. The > noise voltage is around 4v as measured from the 7i73 ground but it spikes to > higher than that. Frequency is about 40khz but itџџs not consistent. > > The noise on the 5v power supply line to the 7i73 is minimal. The 7i73 and > all its connected switches are grounded only through the boardџџs connection > to the 7i96 board. > > Would a shielded ethernet cable help? > >> On Jul 31, 2020, at 9:17 AM, andy pugh <bodge...@gmail.com> wrote: >> On Fri, 31 Jul 2020 at 15:15, Peter C. Wallace <p...@mesanet.com> wrote: >>> Also even with default sserial error management you could only have >>> 10 servo thread cycles (10 ms with a 1 ms servo thread) of delay >>> due to failed transactions before a sserial error popup would occur. >> Maybe noise on the keyboard itself? Is the keycode pin a single clean >> transition? >> -- >> atp >> "A motorcycle is a bicycle with a pandemonium attachment and is >> designed for the especial use of mechanical geniuses, daredevils and >> lunatics." >> џџ George Fitch, Atlanta Constitution Newspaper, 1912 >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > 4V of noise should be OK (its within the common mode range of the > differential recievers which is -7 to +12V ) as long as you do not get > sserial errors I dont think this is the cause of your delays. You can see if > you get _any_ sserial errors by setting the error threshold to 1 > > > Peter Wallace > Mesa Electronics > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
