Am Dienstag, dem 19.11.2024 um 22:24 +0200 schrieb Viesturs Lācis: > otrd., 2024. g. 19. nov., plkst. 19:45 — lietotājs Peter Wallace > (<p...@mesanet.com>) rakstīja: > > > > I would check the 7I36 output voltage when disconnected from the > > VFD. If that > > seems ok, it may be a VFD EMI or grounding issue. This might > > require a line > > filter on the VFD, a common mode choke on the VFD wired going to > > the motor, or > > possibly a common mode coke on the analog signal/gnd wires going to > > the drive > > > > I have attached a screenshot from VFD's manual that shows control > terminal wiring. Those are "active low" inputs. > I have connected terminal-11 to "minus" of 7i37 outputs and > terminal-14 and terminal-15 to "plus" of each of 7i37 outputs. And > terminal-4 and terminal-5 with separate cable to analog output pins. > Is there any chance it could be caused by config? I had it working > previously in this machine, but I did change to better pc as the > initial was quite old and the realtime performance on bookworm was > bad. > Ok, I will check with disconnected cable.
I would also think there is some issue with ground (broken wire?) or with configuration (assuming hardware is OK of course) -- I got the same VFD in my Biesses, and although they seem a bit noisy (touchscreens nearby doen't work as soon as spindle starts despite shielded motor cables and proper grounding), vfd and motor work ok. analog signals are coming from 7i48, connected to pins 4 and 5. start/stop signals etc... is driven by original wiring and relay break out boards. regards Robert _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
