Hi,
Maybe someone has an idea or has experience something similar. I have few safety IO output modules (1734-OB8S) installed behind the 1734-EP24VDC.
On them I have connected safety signals to few VFD drives (ABB VFD). Everything works perfectly when forcing the outputs and i can see the safety signals turn on in the drive (while drive is inactive). But with one drive it happens that it starts the ID run (first motor identification) and it cannot finish it as somehow the safety output card faults (like the voltage drops and turns off all outputs but reboot without error message-at least I could not find the fault information). Rest of the VFDs are ok, I managed to go through ID run and also start the rotation but this drive is just not going through.
I did try to swap the IO card but the same happens. Running out of ideas, right now I am suspecting at the VFD, but strange thing is that it doesn't faults the module immediately on the run command, but the id run is for at least good 10s until it happens. If the drive would be bad and shorting somehow somewhere I would suspect it would immediately fault the IO module..
Maybe someone has an idea or has experience something similar. I have few safety IO output modules (1734-OB8S) installed behind the 1734-EP24VDC.
On them I have connected safety signals to few VFD drives (ABB VFD). Everything works perfectly when forcing the outputs and i can see the safety signals turn on in the drive (while drive is inactive). But with one drive it happens that it starts the ID run (first motor identification) and it cannot finish it as somehow the safety output card faults (like the voltage drops and turns off all outputs but reboot without error message-at least I could not find the fault information). Rest of the VFDs are ok, I managed to go through ID run and also start the rotation but this drive is just not going through.
I did try to swap the IO card but the same happens. Running out of ideas, right now I am suspecting at the VFD, but strange thing is that it doesn't faults the module immediately on the run command, but the id run is for at least good 10s until it happens. If the drive would be bad and shorting somehow somewhere I would suspect it would immediately fault the IO module..