Recently I got hands on pendant DSQC 679 in our company shelf which has problem with display after drop. I Checked it inside and it was just display ribbon pulled out from connector due to heavy ferrite ring. I put it back assembly and try it on robot controller. I disconnect working pendant and connect one from shelf. Display Started to work but its stuck on boot or stuck on starting application. You can see video for stuck on boot here https://www.youtube.com/watch?v=Fc3wcvYXys4
After push Reset from bottom the boot load screen pass , image loaded from controller but then stuck on starting application.. You can see it on video here https://www.youtube.com/watch?v=GIyogUi5fB8
Any ideas why it is happening? Is it flexpendant pcb bad, that is not receiving or sending proper signals. Based on block diagram, all Enable and E-stop signals are independent from LAN communication and only one signal I'm suspecting is FPU-Start (Violet wire , pin 5 if you count from triangel mark on connector) which goes to the Robot controller. I cannot find original part from where that signal is coming. I tracked all other signals, but I cant find this one.
Maybe someone has schematic from where this output is originated. I doubt that someone will have complete drawing as it is proprietary but at least someone could have track connector signals to ICs, or Rs or Qs or Optocouplers.
Or can somebody from programmers explain me, what is process with loading and running application on Pendant? Its going to boot, then Loading image from controller and Starting application, but on what is depending start application? Can load from usb on pendant that application, or how I can test it without robot controller.
Or is it possible do emulation setup for robot controller on PC, so I can test pendant without present of robot controller? If I can, what software I will need
Thanks for any inputs.