Unable to connect to UC300ETH!

[Victor]

Dear,

I’m having such a strange problem. Yesterday, it was impossible to connect to the uc300eth. Last time a couple of days ago it worked fine. I’ve tried everything, and over and over again. Resetting, ip settings, UC utility, different cables etc. Voltage from psu is perfect. No ide cables attached to the board.
The strange thing is that the green led of the ethernet connector is always on, even if the cable is out, and also after resetting. The green board led is signaling ”long, short, long short”.

The least long shoot explanation is that I vaccumed the workshop computer (don’t remember that specificly, but I remember vaccuming) during milling and that a static shock have hit the computer and struck the uc300eth via the ethernet cable. The program went fully through, but perhaps the code was already buffered. Strange that it did not affect anything in the milling thou, if the uc300 got busted.

One thing that makes it more strange is that the earth fault breaker for another part of the house tripped some 10 minutes befor the cnc was done milling. The cnc computer (laptop) was the only thing connected to that earth fault breaker, so it didng affect the milling. I don’t know why it tripped, and it was just to reset it. Perhaps it was a bad thing that the laptop via the cable was connected to one ground ”network” and the cnc to another.
If the tripping of the earth fault breaker busted the communication from the laptop to the cnc, perhaps i didn’t notice that because of that the last lines (10 minutes of milling) was already buffered to the uc300eth.

If anyone have any ideas of what to look into, i’ll super happy.

Best,
Victor

[ger21]

If you run the UCxxx_Utility, can it find it?

[Victor]

No, we’ve tried it on two computers, with crossed and straight cables, with auto ip and with those in the manual. Also after resetting the uc300 and we did wait some time aswell :-/.
/Victor

[Victor]

Another long shot:
I zoomed in on the processor and saw that the outer two pins seems to be soldered together. If they are sopposed to be bridged, that would be in the board I think. It is also some pins a bit up on the left side that looks as they are connected. The uc300 have worked fine for 5 month/100+ hours thou.
Do anyone know of board diagrams? I cannot find at cnc drive’s web page.

/Victor

Update: the bottom two are connected 0 ohm when measuring with multimeter. The other, on the left seemed to be just some debree.

[dezsoe]

All UC300ETH boards have those pins connected, it's normal. Your laptop worked while the machine was working. If the PC (or the program on the PC) stops then the motion controller goes to e-stop state and no more movements are executed.

[Victor]

Thank you!

Yes, both the laptop and the cnc was working last time, and it ran throghout the program. It is so strange it is mission impossible to get it working now. It was just an ordinary end (except for the ground breaker tripping on another area in the house). The laptop isnt connected to earth, so I am not too concerned it was some surge coming från the ground when the ground fault breaker tripped.

/Victor

[cncdrive]

Yes, those pins are connected together on purpose.

What are the LED states on the UC300ETH board?
IS the green LED on or blinking or?
And is the green LED in the RJ45 connector on when connected to the computer?
And when you runnung the utility tool does the yellow LED makes a few blinks?

I had a zero wire cut in my house a month ago which resulted in breaking my gas heater, my TV, my phone charger, my refrigator, my UPS power supply, causing over 2000 Euros in damage. So, electrical surges can be very very destructive.