alarm 0020 [50]

Which controller? Which message you have on screen?

no communication with the first servo system. Without knowing the controller type can't say any more.

Hello, I have the same problem. I am using an NX100 controller and have followed these steps. I keep getting it 0020 [50].

Any idea? Thank you!!

In an NX100 the problem can be in the 24 volt circuit. Look at the power supply to see if there are any red lights. Also, If you are using an external power supply, make sure it is working. The communication error is to the AXA card. The encoders connect to the front of the card, the system connects to the bottom of the card. If someone has moved a plug to the wrong port you can get this, or the AXA card is bad. If you have another robot you can swap the cards. Be very careful of where you take cables out and put cable in.

We literally had this fault come up yesterday after an AXA card swap. Black system cable connection underneath wasn’t fully seated after new card install. Pushed it in so you could hear/feel the connection ‘click’ and fault cleared after power cycle

Quote from Ro Bo Rye

We literally had this fault come up yesterday after an AXA card swap. Black system cable connection underneath wasn’t fully seated after new card install. Pushed it in so you could hear/feel the connection ‘click’ and fault cleared after power cycle

Thank you Ro Bo Rye and Robodoc!! But before I decide to replace any of the hardware cards, do you know if I can modify anything in the settings to check if it reconnects?