You are rights. Many people don't feel fine when have to ask experts about something simple. I'm start my long journey whit kuka 2 week ago. Knowledge about robots - looks extra that's all. Who allows such a person to take care of the robot? ME! The owner of a extra small business.
I bought scrap machines from the 70's 80's & 90's - repaired and upgraded them. Now I process 200 tons of steel a year. But I know one thing - it's better to ask a specialist about nonsense than to break something.
Back to the main topic on the forum there is a lot of information that the beckhoff driver is connected backwards. I preferred to ask. after the answer came, I checked this connection. it doesn't work and nothing is burnt out.
I will definitely be back with questions take more pictures and more correct english.
Regards !
Piotr