hello,
We have a problem with a Motor Drive Control.
The CNC is a TRAUB TNS 30/42 - but i think this is a general Motor Drive electronics problem ,

The Machine has a AMK Arnold Muller motor drive unit - D - 7321 MIFA control system.
We are getting a LED Indicater Status , which i believe is indicating that although the "Control" is Enabled the "Inverter is OFF".

basically when the button on the machine operaters control panel is pressed the drives/hydraulics are switched on, but they are operational for only 8 seconds and then switch off.- this is repeated every time i press the drives off/on.
there are no NC alarms just A016 when the drives go off, but that alarm is cleared by pressing drives off button.
Tthe main drive unit in the machine cabinet then shows a LED indicator status : error on power side or UE OFF at RF ON ,
can anyone advise with this problem please.
kind regards
Mr Des Williams