401 servo alarm (VRDY OFF), at turn on, Fanuc OM SOLVED
Eveything was OK with machine, until we have moved it from place to place, just for one meter, by hand, carefully, and cleaned (washer) it, also carefully.
Now when I turn it on (main pow, nc control) and i pull out emergency stop, this alarm appears
401 SERVO ALARM: (VRDY OFF)
And I can't get rid of it, I push reset, it appears again, pull in/out EM STOP, alarm appears again.
Machine is not movable (nor in handle mode).
I have tryed to turn it off and on for several times, but no progress.
And on servo amplifiers there is no alarm code, just " - " as not ready.
I have red lot about this alarm, but it could be anything (wires, relays, amplifier, servo brushes, dirty servo.....?)
And read again my first sentance, it may be important for finding solution.
Re: 401 servo alarm (VRDY OFF), at turn on, Fanuc OM SOLVED
Hello
I read carefully this topic.
Don't find any solution for my "401 VRDY OFF "
I have a 0m-C controller and this error appear after 5-10 min from power-on even if the axis is not move.
All the voltage 110V and 220V are OK...The ESTOP circuit are ok...I work with machine only for reference, 5min in program and...401...Can you give some ideas for repair.
Thanks!
Re: 401 servo alarm (VRDY OFF), at turn on, Fanuc OM SOLVED
Dear DannyB.
Maybe your amplifier was mailfuntion, you have to change it for double check.
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Re: 401 servo alarm (VRDY OFF), at turn on, Fanuc OM SOLVED
Would like to add another solution with error code 401 (fanuc 0M).
Before this error make us to feel sick every day for more than year!!!
On the drive are five relays. Three of them are powered on in parallel.
110V Coil of one of them was burn out. We replaced relay with new one (we used different size relay, original is very rare)
And now our Fanuc works as new!!!
Thanks to everyone (and of course google :-))) who wrote their solution!!!