Mitsubishi M01 0001 alarm: Dog overrun during reference return

Mitsubishi reports the dog was overrun during the reference return. It is an alarm from the Sobrecarrera area, and in the catalog it is listed as “Dog overrun during reference return”. On the machine you notice it like this: Fails when homing, The axis does not capture the reference, It may appear after a sensor or reference parameter.

On the shop floor it almost always comes from one of these causes: Sensor dog mal ajustado, Incorrect reference speed, Final/cable defectuoso, Return parameter incorrectly configured. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Reset after correcting the dog/sensor and repeating a safe reference run. Resetting without fixing the cause first only hides the problem: Mitsubishi M01 0001 trips again and, in the meantime, you keep working with the machine in bad shape.

With the machine stopped and in a safe state, start with these checks: Anotar eje, Revisar sensor de referencia, Do not repeat homing if the axis approaches the physical limit. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Mitsubishi M01 0001 active, avoid this: Do not bypass safety devices, Do not manipulate energized electrical cabinet, Do not continue producing if the alarm reappears. Skipping any of these points is what turns a minor stop into an expensive breakdown.

If there is no reference or there was intervention in sensors/parameters. If you are not sure how far it goes, stop the machine and report it: a repeat alarm always works out cheaper than a crash.

It is a stop alarm: the cycle will not continue until you fix the cause. It does not always mean serious damage, but it leaves the machine where it is and you have to check it before running again. Guidance reference. Always confirm the full text in the exact machine/control manual.