Siemens F30001 alarm: SINAMICS: overcurrent

The SINAMICS drive detects output current higher than the threshold (typically 200% nominal). It is an alarm from the Servo / ejes area, and in the catalog it is listed as “SINAMICS: overcurrent”. On the machine you notice it like this: Immediate drive trip, Eje/husillo deshabilitado, Alarm 300500 in companion NCK.

On the shop floor it almost always comes from one of these causes: Short circuit in the motor or cable, Fallo a tierra, Motor parameters (p0304/p0305) incorrect, Long cable without a filter, Too aggressive acceleration ramp. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Reset only after verified repair. Resetting without fixing the cause first only hides the problem: Siemens F30001 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: Note F30001 and r0949 (sub-value), Do not re-energise repeatedly, Megger-test the motor/cable with the drive powered off. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Siemens F30001 active, avoid this: Do not retry the start-up repeatedly, Do not work on an energised drive, Do not raise current limits. Skipping any of these points is what turns a minor stop into an expensive breakdown.

Always: indicates electrical/engine problem. 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 critical: there is a real risk of damage to the machine, the tool or a person. Leave the machine stopped, do not keep resetting it to see if it goes away, and call maintenance before producing again. Guidance reference. Always confirm the full text in the exact machine/control manual.