Siemens 300500 alarm: SINAMICS: encoder/drive fault reported to the NCK

The NCK receives an alarm from the SINAMICS drive, disables the axis and requests to review the specific F-code. It is an alarm from the Servo / ejes area, and in the catalog it is listed as “SINAMICS: encoder/drive fault reported to the NCK”. On the machine you notice it like this: Eje deshabilitado de inmediato, May trigger an e-stop, Accompanied by SINAMICS F-code.

On the shop floor it almost always comes from one of these causes: Cualquier F-code SINAMICS pendiente (F30001, F30005, F30015, F31100, etc.), DRIVE-CLiQ communication, Power module hardware, Encoder or motor. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Reset after resolving the originating F code. Resetting without fixing the cause first only hides the problem: Siemens 300500 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: Read r0945 and r0946 for the actual F code, Note F-code for diagnosis, Comprobar LEDs power module. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Siemens 300500 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.

Always if it persists after checking cables and configuration. 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.