Heidenhain 120-001E alarm: Cannot connect to the network drive

The TNC cannot connect to a configured path, server or network drive. It is an alarm from the PLC/machine area, and in the catalog it is listed as “Cannot connect to the network drive”. On the machine you notice it like this: It does not open network programs, network/share message, May occur after an IP or server change.

On the shop floor it almost always comes from one of these causes: Servidor apagado, Wrong path or credentials, Cable/switch, IP/gateway/DNS. Rule out the most likely one on your machine first, before touching parameters or swapping anything.

Retry after restoring connection. Resetting without fixing the cause first only hides the problem: Heidenhain 120-001E 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: Test the network from another PC, Check the IP and the credentials, Probar cable/puerto de switch. That alone will tell you whether it is the program or whether you need to raise a maintenance job.

With Heidenhain 120-001E 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 the control's network does not respond or needs IT/OEM. 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 warning: the machine carries on, but it is flagging something that will get worse if you let it go. Deal with it between parts, not at the end of the shift. Guidance reference. Always confirm the full text in the exact machine/control manual.