Nc retain data error (persistent data)

What does 4002 mean?

An error occurred while loading the NC retain data, which stores persistent configuration and state information. This results in affected axes losing their reference (status flag 'Homed' set to FALSE) and can be caused by missing, expired, corrupt, or inconsistent retain data. Loss of this data means the machine will need to be re-homed and potentially re-configured.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Re-reference (re-home) all affected axes after attempting data restoration or system restart.

2. 4

   Investigate potential causes for data corruption, such as sudden power loss or disk issues.