Timers, counters, and keep-relays that connect the Fanuc system to the machine builder's ladder logic. ⚠️ Critical Procedures Found in the Manual 1. Parameter Backup and Restoration
| Param | Use | |-------|---------------------------------------------| | 400 | Max spindle speed (rpm) | | 401 | Gear selection: ratio code or direct drive | | 405 | Spindle orientation position (for tool change) |
These are sensitive parameters that affect accuracy and stability.