Code 518: DATA OPERATION NOT ALLOWED
Issue Description & Safety Warning
The Mazak Mazatrol Matrix CNC has triggered a critical DATA OPERATION NOT ALLOWED alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Type of error: A — Operation (a wrong key was pressed or the machine was operated incorrectly) Stopped status: L — Operation continued Clearing procedure: S — Press clear key Display colour: Blue Cause: 1. An attempt has been made during automatic operation to load data other than machining program data. 2. An attempt has been made to save the data being loaded using another I/O unit. 3. An attempt has been made to load the data being saved using another I/O unit. Action: Wait until automatic operation has been completed (or until the loading or saving operation using another I/O unit has been completed).
Source: Mazak Mazatrol Matrix — Parameter List, M-Codes, Alarm Manual (Section 3 Alarm)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Mazak Mazatrol Matrix CNC Alarms
Mazak controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 518 on the Mazatrol Matrix CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Mazak's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 714 Mazak Mazatrol Matrix CNC codes.
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