Mitsubishi Meldas 64 Parameter Manual Jun 2026

Connect your PC to the CNC RS-232 port using a null-modem cable.

Remember that while Mitsubishi makes the Meldas 64 controller, the Machine Tool Builder (e.g., Mazak, Mori Seiki, Citizen) writes the PLC logic. Always check your specific machine builder's manual alongside the Mitsubishi manual for proprietary #6000 macro parameters.

: Specifically for the MELDAS 60/60S series, providing descriptions for error codes and related parameters Specifications Manual (BNP-B2266) mitsubishi meldas 64 parameter manual

For those working with Mitsubishi’s MELDAS 64 series CNC controls—whether on a milling machine, lathe, or machining center—having the correct is critical for setup, troubleshooting, and performance tuning.

Set the transfer device to (usually device number 0 or 1). Connect your PC to the CNC RS-232 port

| | Likely Cause | Parameter-Related Fix | | :--- | :--- | :--- | | Z70: ILLEGAL ABS | The absolute positioning data for an axis is lost or invalid. Often occurs after a battery failure or a loose servo encoder connector. | Check parameters related to absolute encoder use (e.g., #2049 for the Meldas 60 series). Setting this parameter correctly tells the control which axes have absolute encoders. | | S01, S03, S04 Alarms | These are general system alarms. S01 often indicates a system error, S03 a servo alarm, and S04 a drive alarm. | While often reset by power cycling ( S01 , S04 ) or pressing RESET ( S03 ), recurring issues usually point to a parameter problem. The alarm/parameter guide will list specific alarm codes and their meanings. | | RS-232 Communication Failure | The CNC cannot connect to a PC for data transfer. | Go to TOOL PARAM → I/O PAR and verify the baud rate, parity, and other settings match your PC's configuration. Ensure the correct port is selected. | | Unexpected Axis Movement (e.g., G28 issues) | The machine performs a reference return (G28) differently than expected. | Misconfiguration of parameters controlling reference return (like G28 behavior) can cause unexpected movement. Check your machine builder's manual for which parameters control this function. | | Screen Language in Chinese | After a system reset, the default language setting may be Chinese. | Navigate blindly to parameter #1043 and set its value to 1 to switch the language to English. |

If your machine freezes during a program upload, checking the #1100 device parameters in the manual will tell you if the controller is waiting for a software (XON/XOFF) or hardware RTS/CTS signal. Summary of Best Practices : Specifically for the MELDAS 60/60S series, providing

Back up your parameters before any major maintenance, servo tuning, or software updates.

Position loop gains, speed loop gains, and resonance filters. Eliminates surface finish chatter and servo alarms. #9000 series RS-232C baud rate, stop bits, and data transfer protocols. Required for DNC operation and sending G-code programs. 3. Step-by-Step Parameter Backup and Restoration Procedure

For a complete understanding of your Meldas 64 system, consult this family of manuals beyond the Parameter Manual: