Okuma Alarm A-1717 – Unable to Use M40, M43, M44 Commands

Okuma Alarm A-1717 indicates that the commands M40, M43, and M44 cannot be executed due to the current motor configuration. These commands are typically associated with VAC winding changeover motor specifications and may be restricted depending on the setup.

Meaning of the Alarm

This alarm occurs when the control system detects that M40, M43, or M44 commands are not allowed under the current motor configuration. The machine blocks execution to prevent incorrect operation.

Possible Causes

  • Incorrect assignment of M40, M43, or M44 commands

  • VAC winding changeover motor configuration mismatch

  • Incompatible motor specification

  • Incorrect parameter settings

  • Programming or configuration error

Recommended Checks

  • Verify motor type and compatibility with M40, M43, M44

  • Check control system parameters related to motor configuration

  • Review CNC program command usage

  • Compare configuration with a working machine

  • Reload or correct machine parameters if needed

When Professional Service Is Required

If the alarm persists after correcting configuration settings, the issue may be related to control system faults or hardware problems. In such cases, professional diagnostics are recommended.

Related Solutions

  • CNC diagnostics and troubleshooting

  • Motor configuration adjustment

  • Control system parameter correction

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