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

Okuma Alarm A-1717 indicates that the M40, M43, and M44 commands cannot be executed due to the current motor configuration. These commands are typically assigned to 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 the use of M40, M43, or M44 commands is not permitted under the current motor configuration. The machine blocks execution to prevent incorrect operation.

Possible Causes

  • M40, M43, or M44 commands assigned incorrectly

  • VAC winding changeover motor configuration mismatch

  • Incompatible motor specification

  • Incorrect parameter settings in the control system

  • Programming or configuration error

Recommended Checks

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

  • Check control parameters related to motor configuration

  • Review CNC program command usage

  • Compare settings with a working machine configuration

  • 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 deeper control system or hardware faults. In such cases, professional diagnostics are recommended.

Related Solutions

  • CNC diagnostics and troubleshooting

  • Motor configuration adjustment

  • Control system parameter correction

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