Okuma Alarm P-0727 – MCS Firmware Does Not Support POS2 Unit

Okuma Alarm P-0727 indicates that the current MCS firmware version does not support the installed POS2 unit. This typically occurs when the firmware is outdated and incompatible with newer hardware.

Meaning of the Alarm

This alarm occurs when the control system detects that the firmware ROM version of the NC axis or PLC (MIV unit) is lower than the required version for the POS2 unit. As a result, the system cannot properly operate the installed component.

Possible Causes

  • Firmware version below required level (below version 511)

  • POS2 unit installed on unsupported firmware

  • Outdated NC axis or PLC firmware

  • System compatibility mismatch

  • Incorrect system configuration

Recommended Checks

  • Verify firmware version of NC axis and PLC (MIV unit)

  • Ensure firmware is version 511 or later

  • Check compatibility of POS2 unit with current system

  • Review system configuration and installation setup

  • Update firmware to the required version if necessary

When Professional Service Is Required

If the alarm persists after verifying firmware compatibility, the issue may require firmware updating or advanced system configuration. In such cases, professional diagnostics are recommended.

Related Solutions

  • CNC diagnostics and troubleshooting

  • Firmware update and system upgrade

  • Control system compatibility check

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