Okuma Alarm P-0802 – Load Information File Not Found
What Does Alarm P0802 Mean?
The Okuma alarm P0802 indicates that the control cannot locate the required load information file corresponding to the specified configuration codes.
This typically occurs when the custom software production system attempts to access a load information file that either does not exist or does not match the current system specification.
As a result, the CNC control cannot properly initialize the required machine configuration.
Technical Explanation
Okuma CNC controls use load information files to define machine configuration parameters based on specification codes. These files are essential for:
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Axis configuration
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Drive setup
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Machine option control
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Software module initialization
If the control attempts to load a file that is:
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Missing
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Corrupted
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Incorrectly referenced
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Incompatible with the current system version
Alarm P0802 is triggered to prevent inconsistent system behavior.
In some cases, this alarm appears after system updates or partial data restoration when specification codes do not match the installed machine configuration.
Typical Situations Where This Alarm Appears
Alarm P0802 may occur:
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After replacing the HDD or CF card
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After restoring system data from backup
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Following software updates
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When machine option parameters were modified
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After incorrect file transfer
Possible Causes
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Missing load information file
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Incorrect specification code reference
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Corrupted system data
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Version mismatch between software and configuration
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Incomplete system restoration
Recommended Troubleshooting Steps
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Verify that the load information file exists in the correct system directory.
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Confirm that specification codes match the machine configuration.
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Restore system data from a verified backup if necessary.
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Check storage media integrity.
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Ensure software version compatibility.
Important: Do not modify specification codes without proper documentation. Incorrect configuration may lead to unstable system behavior.
Is This a Hardware Issue?
Not necessarily. In most cases, Alarm P0802 is related to system configuration or data mismatch.
However, repeated file corruption may indicate storage device failure or control memory instability.
When Professional Service Is Recommended
If the alarm persists after verifying configuration and restoring backups, professional diagnostics may be required.
Our CNC electronics specialists provide:
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Okuma control diagnostics
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System data verification
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Storage media replacement
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Configuration recovery
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Control board repair
