61321

Common Causes

• WO (Working Offset) number referenced in _KNUM parameter does not exist in machine memory
• Incorrect _KNUM value entered in part program or cycle call
• WO memory table corrupted or WO data lost due to power failure or backup battery failure
• WO memory not properly initialized after machine startup or parameter reset
• Mismatch between WO number range defined in machine parameters and WO number called in program

Troubleshooting Steps

1. 1Verify the _KNUM parameter value in the active block and confirm the WO number exists in Diagnostics > Memory > WO memory table
2. 2Check machine parameters (P-series) for WO memory range configuration and ensure called WO number falls within defined range
3. 3Access machine backup/restore function to verify WO memory integrity; restore from last known good backup if corruption is suspected
4. 4Power cycle the machine and perform a cold start to reinitialize WO memory, then retry the program
5. 5Edit the part program to correct the _KNUM value to reference an existing WO number, or create the missing WO entry if intentional