10256

Check the alarm log timestamp and correlate with operator actions - verify if RESET or STOP was pressed during program execution.

Review the part program for REORG or repositioning commands and identify where the interruption occurred.

Clear the alarm using the CLEAR key and verify channel status shows RESET condition.

Restart the program from a safe position or beginning of block. Train operators to avoid interrupting repositioning sequences.

Ensure machine is in a safe position before restarting to avoid collisions.

Check for preceding alarms in the alarm buffer, specifically 25xxx (axis/drive) or 27xxx (following error) alarms that occurred before 10256.

Access diagnostics -> servo traces and examine axis velocity/position tracking during the timeframe of the alarm.

Resolve any identified drive faults, check encoder cables, verify power supply to drives, and test axis movement in JOG mode.

Use caution when jogging axes - ensure clear workspace and reduced feedrate override.

After resolving drive issues, clear all alarms, reference axes if required, and restart the program.

Review the NC part program around the alarm occurrence for unusual block structures, rapid REORG calls, or excessive lookahead buffer demands.

Access Settings -> Channel data and verify lookahead buffer settings (MD18100) and reorganization parameters are within recommended ranges per Siemens documentation.

Simplify program logic by reducing subroutine nesting depth, adding dwell times before REORG, or splitting complex motion blocks.

Test modified program in single block mode to verify reorganization completes without interruption. Consider upgrading to SW 4.x or higher if persistent.

This alarm is obsolete in SW versions 4.x and higher - upgrade may permanently resolve issue.