14766

Common Causes

• Excessive link variable assignments in NC program causing buffer overflow
• Machine data write operations accumulating faster than NCU can process
• Large container switch values or setting data writes competing for limited link bandwidth
• Insufficient NCU link buffer size for current program complexity
• Rapid successive non-cyclic data transfers without adequate timing between operations

Troubleshooting Steps

1. 1Review NC program for unnecessary or redundant link variable assignments and consolidate where possible
2. 2Reduce frequency of machine data write operations by batching updates or implementing timing delays between write cycles
3. 3Analyze container switch values and setting data operations; defer non-critical updates to initialization routines rather than part program execution
4. 4Check NCU buffer configuration in machine data and increase link buffer allocation if parameter allows
5. 5Implement program flow logic to serialize non-cyclic data transfers and avoid simultaneous competing write operations