61701

Common Causes

• Missing or undefined _NP1, _NP2, or _NP3 parameters in CYCLE950 call
• Incorrect finished-part contour programming syntax or invalid geometry definition
• Contour parameters contain null, zero, or out-of-range values
• Incomplete or malformed contour subroutine referenced by the cycle
• Parameter assignment order incorrect or parameters not initialized before cycle invocation

Troubleshooting Steps

1. 1Verify that all three parameters _NP1, _NP2, and _NP3 are explicitly declared and assigned valid numerical values before CYCLE950 execution
2. 2Review the finished-part contour subroutine definition for syntax errors, missing coordinates, or incompatible geometry statements
3. 3Check that the contour programming follows Siemens 840D/828D specifications and that all required contour elements (start point, end point, intermediate points) are properly defined
4. 4Confirm parameter values are within acceptable ranges for the contour type being used and that no parameters reference undefined variables
5. 5Enable program trace or use the diagnostics function to inspect actual parameter values at alarm trigger point; compare against cycle documentation