16955

Common Causes

• Stop command issued during active DELAYFSTON/DELAYFSTOF block without proper sequencing
• Conflicting stop delay parameters in $MN_STOP_MODE_MASK configuration
• Motion commands extending beyond intended stop delay area boundaries
• PLC or external stop signal timing overlapping with delay zone execution
• Improper NC program logic with nested or overlapping stop delay regions

Troubleshooting Steps

1. 1Verify DELAYFSTON and DELAYFSTOF block placement in NC program matches intended stop delay area; confirm blocks are properly paired without nesting conflicts
2. 2Review $MN_STOP_MODE_MASK parameter settings on the affected channel and cross-reference against machine documentation for correct bit configuration
3. 3Check program flow around stop command insertion point; ensure stop is not being triggered during active delay zone or immediately after DELAYFSTON
4. 4Inspect PLC interface logic and external stop signal timing; verify no competing stop commands are being issued within the delay area window
5. 5Simulate program execution in dry-run or single-block mode to observe actual stop timing versus expected stop point; adjust DELAYFSTOF placement if stop is occurring at unintended location