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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 10202 - [up to SW 3.x] Channel NC start not possible
Alarm 10202 occurs when the NC program cannot be started in the specified channel due to active inhibiting conditions. This is typically caused by program selection errors, active alarms blocking execution, or the control being in an operational state that prevents NC start (such as an active program already running or critical safety/mode conditions).
10202
Siemens 10202 - [up to SW 3.x] Channel NC start not possible
[up to SW 3.x] Channel NC start not possible
NC start is not accepted because, e.g. - REORG is still active - Delete distance-to-go is still active - The system is waiting for another channel Control reaction: Alarm display.
Root Cause Summary
Alarm 10202 occurs when the NC program cannot be started in the specified channel due to active inhibiting conditions. This is typically caused by program selection errors, active alarms blocking execution, or the control being in an operational state that prevents NC start (such as an active program already running or critical safety/mode conditions).
Safety
- Only qualified personnel should diagnose and clear control alarms; follow the machine builder's safety procedures and lockout/tagout where hardware work is required.
Causes and Fixes
- 1
Check the HMI program manager to verify a valid NC program is selected in the affected channel.
- 2
Verify the selected program can be opened and displayed without errors. Check for file corruption or incomplete program transfer.
- 3
Review any preceding alarms or error messages that may indicate program syntax errors or loading failures.
- 4
Attempt to reload the program from a backup or re-transfer from CAM system if file integrity is suspect.
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