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Siemens SINUMERIK Controller
Servo/Axis · Basic · 10-20 minutes
Siemens 840D 61501 - Channel block: Simulation is active
The alarm can be triggered by the following grinding cycles: all grinding cycles Remedy: Reset simulation
61501
Siemens 840D 61501 - Channel block: Simulation is active
Channel block: Simulation is active
The alarm can be triggered by the following grinding cycles: all grinding cycles Remedy: Reset simulation
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Common Causes
- Simulation mode is enabled in the control system preventing actual machine execution
- User activated simulation/dry-run mode without disabling it before production cycle
- Control software in test or commissioning state with simulation flag active
- Grinding cycle parameters set to simulation mode rather than execution mode
Troubleshooting Steps
- 1Verify simulation mode status in the HMI interface and disable simulation if active
- 2Reset the control system and clear any active simulation flags in the channel configuration
- 3Check machine parameters and grinding cycle setup to confirm execution mode is selected rather than simulation
- 4Review the NC program and ensure no simulation commands are embedded in the grinding cycle code
- 5Power cycle the machine control and reinitialize the channel to restore normal operation mode
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Always verify with your machine manual or a certified technician before performing service procedures.