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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 101161 - The drive is not in cyclic mode!
Alarm 101161 indicates that the drive has not established cyclic communication with the NCU (Numerical Control Unit). This alarm typically occurs during startup or commissioning when the PROFIBUS/PROFINET communication cycle between the drive and control is not running, preventing motor data calculation or other drive-dependent functions from executing.
101161
Siemens 840D 101161 - The drive is not in cyclic mode!
The drive is not in cyclic mode!
Siemens SINUMERIK operator message 101161: The drive is not in cyclic mode!. This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.
Root Cause Summary
Alarm 101161 indicates that the drive has not established cyclic communication with the NCU (Numerical Control Unit). This alarm typically occurs during startup or commissioning when the PROFIBUS/PROFINET communication cycle between the drive and control is not running, preventing motor data calculation or other drive-dependent functions from executing.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Verify all drive modules show green RDY (Ready) LEDs and check for red fault indicators on drive units and communication modules.
- 2
In HMI Commissioning mode, navigate to 'Commissioning' > 'Drive' > 'Topology' and verify all configured drives show 'Cyclic' status with green indicators.
- 3
Check PROFIBUS/PROFINET bus diagnostics for communication errors, cable faults, or missing telegram acknowledgments between NCU and drive line modules.
- 4
Perform a complete power cycle: switch off cabinet main power, wait 30 seconds, power on and allow full NCU and drive boot sequence (2-3 minutes) before attempting motor data calculation.
Ensure machine is in safe state and all axes are secured before power cycling.
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Always verify with your machine manual or a certified technician before performing service procedures.