Cause: Defect in a monitoring channel comes when the drive-integrated "Safety Integrated" function on processor 1 has detected a fault in the crosswise data comparison between the two monitoring channels and has initiated a STOP F.

f1611 siemens indicates an issue with a monitoring channel within the drive's safety integrated (SI) functions. This alarm signifies that the safety function has detected an internal error and has initiated a Safe Torque Off (STO).

Follow these steps to correct f1611 siemens:

• Check the cross data comparison that resulted in a STOP F.
• Carry out a POWER ON (power off/on).
• Ensure that the drive's firmware is up to date. A software upgrade might resolve known issues within the Safety Integrated functions.
• If you have a valid parameter backup (e.g., on a memory card), try loading it and then performing a power cycle.
• If the problem persists after trying the above steps, it might indicate a hardware defect in the Control Unit.