Siemens G120C Error F01651: SI P1 (CU): Synchronization safety time slices unsuccessful

Siemens G120C drive · taken from the manufacturer’s manual, pages cited

Fault codeF01651

Synchronization of safety time slices between processor 1 and 2 failed on the Siemens G120C, indicating an internal hardware/software error. The manual's first action is: “OFF2”

Model
Siemens G120C
Display shows
SI P1 (CU): Synchronization safety time slices unsuccessful (F01651)
Type
Fault code
Source
Manual p. 682

What F01651 means

SI P1 (CU): Synchronization safety time slices unsuccessful p. 682

Common causes

  • Hardwre/software error (1) p. 682
  • The "Safety Integrated" function requires synchronization of the safety time slices between processor 1 and processor 2. This synchronization routine was unsuccessful. p. 682
  • Fault value (f0949, interpret decimal): p. 682

What to do

  1. OFF2 p. 682
  2. Note: This fault results in a STOP A that cannot be acknowledged. p. 682
  3. Only for internal Siemens troubleshooting. Carry out a POWER ON (switch-off/switch-on). p. 682

Before you service the product, read the safety instructions in the manual p. 4.

If F01651 is still not resolved

  • contact service / dealer p. 4
    “Warning concept This Manual contains information which you must observe to ensure your own personal safety as well as to avoid material damage.”
  • contact service / dealer p. 12
    “WARNING Danger to life if the safety instructions and residual risks are not observed”
Open the manual at page 682 All G120C error codes Manual details & download

This page summarises what the manufacturer’s manual says about F01651; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Siemens. Found a mistake? Report an error.