Siemens CPU 31xC / CPU 31x Error SF: Hardware fault or software error

Siemens CPU 31xC / CPU 31x · taken from the manufacturer’s manual, pages cited

Error codeSF

Hardware fault or software error has occurred. The manual lists no action for this code.

Model
Siemens CPU 31xC / CPU 31x
Display shows
Hardware fault or software error (SF)
Type
Error code
Source
Manual p. 54

What SF means

Hardware fault or software error p. 54

Common causes

  • Hardware fault or software error p. 54

If SF is still not resolved

  • contact service / dealer p. 2
    “Legal information Legal information Warning notice system This manual contains notices y ou have to observe in order to en sure your personal safety, as well as to prevent damage to property.”
  • contact service / dealer p. 157
    “The CPUs will change to STOP m ode if you exceed the permissible size of local data for a priority class.”
Open the manual at page 54 All CPU 31xC / CPU 31x error codes Manual details & download

This page summarises what the manufacturer’s manual says about SF; 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.