Siemens CU240B/E-2 Error F01656: SI P1: Parameter processor 2 parameter error

Control unit · taken from the manufacturer’s manual, pages cited

Fault codeF01656

When accessing the Safety Integrated parameters for the processor 2 in non-volatile memory, an error occurred. The manual's first action is: “- re-commission the safety functions.”

Model
Siemens CU240B/E-2
Display shows
SI P1: Parameter processor 2 parameter error (F01656)
Type
Fault code
Source
Manual p. 673

What F01656 means

SI P1: Parameter processor 2 parameter error p. 673

Common causes

  • When accessing the Safety Integrated parameters for the processor 2 in the non-volatile memory, an error has occurred. p. 673
  • Note: This fault results in a STOP A that can be acknowledged. p. 673
  • Fault value (r0949, decimal interpretation): p. 673
  • 129: Safety parameters for processor 2 corrupted. p. 673
  • 131: Internal software error p. 673
  • 132: Communication errors when uploading or downloading the safety parameters. p. 673
  • 255: Internal software error on the Control Unit. p. 673
  • Remedy: p. 673
  • - replace the memory card or Control Unit. p. 673
  • For fault value = 129: p. 673
  • - adapt the PROFiSafe address (p9610). p. 673
  • - start the copy function for SI parameters (p9700 = D0 hex). p. 673
  • - acknowledge data change (p9701 = DC hex). p. 673
  • - exit the safety commissioning mode (p9701 = 0). p. 673
  • - save all parameters (p0971 = 1 or "copy RAM to ROM"). p. 673
  • - carry out a POWER ON (power off/on) for the Control Unit. p. 673
  • For fault value = 132: p. 673

What to do

  1. - re-commission the safety functions. p. 673
  2. - activate the safety commissioning mode (p0010 = 95). p. 673
  3. - check the electrical cabinet design and cable routing for EMC compliance p. 673

If F01656 is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact Siemens service.

Open the manual at page 673 All CU240B/E-2 error codes Manual details & download

This page summarises what the manufacturer’s manual says about F01656; 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.