Siemens CU240S Error F01649: Internal software error

Siemens CU240S · taken from the manufacturer’s manual, pages cited

Fault codeF01649

Internal software error occurs when there is a buffer overflow during checksum calculation for safety parameters or an endless safety loop. The manual lists no action for this code.

Model
Siemens CU240S
Display shows
Internal software error (F01649)
Type
Fault code
Source
Manual p. 403

What F01649 means

Internal software error p. 403

Common causes

  • r0949 = 1: Buffer overflow on checksum calculation for P1 parameter access functions. p. 403
  • r0949 = 2: Buffer overflow on checksum calculation for P2 parameter access functions. p. 403
  • r0949 = 3: Endless safety loop on P1. p. 403
  • r0949 = 4: Endless safety loop on P2. p. 403
  • r0949 > 100: Signal an internal or unexpected software fault. p. 403

If F01649 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 403 All CU240S error codes Manual details & download

This page summarises what the manufacturer’s manual says about F01649; 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.