×
Siemens Industry Online Support
Siemens AG
Entry type: FAQ Entry ID: 19644712, Entry date: 10/12/2004
(0)
Rate

Technology CPUs: Release from a hardware limit switch

  • Entry
  • Associated product(s)

QUESTION:  
How can you get an axis back into the working range after it has overrun a hardware limit switch?

ANSWER:  
When a hardware limit switch is overtraveled, ErrorID 804B or 8013 is displayed in the relevant technology data block and "ErrorStatus.LimitSwitchActive" is set to TRUE. Proceed as follows:

  • Call the MC_Reset with Restart = FALSE; all error messages are retained. 
  • Retract the axis from the hardware limit switch; all error messages are retained even when the axis has left the limit switch. 
  • Call the MC_Reset again with Restart = FALSE; the error messages are acknowledged in the technology data block and "ErrorStatus.LimitSwitchActive" is reset.

Note:
More information is available in the manual "S7 Technology", sections 4.5.7 and 4.6.11 "Limits" in Entry ID: 30119663.

Security information
In order to protect technical infrastructures, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art IT security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about cyber security, please visit
https://www.siemens.com/cybersecurity#Ouraspiration.