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MaxOverrideTime input

Specification of the maximum permissible time (in seconds) for the entire override operation. If the override operation is not completed within this time, the S_AOPD_Out output is switched to the defined safe state SAFEFALSE and the function block signals an error (Error is set to TRUE).

Data type: TIME
Initial value: #60s

Connection: Connect this input to a time literal, i.e., to a constant of the data type TIME.

This timer starts when the override operation is initiated by the operator (S_StartStopOverride input switches to SAFETRUE).

If the override operation is interrupted (S_StartStopOverride switches to SAFEFALSE), the override timer continues to run. If the override operation is not restarted within the set time (S_StartStopOverride switches to SAFETRUE), the function block signals an error (Error = TRUE).

WARNUNG
Non-conformance to safety function requirements
  • Verify that the time value set at MaxOverrideTime corresponds to your risk analysis.
  • Be sure that your risk analysis includes an evaluation for incorrectly setting the time value applied to the MaxOverrideTime input.
  • Validate the overall safety-related function with regard to the set MaxOverrideTime value and thoroughly test the application.

Minimum value: 0 s
Maximum value: 600 s