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MonitoringTime input

Specification of the maximum permissible response time of the connected contactors.

Data type: TIME
Initial value: #0ms

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

Once the S_EDM_Out output switches to SAFETRUE, the feedback signal at the EDM1 and EDM2 inputs must become FALSE within the response time specified here. Otherwise, the function block outputs an error message (output Error = TRUE) and the S_EDM_Out output switches to the defined safe state (SAFEFALSE).

The process of switching off the connected contactors is also time-monitored: if the S_EDM_Out output switches from SAFETRUE to SAFEFALSE, the switching operation of the contactors is also monitored. The feedback signal at the EDM1 and EDM2 inputs must become TRUE within the permissible response time set at MonitoringTime.

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