This is the E_F_TRIG (falling edge detection) function block type defined in Annex A of IEC 61499-1. Its operation is defined by the diagram below.

Test Procedure
  1. Open and run events/E_F_TRIG in the FBDK.
  2. Exercise the FB by entering a value for the QI input variable and clicking on the EI event input.
Last updated: 2016-04-18.
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