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AnnexF/hysteresis_st.txt
author lbessard
Mon, 27 Aug 2007 14:52:15 +0200
changeset 52 f44458d1fa29
parent 0 fb772792efd1
permissions -rwxr-xr-x
Adding SET (S) and RESET(R) to action qualifier
generate_cc_sfc rewritten for better code clarity 
FUNCTION_BLOCK HYSTERESIS
    (* Boolean hysteresis on difference *)
    (* of REAL inputs, XIN1 - XIN2      *)
  VAR_INPUT XIN1, XIN2, EPS : REAL; END_VAR
  VAR_OUTPUT Q : BOOL := 0; END_VAR
  IF Q THEN IF XIN1 < (XIN2 - EPS) THEN Q := 0; END_IF ;
  ELSIF XIN1 > (XIN2 + EPS) THEN Q := 1 ;
  END_IF ;
END_FUNCTION_BLOCK
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