AnnexF/hysteresis_st.txt
author Manuele Conti <conti.ma@alice.it>
Tue, 28 Aug 2012 22:37:26 +0200
changeset 642 2ca07e3b08d6
parent 0 fb772792efd1
permissions -rwxr-xr-x
Replace test bison version without bash regular expression.
Tested on OS X 10.8 - Linux Ubuntu 12.4 - MinGW.
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FUNCTION_BLOCK HYSTERESIS
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    (* Boolean hysteresis on difference *)
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    (* of REAL inputs, XIN1 - XIN2      *)
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  VAR_INPUT XIN1, XIN2, EPS : REAL; END_VAR
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  VAR_OUTPUT Q : BOOL := 0; END_VAR
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  IF Q THEN IF XIN1 < (XIN2 - EPS) THEN Q := 0; END_IF ;
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  ELSIF XIN1 > (XIN2 + EPS) THEN Q := 1 ;
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  END_IF ;
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END_FUNCTION_BLOCK
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