AnnexF/hysteresis_st.txt
author mjsousa
Thu, 30 Apr 2015 20:54:04 +0100
changeset 1000 556b74055518
parent 0 fb772792efd1
permissions -rwxr-xr-x
Add check for repeated elements in a CASE statement. Emit warnings (and not errors) if found.
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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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