AnnexF/hysteresis_st.txt
author mjsousa
Tue, 29 Jul 2014 13:39:40 +0100
changeset 918 e9bde0aa93ed
parent 0 fb772792efd1
permissions -rwxr-xr-x
for option '-Op' (generate <pouname>.h/c): add '#include <pouname>.h' to the .c file, and '#ifdef <pouname>_H' to the .h file
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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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