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AnnexF/lag1_st.txt
author Edouard Tisserant
Fri, 19 Oct 2012 12:10:32 +0200
changeset 634 736b36a83548
parent 0 fb772792efd1
permissions -rwxr-xr-x
Added double curly braces for pragma (kept single curly braces for compatibility). Added macro def and undef surrounding pragma to simplify user code. Moved useless comment from generated code back to code generator.
0
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
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 FUNCTION_BLOCK LAG1
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   VAR_INPUT
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     RUN : BOOL ;     (* 1 = run, 0 = reset *)
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     XIN : REAL ;     (* Input variable *)
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     TAU : TIME ;     (* Filter time constant *)
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     CYCLE : TIME ;   (* Sampling time interval *)
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   END_VAR
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   VAR_OUTPUT XOUT : REAL ; END_VAR  (* Filtered output *)
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   VAR K : REAL ;     (* Smoothing constant, 0.0<=K<1.0 *)
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   END_VAR
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   IF RUN THEN XOUT := XOUT + K * (XIN - XOUT) ;
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   ELSE XOUT := XIN ;
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        K := TIME_TO_REAL(CYCLE) / TIME_TO_REAL(CYCLE + TAU) ;
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   END_IF ;
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 END_FUNCTION_BLOCK
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