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AnnexF/ramp_st.txt
author Manuele Conti <conti.ma@alice.it>
Mon, 30 Jul 2012 22:59:00 +0200
changeset 622 eaa49b276e17
parent 0 fb772792efd1
permissions -rwxr-xr-x
Add check bison version in configure.ac file.
To build correctly matiec we need bison greater or equals than 2.4 version.
Now the "configure" script is able to check if system has correctly requirements.
0
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 FUNCTION_BLOCK RAMP
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   VAR_INPUT
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     RUN : BOOL ;      (* 0 - track X0, 1 - ramp to/track X1 *)
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     X0,X1 : REAL ;
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     TR : TIME ;       (* Ramp duration *)
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     CYCLE : TIME ;    (* Sampling period *)
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   END_VAR
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   VAR_OUTPUT
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     BUSY : BOOL ; (* BUSY = 1 during ramping period *)
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     XOUT : REAL := 0.0 ;
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   END_VAR
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   VAR XI : REAL ;       (* Initial value *)
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       T : TIME := T#0s; (* Elapsed time of ramp *)
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   END_VAR
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   BUSY := RUN ;
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   IF RUN THEN
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      IF T >= TR THEN BUSY := 0 ; XOUT := X1 ;
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      ELSE XOUT := XI + (X1-XI) * TIME_TO_REAL(T)
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                                / TIME_TO_REAL(TR) ;
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           T := T + CYCLE ;
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      END_IF ;
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   ELSE XOUT := X0 ; XI := X0 ; T := t#0s ;
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   END_IF ;
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 END_FUNCTION_BLOCK
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