| author | Mario de Sousa <msousa@fe.up.pt> |
| Mon, 04 Apr 2011 14:32:21 +0100 | |
| changeset 274 | 8d36d1f81170 |
| parent 0 | fb772792efd1 |
| child 277 | f88718b71b6c |
| permissions | -rwxr-xr-x |
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(* |
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* matiec - a compiler for the programming languages defined in IEC 61131-3 |
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* |
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* Copyright (C) 2011 Mario de Sousa (msousa@fe.up.pt) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* |
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* This code is made available on the understanding that it will not be |
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* used in safety-critical situations without a full and competent review. |
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*) |
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(* |
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* An IEC 61131-3 compiler. |
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* |
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* Based on the |
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* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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* |
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*) |
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fb772792efd1
Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
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fb772792efd1
Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
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Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
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(* |
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* This is part of the library conatining the functions |
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* and function blocks defined in the standard. |
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fb772792efd1
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* |
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fb772792efd1
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* SR and RS function blocks |
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* ------------------------- |
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fb772792efd1
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*) |
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fb772792efd1
Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
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parents:
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(* The standard defines the SR FB thus: |
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+-----+ |
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S1----------------| >=1 |---Q1 |
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+---+ | | |
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R------O| & |----| | |
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Q1------| | | | |
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+---+ +-----+ |
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*) |
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fb772792efd1
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FUNCTION_BLOCK SR |
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VAR_INPUT |
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S1, R : BOOL; |
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END_VAR |
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VAR_OUTPUT |
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Q1 : BOOL; |
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END_VAR |
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Q1 := S1 OR ((NOT R) AND Q1); |
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END_FUNCTION_BLOCK |
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(* The standard defines the RS FB thus: |
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+---+ |
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R1----------------O| & |---Q1 |
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+-----+ | | |
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S-------| >=1 |----| | |
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Q1------| | | | |
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+-----+ +---+ |
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*) |
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FUNCTION_BLOCK RS |
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VAR_INPUT |
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S, R1 : BOOL; |
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END_VAR |
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VAR_OUTPUT |
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Q1 : BOOL; |
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END_VAR |
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Q1 := (NOT R1) AND (S OR Q1); |
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END_FUNCTION_BLOCK |