Qt for plc
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Hi and welcome to devnet,
How are you communicating currently with your PLC ?
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wrote on 27 Apr 2017, 16:28 last edited by
S7 offers a C API (https://cache.industry.siemens.com/dl/files/203/13649203/att_38732/v1/mn_s7api_e.pdf) you can use that to communicate with the PLC
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wrote on 28 Apr 2017, 08:48 last edited by
Hi,
I am exactly doing what you wanto to do. Qt doesn't have any possibility for the communication to PLC, by nature. However I communicate with PLC using SNAP7 library. This library is only for Siemens S7 PLCs, and it is really great and you can find pre-compilerd binaries as well, if you don't want to compile yourself. I downloaded and compiled source code and am using this library for reading and writing variables in PLC. You can easily integrate it in your Qt application.
SNAP7 source: http://snap7.sourceforge.net/ -
Hi,
I am exactly doing what you wanto to do. Qt doesn't have any possibility for the communication to PLC, by nature. However I communicate with PLC using SNAP7 library. This library is only for Siemens S7 PLCs, and it is really great and you can find pre-compilerd binaries as well, if you don't want to compile yourself. I downloaded and compiled source code and am using this library for reading and writing variables in PLC. You can easily integrate it in your Qt application.
SNAP7 source: http://snap7.sourceforge.net/wrote on 12 Oct 2018, 02:26 last edited byThis post is deleted! -
Hi,
I am exactly doing what you wanto to do. Qt doesn't have any possibility for the communication to PLC, by nature. However I communicate with PLC using SNAP7 library. This library is only for Siemens S7 PLCs, and it is really great and you can find pre-compilerd binaries as well, if you don't want to compile yourself. I downloaded and compiled source code and am using this library for reading and writing variables in PLC. You can easily integrate it in your Qt application.
SNAP7 source: http://snap7.sourceforge.net/wrote on 12 Oct 2018, 03:26 last edited by@kahlenberg said in Qt for plc:
Hi,
I am exactly doing what you wanto to do. Qt doesn't have any possibility for the communication to PLC, by nature. However I communicate with PLC using SNAP7 library. This library is only for Siemens S7 PLCs, and it is really great and you can find pre-compilerd binaries as well, if you don't want to compile yourself. I downloaded and compiled source code and am using this library for reading and writing variables in PLC. You can easily integrate it in your Qt application.
SNAP7 source: http://snap7.sourceforge.net/How did you do it for qtcreator?
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wrote on 12 Oct 2018, 07:33 last edited by
@VRonin said in Qt for plc:
http://doc.qt.io/qtcreator/creator-project-qmake-libraries.html
http://doc.qt.io/qt-5/third-party-libraries.htmlthis is understandable, but I asked about the compilation of the library, since my compiled library does not work
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@VRonin said in Qt for plc:
http://doc.qt.io/qtcreator/creator-project-qmake-libraries.html
http://doc.qt.io/qt-5/third-party-libraries.htmlthis is understandable, but I asked about the compilation of the library, since my compiled library does not work
wrote on 12 Oct 2018, 07:41 last edited by@Zelas91 said in Qt for plc:
but I asked about the compilation of the library
Then this is the wrong place to ask. Try asking on the project page, they should have instructions on how to build
since my compiled library does not work
How does not work? it probably is due to incompatible compilers.
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@Zelas91 said in Qt for plc:
but I asked about the compilation of the library
Then this is the wrong place to ask. Try asking on the project page, they should have instructions on how to build
since my compiled library does not work
How does not work? it probably is due to incompatible compilers.
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wrote on 12 Oct 2018, 08:53 last edited by VRonin 10 Dec 2018, 09:15
That's correct, the .dll is the compiled binary, the .lib is the library your linker will need (the
LIBS +=part of the links above)The .def should not be necessary, it's a module definition file that only works with Microsoft compilers (as far as I'm aware) and is an alternative to the
_declspec( dllimport )/__declspec( dllexport )directives.You'll also need the .h files (or those in the
includesfolder) from the sources (this is theINCLUDEPATH +=part of the links above) -
That's correct, the .dll is the compiled binary, the .lib is the library your linker will need (the
LIBS +=part of the links above)The .def should not be necessary, it's a module definition file that only works with Microsoft compilers (as far as I'm aware) and is an alternative to the
_declspec( dllimport )/__declspec( dllexport )directives.You'll also need the .h files (or those in the
includesfolder) from the sources (this is theINCLUDEPATH +=part of the links above)