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Qt for plc

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qt creatorsiemenswpf
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  • SGaistS SGaist

    Hi and welcome to devnet,

    How are you communicating currently with your PLC ?

    M Offline
    M Offline
    markolino
    wrote on last edited by
    #3

    @SGaist
    Hi thanks for the answer. Usually I communicate with my plc with a Windows form app using s7.net librery. All by profinet connection

    1 Reply Last reply
    0
    • VRoninV Offline
      VRoninV Offline
      VRonin
      wrote on last edited by
      #4

      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

      "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
      ~Napoleon Bonaparte

      On a crusade to banish setIndexWidget() from the holy land of Qt

      1 Reply Last reply
      4
      • kahlenbergK Offline
        kahlenbergK Offline
        kahlenberg
        wrote on last edited by
        #5

        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/

        Z 2 Replies Last reply
        3
        • kahlenbergK kahlenberg

          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/

          Z Offline
          Z Offline
          Zelas91
          wrote on last edited by
          #6
          This post is deleted!
          1 Reply Last reply
          0
          • kahlenbergK kahlenberg

            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/

            Z Offline
            Z Offline
            Zelas91
            wrote on last edited by
            #7

            @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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            0
            • VRoninV Offline
              VRoninV Offline
              VRonin
              wrote on last edited by
              #8

              http://doc.qt.io/qtcreator/creator-project-qmake-libraries.html
              http://doc.qt.io/qt-5/third-party-libraries.html

              "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
              ~Napoleon Bonaparte

              On a crusade to banish setIndexWidget() from the holy land of Qt

              Z 1 Reply Last reply
              3
              • VRoninV VRonin

                http://doc.qt.io/qtcreator/creator-project-qmake-libraries.html
                http://doc.qt.io/qt-5/third-party-libraries.html

                Z Offline
                Z Offline
                Zelas91
                wrote on last edited by
                #9

                @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.html

                this is understandable, but I asked about the compilation of the library, since my compiled library does not work

                VRoninV 1 Reply Last reply
                0
                • Z Zelas91

                  @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.html

                  this is understandable, but I asked about the compilation of the library, since my compiled library does not work

                  VRoninV Offline
                  VRoninV Offline
                  VRonin
                  wrote on last edited by
                  #10

                  @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.

                  "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                  ~Napoleon Bonaparte

                  On a crusade to banish setIndexWidget() from the holy land of Qt

                  Z 1 Reply Last reply
                  1
                  • VRoninV VRonin

                    @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.

                    Z Offline
                    Z Offline
                    Zelas91
                    wrote on last edited by
                    #11

                    @VRonin
                    did everything according to the instructions for the library but when compiling it turns out 3 files * .def, * .lib, * .dll

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                    0
                    • VRoninV Offline
                      VRoninV Offline
                      VRonin
                      wrote on last edited by VRonin
                      #12

                      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 includes folder) from the sources (this is the INCLUDEPATH += part of the links above)

                      "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                      ~Napoleon Bonaparte

                      On a crusade to banish setIndexWidget() from the holy land of Qt

                      Z 1 Reply Last reply
                      6
                      • VRoninV VRonin

                        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 includes folder) from the sources (this is the INCLUDEPATH += part of the links above)

                        Z Offline
                        Z Offline
                        Zelas91
                        wrote on last edited by
                        #13

                        @VRonin
                        Thanks, I will try

                        1 Reply Last reply
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