Qt5调用Snap7

article/2025/7/16 19:19:52

Snap7是一个与西门子PLC通信的开源库, 在网上下载了一个例子, 研究了一天终于通信成功了, 在此记录一下

项目文件

win32:LIBS += C:\Qt\Qt5.7.0\Tools\mingw530_32\i686-w64-mingw32\lib\libws2_32.a
win32:LIBS += C:\Qt\Qt5.7.0\Tools\mingw530_32\i686-w64-mingw32\lib\libwinmm.aINCLUDEPATH += snap7-full-1.4.2/release/Wrappers/c-cpp/ \snap7-full-1.4.2/src/lib/ \snap7-full-1.4.2/src/core/ \snap7-full-1.4.2/src/sys/SOURCES += main.cpp\mainwindow.cpp \snap7-full-1.4.2/release/Wrappers/c-cpp/snap7.cpp \snap7-full-1.4.2/src/core/s7_client.cpp \snap7-full-1.4.2/src/core/s7_isotcp.cpp \snap7-full-1.4.2/src/core/s7_micro_client.cpp \snap7-full-1.4.2/src/core/s7_partner.cpp \snap7-full-1.4.2/src/core/s7_peer.cpp \snap7-full-1.4.2/src/core/s7_server.cpp \snap7-full-1.4.2/src/core/s7_text.cpp \snap7-full-1.4.2/src/lib/snap7_libmain.cpp \snap7-full-1.4.2/src/sys/snap_msgsock.cpp \snap7-full-1.4.2/src/sys/snap_sysutils.cpp \snap7-full-1.4.2/src/sys/snap_tcpsrvr.cpp \snap7-full-1.4.2/src/sys/snap_threads.cppHEADERS  += mainwindow.h \snap7-full-1.4.2/release/Wrappers/c-cpp/snap7.h \snap7-full-1.4.2/src/core/s7_client.h \snap7-full-1.4.2/src/core/s7_firmware.h \snap7-full-1.4.2/src/core/s7_isotcp.h \snap7-full-1.4.2/src/core/s7_micro_client.h \snap7-full-1.4.2/src/core/s7_partner.h \snap7-full-1.4.2/src/core/s7_peer.h \snap7-full-1.4.2/src/core/s7_server.h \snap7-full-1.4.2/src/core/s7_text.h \snap7-full-1.4.2/src/core/s7_types.h \snap7-full-1.4.2/src/lib/snap7_libmain.h \snap7-full-1.4.2/src/sys/snap_msgsock.h \snap7-full-1.4.2/src/sys/snap_platform.h \snap7-full-1.4.2/src/sys/snap_sysutils.h \snap7-full-1.4.2/src/sys/snap_tcpsrvr.h \snap7-full-1.4.2/src/sys/snap_threads.h \snap7-full-1.4.2/src/sys/sol_threads.h \snap7-full-1.4.2/src/sys/unix_threads.h \snap7-full-1.4.2/src/sys/win_threads.h

libws2_32.a libwinmm.a这两个文件的路径要在本机上找.

连接PLC并进行读写

void MainWindow::on_pushButton_clicked() // 连接
{QByteArray ad(ui->lineEdit->text().toUtf8());char *Address;Address = ad.data();int Rack = ui->lineEdit_2->text().toInt();int Slot = ui->lineEdit_3->text().toInt();int tmp = Client->ConnectTo(Address, Rack, Slot);;showLog("建立连接", QString::number(tmp));
}
void MainWindow::on_pushButton_3_clicked() // write DB
{qint32 buff = ui->lineEdit_5->text().toInt();qDebug() << "write:" << buff;Client->DBWrite(8007, 12, 4, &buff);
}void MainWindow::on_pushButton_4_clicked() // read DB
{qint32 buff;Client->DBRead(8007, 12, 4, &buff);qDebug() << "read:" << buff;
}