qt读写plc寄存器
时间: 2023-09-21 17:07:30 浏览: 73
在QT中读写PLC寄存器可以使用串口通信或者TCP/IP通信。对于串口通信,你可以使用QSerialPort类来设置串口参数并打开串口,然后通过串口发送数据给PLC。下面是一个串口通信的示例代码:
```
serial->setPortName("com4");
serial->setBaudRate(QSerialPort::Baud9600);
serial->setDataBits(QSerialPort::Data7);
serial->setParity(QSerialPort::EvenParity);
serial->setStopBits(QSerialPort::OneStop);
if(serial->open(QIODevice::ReadWrite)) {
qDebug()<<"connect success";
}
// 发送数据给PLC
QString command = "01 14";
QString address = convert10216(ui->address->text().toInt(), 6);
QString data = command + " " + address + " " + otherData;
QByteArray array = QByteArray::fromHex(data.toLatin1());
serial->write(array);
```
对于TCP/IP通信,你可以使用QTcpSocket类来与PLC进行通信。首先初始化一个QTcpSocket对象,并设置连接的参数,然后通过连接PLC成功的信号槽函数来进行读写操作。下面是一个TCP/IP通信的示例代码:
```
network = new QTcpSocket(this);
timeout = 1000;
// 初始化连接
connect(network, &QTcpSocket::connected, [](){
qDebug() << "Connected to PLC successfully!" << endl;
});
connect(network, &QTcpSocket::disconnected, [](){
qDebug() << "Disconnected from PLC!" << endl;
});
connect(network, &QTcpSocket::stateChanged, [](QAbstractSocket::SocketState socketState){
qDebug() << "SocketState changed: " << socketState;
});
connect(network, &QTcpSocket::readyRead, [&(){
readData();
});
// 发送数据给PLC
QString command = "01 14";
QString address = convert10216(ui->address->text().toInt(), 6);
QString data = command + " " + address + " " + otherData;
QByteArray array = QByteArray::fromHex(data.toLatin1());
network->write(array);
network->waitForBytesWritten();
network->flush();
```
以上是使用QT读写PLC寄存器的示例代码,你可以根据你的具体情况进行参数设置和数据发送。
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