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QT与基恩士PLC采用上位链路通信实现

也可以称为tcp/ip通信。只不过需要和基恩士的通讯协议相匹配。

1.pro文件中添加：

QT       += core gui serialport network

2. 头文件：

#ifndef MAINWINDOW_H
#define MAINWINDOW_H#include <QMainWindow>
#include <QTcpSocket>
#include <QTimer>
#include <QString>
#include<QPushButton>
#include<QLineEdit>
#include<QLabel>
#include <QVBoxLayout>
#include <QLabel>
#include <QPushButton>
#include <QLineEdit>
#include <QMessageBox>
#include <QHostAddress>
#include <iostream>
#if _MSC_VER >= 1600
#pragma execution_character_set("utf-8")
#endifQT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACEclass MainWindow : public QMainWindow
{Q_OBJECTpublic:MainWindow(QWidget *parent = nullptr);~MainWindow();public slots:void onSocketConnected();void onSocketDisconnected();void onSocketError(QAbstractSocket::SocketError socketError);void onReadyRead();private slots:void on_connectButton_clicked();void on_readButton_clicked();void on_sendButton_clicked();void on_disconnectButton_clicked();private:void connectToPLC();bool isConnected();Ui::MainWindow *ui;QTcpSocket *clientSocket;int m_nState;// 定义状态常量static const int IN_OFFLINE = 0;static const int IN_CONNECTING = 1;static const int IN_IDLE = 2;struct {unsigned char nField0;unsigned char nField1;unsigned char nField2;unsigned char nField3;unsigned short nPort;} ipCom;bool WriteWord(int address, int wordValue);bool ReadWord(int address, int &value);};
#endif // MAINWINDOW_H

3.连接PLC

void MainWindow::connectToPLC()
{if (clientSocket->state() == QAbstractSocket::UnconnectedState) {clientSocket->connectToHost(QHostAddress(QString("%1.%2.%3.%4").arg(ipCom.nField0).arg(ipCom.nField1).arg(ipCom.nField2).arg(ipCom.nField3)),ipCom.nPort);} else {clientSocket->disconnectFromHost();}
}void MainWindow::on_connectButton_clicked()
{QString ipAddress = ui->ipLineEdit->text();// 将输入的 IP 地址拆分成四部分QStringList ipParts = ipAddress.split(".");// 检查输入是否有效（是否正好有四个部分）if (ipParts.size() == 4) {bool ok = true;// 将每部分转换为 unsigned char 类型，并赋值给结构体ipCom.nField0 = ipParts[0].toUInt(&ok); // 转换为整数ipCom.nField1 = ipParts[1].toUInt(&ok);ipCom.nField2 = ipParts[2].toUInt(&ok);ipCom.nField3 = ipParts[3].toUInt(&ok);}ipCom.nPort = ui->portLineEdit->text().toInt();connectToPLC();
}

4.读写寄存器

…略…

5实现效果:

quan * bu * dai *ma *qing *si * liao