案例分享：Qt modbusTcp调试工具(读写Byte、Int、DInt、Real、DReal)（当前v1.0.0）

news/2024/11/17 21:36:49/文章来源:https://www.cnblogs.com/qq21497936/p/18293821

前言

西门子PLC、台达PLC、法兰克机床等等多年以前玩得比较多，有tcp/ip通讯也有modbus通讯，modbus又分为网络，485，232等。
医疗项目，焊接机器人项目，工控机床项目，数控项目，物联网项目用的挺多的，将关键的通信技术抽离出来，单独弄成工具。
最近调绞车，遇到了modbus tcp，正好有设备，于是额外花时间单独抽出来作为调试工具。

需求

与各种其他行业仪器通讯软件开发的通讯核心模块，modbus功能模块，制作成调试工具，可满足一般情况的调试。
1.支持通过TCP端口进行通讯；(区别于modbus rtu 232/485)
2.支持设置打开从机的ip地址、端口和超时参数；
3.支持写入bool，int，dInt，real，dReal参数类型数据；
4.支持读取bool，int，dInt，real，dReal参数类型数据；
5.增加容错处理，连接后modbusTcp可能存在读写失败，增加容错处理机制，使其每次读写都能成功。

Demo

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工具下载地址

CSDN（0积分下载）：https://download.csdn.net/download/qq21497936/89529006
QQ群：1047134658（点击“文件”搜索“modbus ”，群内与博文同步更新）

相关头文件源码

PlcModbusMasterWidget.h

在这里插入图片描述

#ifndef MODBUSTCPWIDGET_H
#define MODBUSTCPWIDGET_H/************************************************************\* 控件名称： modbus Master管理应用* 控件描述：*          1.使用modbusTcp打开*          2.PLC读取bool、int、dInt、real(float)、dReal(double)*          3.PLC写入bool、int、dInt、real(float)、dReal(double)* 其他说明：*          在ModbusTCP协议中，从机地址的概念与ModbusRTU有所不同。*          在ModbusTCP中，通常不直接通过从机地址来区分不同的设备，*          而是通过IP地址和端口号来识别和连接特定的Modbus服务器（从机）。* 著作权信息*      作者：长沙红胖子Qt*      公司：长沙创微智科信息技术有限公司*      网址：www.chuangweizhike.com*      博客导航：https://hpzwl.blog.csdn.net/article/details/102478062*      联系方式：QQ(21497936) 微信(yangsir198808)* 版本信息*       日期             版本         描述*   2024年07月09日     v1.0.0       基础功能，支持线圈、int、dint、单精度浮点，双精度浮点类型*                                  读写失败容错处理执行机制
\************************************************************/#include <QWidget>
#include <QThread>
#include <QDateTime>
#include <QElapsedTimer>
#include <QHash>
#include <QFile>
#include <QMessageBox>
#include <QAbstractButton>
#include "ModbusTcpManager.h"namespace Ui {
class ModbusTcpWidget;
}class ModbusTcpWidget : public QWidget
{Q_OBJECTpublic:explicit ModbusTcpWidget(QWidget *parent = 0);~ModbusTcpWidget();protected:void initControl();protected slots:void slot_connected(bool connected);void slot_disConnected();void slot_readBitsResult(bool result, int startAddr, QList<bool> listBool);void slot_readIntsResult(bool result, int startAddr, QList<int> listInt);void slot_readDIntsResult(bool result, int startAddr, QList<int> listInt);void slot_readRealsResult(bool result, int startAddr, QList<float> listFloat);void slot_readDRealsResult(bool result, int startAddr, QList<double> listDouble);void slot_writeBitsResult(bool result, int startAddr, QList<bool> listBool);void slot_writeIntsResult(bool result, int startAddr, QList<int> listInt);void slot_writeDIntsResult(bool result, int startAddr, QList<int> listInt);void slot_writeRealsResult(bool result, int startAddr, QList<float> listFloat);void slot_writeDRealsResult(bool result, int startAddr, QList<double> listDouble);private slots:void on_comboBox_writeType_currentIndexChanged(int index);void on_lineEdit_readStartAddr_textChanged(const QString &arg1);void on_lineEdit_writeStartAddr_textChanged(const QString &arg1);void on_lineEdit_readStartAddrHex_textChanged(const QString &arg1);void on_lineEdit_writeStartAddrHex_textChanged(const QString &arg1);private slots:void on_pushButton_connect_clicked();void on_pushButton_disconnect_clicked();void on_pushButton_read_clicked();void on_pushButton_write_clicked();void on_pushButton_clear_clicked();private:Ui::ModbusTcpWidget *ui;QThread *_pModbusManagerThread;QElapsedTimer _elapsedTimer;
};#endif // MODBUSTCPWIDGET_H

ModbusManager.h

#ifndef MODBUSTCPMANAGER_H
#define MODBUSTCPMANAGER_H#include <QObject>
#include <QMutex>union RealByte {float f;quint8 buf[4];
};union DRealByte {double f;quint8 buf[8];
};#include "modbus/modbus.h"
#include "modbus/modbus-version.h"
#include "modbus/modbus-rtu.h"
#include "modbus/modbus-tcp.h"class ModbusTcpManager : public QObject
{Q_OBJECT
private:explicit ModbusTcpManager(QObject *parent = 0);public:bool testEnvAndRtu();public:static ModbusTcpManager *getInstance();public:void setIp(const QString &ip);void setPort(const quint16 &port);void setTimeOutMs(int timeOutMs);public:QString getIp() const;quint16 getPort() const;int getTimeOutMs() const;signals:void signal_connected(bool connected);void signal_disConnected();void signal_readBitsResult(bool result, int startAddr, QList<bool> listBool);void signal_readIntsResult(bool result, int startAddr, QList<int> listInt);void signal_readDIntsResult(bool result, int startAddr, QList<int> listInt);void signal_readRealsResult(bool result, int startAddr, QList<float> listFloat);void signal_readDRealsResult(bool result, int startAddr, QList<double> listDouble);void signal_writeBitsResult(bool result, int startAddr, QList<bool> listBool);void signal_writeIntsResult(bool result, int startAddr, QList<int> listInt);void signal_writeDIntsResult(bool result, int startAddr, QList<int> listInt);void signal_writeRealsResult(bool result, int startAddr, QList<float> listFloat);void signal_writeDRealsResult(bool result, int startAddr, QList<double> listDouble);public slots:void slot_start();void slot_stop();void slot_connect();void slot_disConnect();void slot_readBits(int startAddr, int size);void slot_readInts(int startAddr, int size);void slot_readDInts(int startAddr, int size);void slot_readReals(int startAddr, int size);void slot_readDReals(int startAddr, int size);void slot_writeBits(int startAddr, QList<bool> listBool);void slot_writeInts(int startAddr, QList<int> listInt);void slot_writeDInts(int startAddr, QList<int> listInt);void slot_writeReals(int startAddr, QList<float> listFloat);void slot_writeDReals(int startAddr, QList<double> listDouble);private:static ModbusTcpManager *_pInstance;static QMutex _mutex;private:QString _ip;quint16 _port;int _timeOutMs;private:bool _running;bool _connected;private:modbus_t *_pModbus;};#endif // MODBUSTCPMANAGER_H