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。

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.支持通过串口232,485端口进行通讯；
  2.支持设置打开端口的参数；
  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10种主题风格切换（仅用于预选择主题风格）；

Demo

工具下载地址

  CSDN（0积分下载）：https://download.csdn.net/download/qq21497936/19236703
QQ群：1047134658（点击“文件”搜索“plcModbus ”，群内与博文同步更新）

十种主题风格切换

相关头文件源码

PlcModbusMasterWidget.h

#ifndef PLCMODBUSMASTERWIDGET_H
#define PLCMODBUSMASTERWIDGET_H

#include <QWidget>
#include <QThread>
#include <QDateTime>
#include <QElapsedTimer>
#include <QHash>
#include <QFile>
#include <QMessageBox>
#include <QAbstractButton>
#include "ModbusManager.h"

namespace Ui {
class PlcModbusMasterWidget;
}

class PlcModbusMasterWidget : public QWidget
{
    Q_OBJECT

public:
    explicit PlcModbusMasterWidget(QWidget *parent = 0);
    ~PlcModbusMasterWidget();

protected slots:
    void slot_opened(bool opened);
    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);

protected slots:
    void slot_buttonClicked(int index);

private slots:
    void on_pushButton_open_clicked();
    void on_pushButton_close_clicked();
    void on_pushButton_read_clicked();
    void on_pushButton_write_clicked();
    void on_pushButton_clearM_clicked();

private:
    Ui::PlcModbusMasterWidget *ui;

    QThread *_pModbusManagerThread;
    QElapsedTimer _elapsedTimer;

    QHash<int, QString> _hashInt2Str;
};

#endif // PLCMODBUSMASTERWIDGET_H

ModbusManager.h

#ifndef MODBUSMANAGER_H
#define MODBUSMANAGER_H

#include <QObject>
#include <QMutex>

class ModbusManager : public QObject
{
    Q_OBJECT
private:
    explicit ModbusManager(QObject *parent = 0);

public:
    bool testEnvAndRtu();

public:
    static ModbusManager *getInstance();

public:
    void setPortName(const QString &portName);
    void setBaud(int baud);
    void setParity(char parity);
    void setDataBit(int dataBit);
    void setStopBit(int stopBit);
    void setTimeOutMs(int timeOutMs);
    void setSlaveAddr(int slaveAddr);

public:
    QString getPortName() const;
    int getBaud() const;
    char getParity() const;
    int getDataBit() const;
    int getStopBit() const;
    int getTimeOutMs() const;
    int getSlaveAddr() const;

signals:
    void signal_opened(bool opened);

    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_open();
    void slot_close();

    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 ModbusManager *_pInstance;
    static QMutex _mutex;

private:
    QString _portName;
    int _baud;
    char _parity;
    int _dataBit;
    int _stopBit;
    int _timeOutMs;
    int _slaveAddr;

private:
    bool _running;
    bool _opened;
};

#endif // MODBUSMANAGER_H

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