diff --git a/.gitignore b/.gitignore
index 97437bf..8d27025 100644
--- a/.gitignore
+++ b/.gitignore
@@ -54,3 +54,5 @@ compile_commands.json
 
 *_qmlcache.qrc
 
+
+/Debug/debug/M3KTE_TERM.exe
diff --git a/M3KTE_TERM/m3kte.cpp b/M3KTE_TERM/m3kte.cpp
index 07d6609..230a60a 100644
--- a/M3KTE_TERM/m3kte.cpp
+++ b/M3KTE_TERM/m3kte.cpp
@@ -981,7 +981,7 @@ void M3KTE::checkAdrChange(QModbusReply *reply, unsigned boardNum)
         reply->deleteLater();
     }
 }
-
+/*
 void M3KTE::onSpeedUpdate()
 {
     stopScanBoard();
@@ -1102,6 +1102,204 @@ void M3KTE::onSpeedUpdate()
     modbusDevice->setTimeout(m_settingsDialog->settings().responseTime);
     beginScanBoards();
 }
+*/
+
+void M3KTE::onSpeedUpdate()
+{
+    stopScanBoard();
+    modbusDevice->setTimeout(500);
+
+    switch(m_deviceSettingsDialog->currentSpeed()) {
+    case 0:
+        tmp_speed = 9600;
+        break;
+    case 1:
+        tmp_speed = 14400;
+        break;
+    case 2:
+        tmp_speed = 19200;
+        break;
+    case 3:
+        tmp_speed = 31250;
+        break;
+    case 4:
+        tmp_speed = 38400;
+        break;
+    case 5:
+        tmp_speed = 56000;
+        break;
+    case 6:
+        tmp_speed = 57600;
+        break;
+    case 7:
+        tmp_speed = 115200;
+        break;
+    }
+    if(tmp_speed == 0) {
+        unsigned newRow = loggerTable->rowCount();
+        loggerTable->insertRow(newRow);
+        loggerTable->setItem(newRow, 0, new QTableWidgetItem((QTime::currentTime().toString("HH:mm:ss"))));
+        loggerTable->setItem(newRow, 1, new QTableWidgetItem(tr("Программная ошибка")));
+        loggerTable->setItem(newRow, 2, new QTableWidgetItem("Неожиданное значение скорости"));
+        loggerTable->setItem(newRow, 3, new QTableWidgetItem(0));
+        loggerTable->setItem(newRow, 4, new QTableWidgetItem("Ошибка при изменении скорости обмена."));
+        loggerTable->resizeColumnsToContents();
+        if(!loggerTable->verticalScrollBar()->isSliderDown())
+            loggerTable->verticalScrollBar()->setSliderPosition(loggerTable->verticalScrollBar()->maximum());
+        beginScanBoards();
+        return;
+    }
+    speedChangeRequests.clear();
+    pendingSpeedChangeRequestsCount = 0;
+    for(int i = 0; i < 4; i++) {
+        speedChangeRequests[i].errorOccurred = false;
+        speedChangeRequests[i].finished = false;
+        speedChangeRequests[i].confirmationReceived = false;
+    }
+
+    for(int i = 0; i < 4; i++) {
+        if(!Boards[i].isActive)
+            continue;
+        QModbusDataUnit unit(QModbusDataUnit::HoldingRegisters, 173, 1);
+        unit.setValue(0, m_deviceSettingsDialog->currentSpeed());
+
+        auto *reply = modbusDevice->sendWriteRequest(unit, Boards[i].adr);
+        if (reply) {
+            SpeedChangeRequest req;
+            req.boardIndex = i;
+            speedChangeRequests.append(req);
+            pendingSpeedChangeRequestsCount++;
+
+            connect(reply, &QModbusReply::finished, this, [this, reply, i]() {
+                this->handleSpeedChangeReply(reply, i);
+            });
+        }
+        else
+        {
+
+        }
+    }
+}
+
+void M3KTE::handleSpeedChangeReply(QModbusReply *reply, int boardIndex)
+{
+    auto it = std::find_if(speedChangeRequests.begin(), speedChangeRequests.end(),
+                           [boardIndex](const SpeedChangeRequest &r) { return r.boardIndex == boardIndex; });
+
+    if (it == speedChangeRequests.end()) {
+        reply->deleteLater();
+        return;
+    }
+
+    // Обновление состояния
+    it->finished = true;
+
+    if (reply->error() != QModbusDevice::TimeoutError) {
+        // Произошла ошибка
+        it->errorOccurred = true; // флаг ошибки
+    }
+
+    reply->deleteLater();
+
+    // Отслеживание завершения всех запросов
+    pendingSpeedChangeRequestsCount--;
+
+    // Проверяем, все ли запросы завершены
+    if (pendingSpeedChangeRequestsCount == 0) {
+        // Проверяем, был ли хоть один сбой (кроме тайм-аутов)
+        bool hasError = false;
+        for (const auto &req : speedChangeRequests) {
+            if (req.errorOccurred) {
+                hasError = true;
+                break;
+            }
+        }
+        if (hasError) {
+            // Был сбой — отменяем переход и восстанавливаем старую скорость
+            // Восстановим старую скорость порта
+            revertToOldSpeedAndRestart();
+            modbusDevice->setTimeout(m_settingsDialog->settings().responseTime);
+            beginScanBoards();
+        } else {
+            onAllSpeedChangeRepliesReceived();
+        }
+    }
+}
+
+void M3KTE::onAllSpeedChangeRepliesReceived()
+{
+    // Переключаемся на tmp_speed
+    modbusDevice->disconnectDevice();
+    modbusDevice->setConnectionParameter(QModbusDevice::SerialBaudRateParameter, tmp_speed);
+    if (!modbusDevice->connectDevice()) {
+        return;
+    }
+
+    QModbusDataUnit unitCheck(QModbusDataUnit::InputRegisters, 85, 1);
+
+    int totalActiveBoards = 0;
+    int confirmedBoards = 0;
+
+    QSet<int> pendingBoards;
+
+    for (int i = 0; i < 4; ++i) {
+        if (!Boards[i].isActive)
+            continue;
+
+        totalActiveBoards++;
+        int slaveAddress = Boards[i].adr;
+
+        QModbusReply *reply = modbusDevice->sendReadRequest(unitCheck, slaveAddress);
+        if (!reply) {
+            revertToOldSpeedAndRestart();
+            return;
+        }
+
+        pendingBoards.insert(slaveAddress);
+
+        connect(reply, &QModbusReply::finished, this, [this, reply, slaveAddress, &confirmedBoards, &pendingBoards, totalActiveBoards]() mutable {
+            if (reply->error() == QModbusDevice::NoError) {
+                // Проверяем что пришел валидный ответ
+                QModbusDataUnit unit = reply->result();
+                if (unit.valueCount() > 0) {
+                    confirmedBoards++;
+                } else {
+
+                }
+            } else {
+
+            }
+
+            pendingBoards.remove(slaveAddress);
+            reply->deleteLater();
+
+            if (pendingBoards.isEmpty()) {
+                if (confirmedBoards != totalActiveBoards) {
+                    revertToOldSpeedAndRestart();
+                    beginScanBoards();
+                } else {
+                    modbusDevice->setTimeout(m_settingsDialog->settings().responseTime);
+                    beginScanBoards();
+                }
+            }
+        });
+    }
+    // Если нет ни одной активной платы — сразу запускаем сканирование
+    if (totalActiveBoards == 0) {
+        modbusDevice->setTimeout(m_settingsDialog->settings().responseTime);
+        beginScanBoards();
+    }
+}
+
+// Вспомогательная функция восстановления старой скорости
+void M3KTE::revertToOldSpeedAndRestart()
+{
+    modbusDevice->disconnectDevice();
+    modbusDevice->setConnectionParameter(QModbusDevice::SerialBaudRateParameter,
+                                         m_settingsDialog->curBaud());
+    modbusDevice->setTimeout(m_settingsDialog->settings().responseTime);
+    modbusDevice->connectDevice();
+}
 
 void M3KTE::onParityUpdate()
 {
@@ -1861,23 +2059,18 @@ bool M3KTE::autoBaudRateScan()
                 }
                 QCoreApplication::processEvents();
             }
-            if(isRun)
-            {
+            if(isRun) {
                 onConnectClicked();
                 bar->close();
                 bar->deleteLater();
                 return false;
-            }
-            else if(!isRun)
-            {
+            } else if(!isRun) {
                 //Нужна проверка типа устройства
-                if(reply->error()==QModbusDevice::NoError)
-                {
+                if(reply->error()==QModbusDevice::NoError) {
                     QModbusResponse resp = reply->rawResult();
                     QString result = QString(resp.data().remove(0, MODBUS_REQUEST_PROTOCOL_INFO_LENGTH));
                     //result.remove(0, MODBUS_REQUEST_PROTOCOL_INFO_LENGTH);
-                    if(result == QString("KTE"))
-                    {
+                    if(result == QString("KTE")) {
                         countOfDeviceOnLine++;
                         KTE[i].append(tmp_adr);
                     }
@@ -1889,17 +2082,12 @@ bool M3KTE::autoBaudRateScan()
         countOfDeviceOnLine = 0;
         modbusDevice->disconnectDevice();
     }
-    if(m_scanBoard->exec()==QDialog::Accepted)
-    {
-        if(m_scanBoard->getCheckState()==Qt::Checked)
-        {
-            for(int i = 0; i < 8; i++)
-            {
-                for(int j = 0; j < KTE[i].size(); j++)
-                {
+    if(m_scanBoard->exec()==QDialog::Accepted) {
+        if(m_scanBoard->getCheckState()==Qt::Checked) {
+            for(int i = 0; i < 8; i++) {
+                for(int j = 0; j < KTE[i].size(); j++) {
                     for(int l = i; l < 8; l++) {
-                        if(KTE[l].indexOf(KTE[i].at(j))==-1)
-                        {
+                        if(KTE[l].indexOf(KTE[i].at(j))==-1) {
                             QMessageBox::warning(this, "Error", QString("Несколько устройств по адресу %1, работающих на скоростях %2 и %3.").arg(KTE[i].at(j)).arg(m_baud[i]).arg(m_baud[l]));
                             return false;
                         }
@@ -1912,25 +2100,21 @@ bool M3KTE::autoBaudRateScan()
             for(int i = 0; i < 8; i++) {
                 bar->setValue(i);
                 bar->setLabelText(tr("Синхронизация плат на скорости %1").arg(m_baud[i]));
-                for(int j = 0; j < KTE[i].size(); j++)
-                {
+                for(int j = 0; j < KTE[i].size(); j++) {
                     modbusDevice->setConnectionParameter(QModbusDevice::SerialBaudRateParameter,
                                                          m_baud[i]);
                     if(!modbusDevice->connectDevice()) {
                         statusBar()->showMessage(tr("Connect failed: ") + modbusDevice->errorString(), 5000);
                     }
                     auto *reply = modbusDevice->sendWriteRequest(*_unit, KTE[i].at(j));
-                    if(!reply)
-                    {
+                    if(!reply) {
                         onConnectClicked();
                         bar->close();
                         bar->deleteLater();
                         return false;
                     }
-                    while(!reply->isFinished())
-                    {
-                        if(isRun)
-                        {
+                    while(!reply->isFinished()) {
+                        if(isRun) {
                             //dfQMessageBox::warning(this, "Ошибка при синхронизации скоростей.", QString("Прерывание по запросу пользователя."));
                             onConnectClicked();
                             bar->close();
@@ -1939,19 +2123,15 @@ bool M3KTE::autoBaudRateScan()
                         }
                         QCoreApplication::processEvents();
                     }
-                    if(reply->error()==QModbusDevice::TimeoutError)
-                    {
+                    if(reply->error()==QModbusDevice::TimeoutError) {
                         modbusDevice->disconnectDevice();
                         modbusDevice->setConnectionParameter(QModbusDevice::SerialBaudRateParameter,
                                                              m_settingsDialog->UpdateBaud(m_scanBoard->getBaud()));
                         modbusDevice->connectDevice();
                         QModbusDataUnit* _unit = new QModbusDataUnit(QModbusDataUnit::InputRegisters, 85, 1);
-                        if(auto *subreply = modbusDevice->sendReadRequest(*_unit, Boards[i].adr))
-                        {
-                            while(!subreply->isFinished())
-                            {
-                                if(isRun)
-                                {
+                        if(auto *subreply = modbusDevice->sendReadRequest(*_unit, Boards[i].adr)) {
+                            while(!subreply->isFinished()) {
+                                if(isRun) {
                                     //dfQMessageBox::warning(this, "Ошибка при получении текущих настроек.", QString("Прерывание по запросу пользователя."));
                                     onConnectClicked();
                                     bar->close();
@@ -1960,8 +2140,7 @@ bool M3KTE::autoBaudRateScan()
                                 }
                                 QCoreApplication::processEvents();
                             }
-                            if(subreply->error()!=QModbusDevice::NoError)
-                            {
+                            if(subreply->error()!=QModbusDevice::NoError) {
                                 //QMessageBox::warning();
                                 onConnectClicked();
                                 bar->close();
@@ -1970,8 +2149,7 @@ bool M3KTE::autoBaudRateScan()
                             }
                         }
                     }
-                    else if(reply->error()!=QModbusDevice::NoError)
-                    {
+                    else if(reply->error()!=QModbusDevice::NoError) {
                         return false;
                     }
                     modbusDevice->disconnectDevice();
diff --git a/M3KTE_TERM/m3kte.h b/M3KTE_TERM/m3kte.h
index 1d9b702..90aedec 100644
--- a/M3KTE_TERM/m3kte.h
+++ b/M3KTE_TERM/m3kte.h
@@ -84,6 +84,10 @@ private slots:
 
     void boardScan(unsigned boardID);
 
+    void handleSpeedChangeReply(QModbusReply *reply, int boardIndex);
+    void onAllSpeedChangeRepliesReceived();
+    void revertToOldSpeedAndRestart();
+
 public:
     M3KTE(QWidget *parent = nullptr);
     ~M3KTE();
@@ -159,5 +163,17 @@ private:
         }ParsingReg;
         unsigned AllReg:16;
     };
+
+    // Структура для отслеживания состояния запроса смены скорости
+    struct SpeedChangeRequest {
+        int boardIndex;
+        bool errorOccurred = false;
+        bool finished = false;
+        bool confirmationReceived = false;
+    };
+    QVector<SpeedChangeRequest> speedChangeRequests;
+    int pendingSpeedChangeRequestsCount = 0;
+    int pendingConfirmationsCount = 0;
+    unsigned tmp_speed = 0;
 };
 #endif // M3KTE_H