Removed error when machine doesnt have curve so node-red doesnt crash when you dont select a machine

rotatingMachine.html

@@ -1,3 +1,13 @@
+<!--
+| S88-niveau             | Primair (blokkleur) | Tekstkleur |
+| ---------------------- | ------------------- | ---------- |
+| **Area**               | `#0f52a5`           | wit        |
+| **Process Cell**       | `#0c99d9`           | wit        |
+| **Unit**               | `#50a8d9`           | zwart      |
+| **Equipment (Module)** | `#86bbdd`           | zwart      |
+| **Control Module**     | `#a9daee`           | zwart      |
+
+-->
 <!-- Load the dynamic menu & config endpoints -->
 <script src="/rotatingMachine/menu.js"></script>
 <script src="/rotatingMachine/configData.js"></script>
@@ -5,7 +15,7 @@
 <script>
   RED.nodes.registerType("rotatingMachine", {
     category: "EVOLV",
-    color: "#4f8582",
+    color: "#86bbdd",
         defaults: {
 
           // Define specific properties
@@ -41,10 +51,10 @@
     outputs: 3,
     inputLabels: ["Input"],
     outputLabels: ["process", "dbase", "parent"],
-    icon: "font-awesome/fa-tachometer",
+    icon: "font-awesome/fa-cog",
 
     label: function () {
-      return this.positionIcon + " " + this.category.slice(0, -1) || "Machine";
+      return this.positionIcon + " " + this.category || "Machine";
     },
 
     oneditprepare: function() {
@@ -68,6 +78,7 @@
     },
     oneditsave: function() {
       const node = this;
+
       // save asset fields
       if (window.EVOLV?.nodes?.rotatingMachine?.assetMenu?.saveEditor) {
         window.EVOLV.nodes.rotatingMachine.assetMenu.saveEditor(this);

src/nodeClass.js

@@ -62,7 +62,7 @@ class nodeClass {
         unit: uiConfig.unit
       },
       functionality: {
-        positionVsParent: uiConfig.positionVsParent || 'atEquipment', // Default to 'atEquipment' if not specified
+        positionVsParent: uiConfig.positionVsParent
       }
     };
 
@@ -114,8 +114,8 @@ class nodeClass {
     try {
           const mode = m.currentMode;
           const state = m.state.getCurrentState();
-          const flow = Math.round(m.measurements.type("flow").variant("predicted").position('downstream').getCurrentValue());
-          const power = Math.round(m.measurements.type("power").variant("predicted").position('upstream').getCurrentValue());
+          const flow = Math.round(m.measurements.type("flow").variant("predicted").position('downstream').getCurrentValue('m3/h'));
+          const power = Math.round(m.measurements.type("power").variant("predicted").position('atequipment').getCurrentValue('kW'));
           let symbolState;
           switch(state){
             case "off":
@@ -145,6 +145,9 @@ class nodeClass {
             case "decelerating":
               symbolState = "⏪";
               break;
+            case "maintenance":
+              symbolState = "🔧";
+              break;
           }
           const position = m.state.getCurrentPosition();
           const roundedPosition = Math.round(position * 100) / 100;
@@ -224,8 +227,8 @@ class nodeClass {
     //this.source.tick();
 
     const raw = this.source.getOutput();
-    const processMsg = this._output.formatMsg(raw, this.config, 'process');
-    const influxMsg  = this._output.formatMsg(raw, this.config, 'influxdb');
+    const processMsg = this._output.formatMsg(raw, this.source.config, 'process');
+    const influxMsg  = this._output.formatMsg(raw, this.source.config, 'influxdb');
 
     // Send only updated outputs on ports 0 & 1
     this.node.send([processMsg, influxMsg]);

src/specificClass.js

@@ -1,51 +1,6 @@
-/**
- * @file machine.js
- *
- * Permission is hereby granted to any person obtaining a copy of this software 
- * and associated documentation files (the "Software"), to use it for personal 
- * or non-commercial purposes, with the following restrictions:
- *
- * 1. **No Copying or Redistribution**: The Software or any of its parts may not 
- *    be copied, merged, distributed, sublicensed, or sold without explicit 
- *    prior written permission from the author.
- * 
- * 2. **Commercial Use**: Any use of the Software for commercial purposes requires 
- *    a valid license, obtainable only with the explicit consent of the author.
- * 
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
- * FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER 
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT, OR OTHERWISE, ARISING FROM, 
- * OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
- * SOFTWARE.
- *
- * Ownership of this code remains solely with the original author. Unauthorized 
- * use of this Software is strictly prohibited.
- *
- * @summary A class to interact and manipulate machines with a non-euclidian curve
- * @description A class to interact and manipulate machines with a non-euclidian curve
- * @module machine
- * @exports machine
- * @version 0.1.0
- * @since 0.1.0
- * 
- * Author:
- * - Rene De Ren
- * Email:
- * - r.de.ren@brabantsedelta.nl
- * 
- *  Add functionality later
-  // -------- Operational Metrics -------- //
-maintenanceAlert: this.state.checkMaintenanceStatus()
-
-
-*/
-
-//load local dependencies
 const EventEmitter = require('events');
-const {loadCurve,logger,configUtils,configManager,state, nrmse, MeasurementContainer, predict, interpolation , childRegistrationUtils} = require('generalFunctions');
-const { name } = require('../../generalFunctions/src/convert/lodash/lodash._shimkeys');
+const {loadCurve,gravity,logger,configUtils,configManager,state, nrmse, MeasurementContainer, predict, interpolation , childRegistrationUtils,coolprop} = require('generalFunctions');
+const pressure = require('../../generalFunctions/src/convert/definitions/pressure');
 
 class Machine {
 
@@ -71,7 +26,7 @@ class Machine {
     this.config = this.configUtils.updateConfig(this.config, {general:{name: this.config.functionality?.softwareType + "_" + machineConfig.general.id}}); // add unique name if not present
 
     if (!this.model || !this.curve) {
-      this.logger.warn(`${!this.model ? 'Model not specified' : 'Curve not found for model ' + this.model} in machineConfig. Cannot make predictions.`);
+      this.logger.error(`${!this.model ? 'Model not specified' : 'Curve not found for model ' + this.model} in machineConfig. Cannot make predictions.`);
       // Set prediction objects to null to prevent method calls
       this.predictFlow = null;
       this.predictPower = null;
@@ -80,10 +35,8 @@ class Machine {
     }
     else{
       this.hasCurve = true;
-          this.config = this.configUtils.updateConfig(this.config, { 
-      asset: { ...this.config.asset, machineCurve: this.curve } 
-    });
-      machineConfig = { ...machineConfig, asset: { ...machineConfig.asset, machineCurve: this.curve } }; // Merge curve into machineConfig
+      this.config = this.configUtils.updateConfig(this.config, { asset: { ...this.config.asset, machineCurve: this.curve } }); 
+      //machineConfig = { ...machineConfig, asset: { ...machineConfig.asset, machineCurve: this.curve } }; // Merge curve into machineConfig
       this.predictFlow = new predict({ curve: this.config.asset.machineCurve.nq });     // load nq (x : ctrl , y : flow relationship) 
       this.predictPower = new predict({ curve: this.config.asset.machineCurve.np });     // load np (x : ctrl , y : power relationship)
       this.predictCtrl = new predict({ curve: this.reverseCurve(this.config.asset.machineCurve.nq) }); // load reversed nq (x: flow, y: ctrl relationship)
@@ -93,7 +46,17 @@ class Machine {
     this.errorMetrics = new nrmse(errorMetricsConfig, this.logger);
 
     // Initialize measurements
-    this.measurements = new MeasurementContainer();
+    this.measurements = new MeasurementContainer({
+      autoConvert: true,
+      windowSize: 50,
+      defaultUnits: {
+        pressure: 'mbar',
+        flow: this.config.general.unit,
+        power: 'kW',
+        temperature: 'C'
+      }
+    });
+
     this.interpolation = new interpolation();
 
     this.flowDrift = null;
@@ -113,25 +76,57 @@ class Machine {
       this.updatePosition();
     });
 
+    //When state changes look if we need to do other updates
+    this.state.emitter.on("stateChange", (newState) => {
+      this.logger.debug(`State change detected: ${newState}`);
+      this._updateState();
+    });
+
+
+    //perform init for certain values
+    this._init();
+
     this.child = {}; // object to hold child information so we know on what to subscribe
     this.childRegistrationUtils = new childRegistrationUtils(this); // Child registration utility
 
+
+  }
+
+  _init(){
+    //assume standard temperature is 20degrees
+    this.measurements.type('temperature').variant('measured').position('atEquipment').value(15).unit('C');
+    //assume standard atm pressure is at sea level
+    this.measurements.type('atmPressure').variant('measured').position('atEquipment').value(101325).unit('Pa');
+  }
+
+  _updateState(){
+    const isOperational = this._isOperationalState();
+    if(!isOperational){
+      //overrule the last prediction this should be 0 now
+      this.measurements.type("flow").variant("predicted").position("downstream").value(0);
+      this.measurements.type("flow").variant("predicted").position("atEquipment").value(0);
+    }
   }
 
   /*-------------------               Register child events               -------------------*/
   registerChild(child, softwareType) {
-    this.logger.debug('Setting up child event listeners');
+    this.logger.debug('Setting up child event for softwaretype ' + softwareType);
 
     if(softwareType === "measurement"){
           const position = child.config.functionality.positionVsParent;
+          const distance = child.config.functionality.distanceVsParent || 0;
           const measurementType = child.config.asset.type;
           const key = `${measurementType}_${position}`;
+          //rebuild to measurementype.variant no position and then switch based on values not strings or names.
           const eventName = `${measurementType}.measured.${position}`;
 
+          this.logger.debug(`Setting up listener for ${eventName} from child ${child.config.general.name}`);
           // Register event listener for measurement updates
           child.measurements.emitter.on(eventName, (eventData) => {
           this.logger.debug(`🔄 ${position} ${measurementType} from ${eventData.childName}: ${eventData.value} ${eventData.unit}`);
       
+
+          this.logger.debug(` Emitting... ${eventName} with data:`);
           // Store directly in parent's measurement container
           this.measurements
             .type(measurementType)
@@ -205,46 +200,68 @@ _callMeasurementHandler(measurementType, value, position, context) {
   // -------- Mode and Input Management -------- //
   isValidSourceForMode(source, mode) {
     const allowedSourcesSet = this.config.mode.allowedSources[mode] || [];
-    return allowedSourcesSet.has(source);
+    const allowed = allowedSourcesSet.has(source);
+    allowed? 
+    this.logger.debug(`source is allowed proceeding with ${source} for mode ${mode}`) : 
+    this.logger.warn(`${source} is not allowed in mode ${mode}`);
+
+    return allowed;
   }
 
   isValidActionForMode(action, mode) {
     const allowedActionsSet = this.config.mode.allowedActions[mode] || [];
-    return allowedActionsSet.has(action);
+    const allowed = allowedActionsSet.has(action);
+    allowed ? 
+    this.logger.debug(`Action is allowed proceeding with ${action} for mode ${mode}`) : 
+    this.logger.warn(`${action} is not allowed in mode ${mode}`);
+
+    return allowed;
   }
 
   async handleInput(source, action, parameter) {
-    if (!this.isValidSourceForMode(source, this.currentMode)) {
-      let warningTxt = `Source '${source}' is not valid for mode '${this.currentMode}'.`;
-      this.logger.warn(warningTxt);
-      return {status : false , feedback: warningTxt};
-    }
-    
 
+    //sanitize input
+    if( typeof action !== 'string'){this.logger.error(`Action must be string`); return;}
+    //convert to lower case to avoid to many mistakes in commands
+    action = action.toLowerCase();
+
+    // check for validity of the request
+    if(!this.isValidActionForMode(action,this.currentMode)){return ;}
+    if (!this.isValidSourceForMode(source, this.currentMode)) {return ;}
+    
     this.logger.info(`Handling input from source '${source}' with action '${action}' in mode '${this.currentMode}'.`);
+    
     try {
       switch (action) {
-        case "execSequence":
-          await this.executeSequence(parameter);
-          //recalc flow and power
-          this.updatePosition();
-          break;
-        case "execMovement":
-          await this.setpoint(parameter);
-          break;
-        case "flowMovement":
+
+        case "execsequence":
+          return await this.executeSequence(parameter);
+
+        case "execmovement":
+          return await this.setpoint(parameter);
+
+        case "entermaintenance":
+           
+          return await this.executeSequence(parameter);
+
+        
+        case "exitmaintenance":
+          return await this.executeSequence(parameter);
+
+        case "flowmovement":
           // Calculate the control value for a desired flow
           const pos = this.calcCtrl(parameter);
           // Move to the desired setpoint
-          await this.setpoint(pos);
-          break;
-        case "emergencyStop":
+          return await this.setpoint(pos);
+
+        case "emergencystop":
           this.logger.warn(`Emergency stop activated by '${source}'.`);
-          await this.executeSequence("emergencyStop");
-          break;
-        case "statusCheck":
+          return await this.executeSequence("emergencyStop");
+
+        case "statuscheck":
           this.logger.info(`Status Check: Mode = '${this.currentMode}', Source = '${source}'.`);
           break;
+
         default:
           this.logger.warn(`Action '${action}' is not implemented.`);
           break;
@@ -254,6 +271,13 @@ _callMeasurementHandler(measurementType, value, position, context) {
     } catch (error) {
       this.logger.error(`Error handling input: ${error}`);
     }
+
+  }
+
+  abortMovement(reason = "group override") {
+    if (this.state?.abortCurrentMovement) {
+      this.state.abortCurrentMovement(reason);
+    }
   }
 
   setMode(newMode) {
@@ -294,6 +318,9 @@ _callMeasurementHandler(measurementType, value, position, context) {
         break; // Exit sequence execution on error
       }
     }
+
+    //recalc flow and power
+    this.updatePosition();
   }
 
   async setpoint(setpoint) {
@@ -319,13 +346,14 @@ _callMeasurementHandler(measurementType, value, position, context) {
     if(this.hasCurve) {
       if (!this._isOperationalState()) {
         this.measurements.type("flow").variant("predicted").position("downstream").value(0);
+        this.measurements.type("flow").variant("predicted").position("atEquipment").value(0);
         this.logger.debug(`Machine is not operational. Setting predicted flow to 0.`);
         return 0;
       }
 
-      //this.predictFlow.currentX = x; Decrepated
       const cFlow = this.predictFlow.y(x);
       this.measurements.type("flow").variant("predicted").position("downstream").value(cFlow);
+      this.measurements.type("flow").variant("predicted").position("atEquipment").value(cFlow);
       //this.logger.debug(`Calculated flow: ${cFlow} for pressure: ${this.getMeasuredPressure()} and position: ${x}`);
       return cFlow;
     }
@@ -333,6 +361,7 @@ _callMeasurementHandler(measurementType, value, position, context) {
     // If no curve data is available, log a warning and return 0
     this.logger.warn(`No curve data available for flow calculation. Returning 0.`);
     this.measurements.type("flow").variant("predicted").position("downstream").value(0);
+    this.measurements.type("flow").variant("predicted").position("atEquipment").value(0);
     return 0;
     
   }
@@ -341,20 +370,20 @@ _callMeasurementHandler(measurementType, value, position, context) {
   calcPower(x) {
     if(this.hasCurve) {
       if (!this._isOperationalState()) {
-        this.measurements.type("power").variant("predicted").position('upstream').value(0);
+        this.measurements.type("power").variant("predicted").position('atEquipment').value(0);
         this.logger.debug(`Machine is not operational. Setting predicted power to 0.`);
         return 0;
       }
     
       //this.predictPower.currentX = x; Decrepated
       const cPower = this.predictPower.y(x);
-      this.measurements.type("power").variant("predicted").position('upstream').value(cPower);
+      this.measurements.type("power").variant("predicted").position('atEquipment').value(cPower);
       //this.logger.debug(`Calculated power: ${cPower} for pressure: ${this.getMeasuredPressure()} and position: ${x}`);
       return cPower;
     }
     // If no curve data is available, log a warning and return 0
     this.logger.warn(`No curve data available for power calculation. Returning 0.`);
-    this.measurements.type("power").variant("predicted").position('upstream').value(0);
+    this.measurements.type("power").variant("predicted").position('atEquipment').value(0);
     return 0;
 
   }
@@ -372,7 +401,7 @@ _callMeasurementHandler(measurementType, value, position, context) {
     
     // If no curve data is available, log a warning and return 0
     this.logger.warn(`No curve data available for power calculation. Returning 0.`);
-    this.measurements.type("power").variant("predicted").position('upstream').value(0);
+    this.measurements.type("power").variant("predicted").position('atEquipment').value(0);
     return 0;
 
   }
@@ -382,14 +411,14 @@ _callMeasurementHandler(measurementType, value, position, context) {
     if(this.hasCurve) {
       this.predictCtrl.currentX = x;
       const cCtrl = this.predictCtrl.y(x);
-      this.measurements.type("ctrl").variant("predicted").position('upstream').value(cCtrl);
+      this.measurements.type("ctrl").variant("predicted").position('atEquipment').value(cCtrl);
       //this.logger.debug(`Calculated ctrl: ${cCtrl} for pressure: ${this.getMeasuredPressure()} and position: ${x}`);
       return cCtrl;
     }
     
     // If no curve data is available, log a warning and return 0
     this.logger.warn(`No curve data available for control calculation. Returning 0.`);
-    this.measurements.type("ctrl").variant("predicted").position('upstream').value(0);
+    this.measurements.type("ctrl").variant("predicted").position('atEquipment').value(0);
     return 0;
 
   }
@@ -397,10 +426,15 @@ _callMeasurementHandler(measurementType, value, position, context) {
   // returns the best available pressure measurement to use in the prediction calculation
   // this will be either the differential pressure, downstream or upstream pressure
   getMeasuredPressure() {
-    const pressureDiff = this.measurements.type('pressure').variant('measured').difference();
+    if(this.hasCurve === false){
+      this.logger.error(`No valid curve available to calculate prediction using last known pressure`);
+      return 0;
+    }
     
+    const pressureDiff = this.measurements.type('pressure').variant('measured').difference();
+
     // Both upstream & downstream => differential
-    if (pressureDiff != null) {
+    if (pressureDiff) {
       this.logger.debug(`Pressure differential: ${pressureDiff.value}`);
       this.predictFlow.fDimension = pressureDiff.value;
       this.predictPower.fDimension = pressureDiff.value;
@@ -420,7 +454,7 @@ _callMeasurementHandler(measurementType, value, position, context) {
 
     // Only downstream => use it, warn that it's partial
     if (downstreamPressure != null) {
-      this.logger.warn(`Using downstream pressure only for prediction: ${downstreamPressure} `);
+      this.logger.warn(`Using downstream pressure only for prediction: ${downstreamPressure} This is less acurate!!`);
       this.predictFlow.fDimension = downstreamPressure;
       this.predictPower.fDimension = downstreamPressure;
       this.predictCtrl.fDimension = downstreamPressure;
@@ -502,18 +536,12 @@ _callMeasurementHandler(measurementType, value, position, context) {
     }
   }
 
-  //  ENHANCED: Your existing handler but with rich context
+  // context handler for pressure updates
   updateMeasuredPressure(value, position, context = {}) {
-    //  Your existing operational check
-    if (!this._isOperationalState()) {
-      this.logger.warn(`Machine not operational, skipping pressure update from ${context.childName || 'unknown'}`);
-      return;
-    }
-
-    //  Enhanced logging with child context
+   
     this.logger.debug(`Pressure update: ${value} at ${position} from ${context.childName || 'child'} (${context.childId || 'unknown-id'})`);
     
-    //  Store in parent's measurement container (your existing logic)
+    //  Store in parent's measurement container 
     this.measurements.type("pressure").variant("measured").position(position).value(value, context.timestamp, context.unit);
 
     // Determine what kind of value to use as pressure (upstream , downstream or difference)
@@ -523,7 +551,7 @@ _callMeasurementHandler(measurementType, value, position, context) {
     this.logger.debug(`Using pressure: ${pressure} for calculations`);
   }
 
-  // NEW: Flow handler (following your pattern)
+  // NEW: Flow handler
   updateMeasuredFlow(value, position, context = {}) {
     if (!this._isOperationalState()) {
       this.logger.warn(`Machine not operational, skipping flow update from ${context.childName || 'unknown'}`);
@@ -537,6 +565,7 @@ _callMeasurementHandler(measurementType, value, position, context) {
     
     // Update predicted flow if you have prediction capability
     if (this.predictFlow) {
+      this.measurements.type("flow").variant("predicted").position("downstream").value(this.predictFlow.outputY || 0);
       this.measurements.type("flow").variant("predicted").position("atEquipment").value(this.predictFlow.outputY || 0);
     }
   }
@@ -544,11 +573,13 @@ _callMeasurementHandler(measurementType, value, position, context) {
   // Helper method for operational state check
   _isOperationalState() {
     const state = this.state.getCurrentState();
+    this.logger.debug(`Checking operational state ${this.state.getCurrentState()} ? ${["operational", "accelerating", "decelerating"].includes(state)}`);
     return ["operational", "accelerating", "decelerating"].includes(state);
   }
 
   //what is the internal functions that need updating when something changes that has influence on this.
   updatePosition() {
+    
     if (this._isOperationalState()) {
 
       const currentPosition = this.state.getCurrentPosition();
@@ -566,6 +597,9 @@ _callMeasurementHandler(measurementType, value, position, context) {
       this.calcDistanceBEP(efficiency,cog,minEfficiency);
 
     }
+
+    
+
   }
 
   calcDistanceFromPeak(currentEfficiency,peakEfficiency){
@@ -596,7 +630,6 @@ _callMeasurementHandler(measurementType, value, position, context) {
     };
   }
 
-
    // Calculate the center of gravity for current pressure
   calcCog() {
 
@@ -656,16 +689,37 @@ _callMeasurementHandler(measurementType, value, position, context) {
     return { cPower, cFlow };
   }
 
-  calcEfficiency(power, flow, variant) {
+  calcEfficiency(power,flow,variant) {
+
+    const pressureDiff = this.measurements.type('pressure').variant('measured').difference('Pa');
+    const g = gravity.getStandardGravity();
+    const temp = this.measurements.type('temperature').variant('measured').position('atEquipment').getCurrentValue('K');
+    const atmPressure = this.measurements.type('atmPressure').variant('measured').position('atEquipment').getCurrentValue('Pa');    
+    const rho = coolprop.PropsSI('D', 'T', temp, 'P', atmPressure, 'WasteWater');
+    
+
+    this.logger.debug(`temp: ${temp} atmPressure : ${atmPressure} rho : ${rho} pressureDiff: ${pressureDiff?.value || 0}`);
+    const flowM3s = this.measurements.type('flow').variant('predicted').position('atEquipment').getCurrentValue('m3/s');
+    const powerWatt = this.measurements.type('power').variant('predicted').position('atEquipment').getCurrentValue('W');
+    this.logger.debug(`Flow : ${flowM3s} power: ${powerWatt}`);
 
     if (power != 0 && flow != 0) {
-      // Calculate efficiency after measurements update
-      this.measurements.type("efficiency").variant(variant).position('downstream').value((flow / power));
-    } else {
-      this.measurements.type("efficiency").variant(variant).position('downstream').value(null);
-    }
+      const specificFlow = flow / power;
+      const specificEnergyConsumption = power / flow;
 
-    return this.measurements.type("efficiency").variant(variant).position('downstream').getCurrentValue();
+      this.measurements.type("efficiency").variant(variant).position('atEquipment').value(specificFlow);
+      this.measurements.type("specificEnergyConsumption").variant(variant).position('atEquipment').value(specificEnergyConsumption);
+    
+      if(pressureDiff?.value != null && flowM3s != null && powerWatt != null){
+        const meterPerBar = pressureDiff.value / rho * g;
+        const nHydraulicEfficiency = rho * g * flowM3s * (pressureDiff.value * meterPerBar ) / powerWatt;
+        this.measurements.type("nHydraulicEfficiency").variant(variant).position('atEquipment').value(nHydraulicEfficiency);
+      }
+    
+    } 
+
+    //change this to nhydrefficiency ? 
+    return this.measurements.type("efficiency").variant(variant).position('atEquipment').getCurrentValue();
 
   }
 
@@ -712,23 +766,12 @@ _callMeasurementHandler(measurementType, value, position, context) {
 
     // Improved output object generation
     const output = {};
-    //build the output object
-    this.measurements.getTypes().forEach(type => {
-      this.measurements.getVariants(type).forEach(variant => {
 
-        const downstreamVal = this.measurements.type(type).variant(variant).position("downstream").getCurrentValue();
-        const upstreamVal = this.measurements.type(type).variant(variant).position("upstream").getCurrentValue();
-
-        if (downstreamVal != null) {
-          output[`downstream_${variant}_${type}`] = downstreamVal;
-        }
-        if (upstreamVal != null) {
-          output[`upstream_${variant}_${type}`] = upstreamVal;
-        }
-        if (downstreamVal != null && upstreamVal != null) {
-          const diffVal = this.measurements.type(type).variant(variant).difference().value;
-          output[`differential_${variant}_${type}`] = diffVal;
-        }
+    Object.entries(this.measurements.measurements).forEach(([type, variants]) => {
+      Object.entries(variants).forEach(([variant, positions]) => {
+        Object.entries(positions).forEach(([position, measurement]) => {
+          output[`${type}.${variant}.${position}`] = measurement.getCurrentValue();
+        });
       });
     });
 
@@ -741,6 +784,7 @@ _callMeasurementHandler(measurementType, value, position, context) {
     output["cog"] = this.cog; // flow / power efficiency
     output["NCog"] = this.NCog; // normalized cog
     output["NCogPercent"] = Math.round(this.NCog * 100 * 100) / 100 ;
+    output["maintenanceTime"] = this.state.getMaintenanceTimeHours();
 
     if(this.flowDrift != null){
       const flowDrift = this.flowDrift;
@@ -764,8 +808,8 @@ _callMeasurementHandler(measurementType, value, position, context) {
 module.exports = Machine;
 
 /*-------------------               Testing               -------------------*/
-/*
 
+/*
 curve = require('C:/Users/zn375/.node-red/public/fallbackData.json');
 
 //import a child