Monitor engine data
Use Data Monitor to view live engine parameters and record how they change over time. This helps you investigate engine behavior and save data for later analysis.
Expected result
Selected engine parameters are displayed live and can be recorded or visualized for analysis.
Understanding Data Monitor
Data Monitor displays live parameter values from the connected ECM. Use the values to observe engine behavior while investigating a concern.
- Monitoring: View current parameter values as they update during the session.
- Recording: Save monitored values over time so you can review the captured data after the session.
- Parameter groups: Select a predefined group or create a custom group to focus on parameters related to the behavior you are investigating.
The sampling rate controls how often parameter values are updated. Choose it with the connection limits described below in mind. Follow the separate DTK Mobile steps when changing the sampling rate.
Training video
GDTK Windows Demo DML
Watch on YouTubeWindows procedure
From the ECM Device Dashboard, select Data Monitor to open Data Monitoring. Use this screen to monitor and record parameters.
Parameters are organized into predefined groups. Select a group based on the vehicle behavior you are investigating. Select Monitor to monitor all parameters while the ECM is running.
Create a custom group in DTK Windows
Use a custom group to focus monitoring on the parameters you need for the concern you are investigating.
- From Data Monitor, select Custom Groups.
- Select New group to open Create New Group.
- Enter a name in Parameter Group Name.
- Select the checkbox beside each parameter you want to include in the group.
- Select Save to save the group, or select Monitor to go directly to monitoring the selected parameters. Monitor does not save the group.
Monitoring
- Select the Monitoring, Recording, or Stop button to open the Data Monitoring control screen.
- To change the sampling rate or end time, select the sampling rate and end time button at the bottom right of the screen.
- Select Record to start recording data.
- Select the visualization button to open graphical monitoring, described below.
Connection note: Attempting real-time monitoring can cause connection issues. Keep this in mind when choosing the sampling rate.
Recording
Record data when you need to review how parameter values changed during the concern. The saved recording provides a record of the monitored values over time for later analysis.
Select Record to save monitored data as a CSV file. While recording, each time you select Pause or leave the Data Monitor (DML) screen, a recording file is created and stored in:
C:\Users\Public\Documents\Cummins\Guidanz\Exports
Graphical monitoring
Graph selected parameters to see trends and compare how their values change during monitoring.
Select Visualize Data to create a graphical representation of numerical and enumeration-type parameters. Select the parameters you want to graph, then use these controls:
- Stop auto-scrolling: Left-click in the graph.
- Resume auto-scrolling: Double-click in the graph while auto-scrolling is stopped.
- Add an annotation: Right-click a point on the graph.
- Group graphs with the same units: Select Grouped.
- Separate graphs with the same units: Select Separate.
DTK Mobile differences
Open Data Monitor
From the ECM Device Dashboard, select Data Monitor to open Data Monitoring. Select a predefined parameter group based on the vehicle behavior you are investigating, or select Monitor to monitor all parameters while the ECM is running.
Monitoring and sampling settings
- Select the Monitoring, Recording, or Stop button to open the Data Monitoring control screen.
- To change the sampling rate, stop the monitoring session first. Then select the sampling rate and end time button at the bottom right of the screen.
- Select Record to begin recording parameters.
Recording
Select the green button to open the Data Monitoring control screen. Use this screen to start or pause (stop) DML and change the time settings. Select Record to record the parameters.
While recording, each time you select Pause or leave the DML screen, a recording file is created and stored. Access the recording in the event folder for that connection. See File and storage locations.
Create a custom group
Use a custom group to monitor selected parameters from different predefined groups. This lets you focus on the parameters you need without monitoring the entire Monitor group and using adapter bandwidth for additional parameters.
- From the Data Monitor page, select the manage groups icon.
- Select New Group.
- From the list of available ECM parameters, select the parameters you want to monitor.
- Enter a group name in the top-left text box, then save the group.
Once saved, the custom group can be reused on subsequent connections, including connections to other engines. Parameters that are not available in the currently connected engine's calibration will not be displayed.