Logging machine data in the Wear Counters data category (previously a separate app called Wear & Tear) is part of the overarching feature Historical data logging.

Data categories are a built-in part of historical data logging and provide a way to log data in an organized manner, as explained in Categorize machine data with data categories.

For frequently asked questions, see Categorized machine data FAQ.

• Preparation
• Add log items

Preparation

Before you can start logging data, you will need to make some preparations.

1. If you haven't already, start in Historical data logging.
   • Data categories are only a part of this overarching feature. The main article contains relevant information, like required license(s) and preliminary steps.
2. If you currently have tags configured, make sure to read the Categorized machine data FAQ before you proceed.

3. Set up an asset and link a device to that asset.

   Data loss

   Be aware that if you unlink the device from the asset, that will automatically and immediately delete all previously logged data for all categorized log items on the asset and all its sub-assets. This cannot be undone. Once a device has been linked again and a correct configuration has been pushed to the edge gateway, it will start logging new data.

   For an overview of all actions that result in loss of data, see Categorized machine data FAQ.

Add log items

To log machine data, you'll need to add log items. Add a log item for every variable that you want to log.

4. Go to Fleet Manager > Assets and click on your asset name.
5. In the asset tree, click on the (sub-)asset where you want to add log items.
   • If you have built an asset tree that represents your machine layout, it is recommended to organize your data per machine part or section. Select a (sub-)asset.
   • If you only have a single asset in your tree, simply select that asset.
6. Go to the Wear Counters tab.
7. Click onAdd item and enter the requested information (details below). If you are unable to see this option, your asset may be an instance of a library asset and will need to be edited in the asset library instead.

   Field	Description
   Name	Enter a name for the wear counter.
   Variable	Select the variable you want to track. Only variables with data type integer or float (real) are available for wear counters. If you are unable to see any variables, go to the General tab and make sure that your device is linked to your asset.
   Interval	This determines when data will be logged. Select a suitable option for your wear counter. The options "Every X time" will log a value at that time interval. The options "Up to X values per hour" do not log at a fixed time interval. Instead, only value changes are logged up to the selected option. Meaning if the wear counter does not change, no value will be logged. Any value changes that exceed the configuration will not be logged. Make sure to select an option with sufficient room.
   Retention policy	Enter how long you want to store your data in the cloud. Requires your license/module to remain active.
   Warning limit	(optional) The component will visually display when a wear counter has exceeded its warning limit. Useful as an early warning indicator.
   Upper limit	Enter the wear counter limit. The component will indicate when this limit is expected to be reached and is effectively reached. For more information, see Categorized machine data FAQ.
   Cycle start value	Counters do not always need to start at 0 or need to be reset to 0 whenever maintenance is performed. Continuous counters can also be used. Enter the counter value when the last maintenance was performed. That is the start value of the current maintenance cycle.
   Cycle start date	Enter the date when the last maintenance was performed. That is the start date of the current maintenance cycle.

8. Repeat the previous steps for each wear counter you'd like to track.
   • It is not possible to add wear counters in bulk. However, once you've added them all once, it's much easier to add them to another asset by using the asset library.

You have now made the changes in the IXON Cloud, but these are not yet active in your device. You will need to push your changes to your device for them to take effect.

9. Click on Push config to device in the top right corner.

From now on, data will be logged based on how you configured your wear counters. No initial value is logged. Meaning for wear counters that are configured to log on change, the next value change will be the first value that is logged.

10. Click below to continue in the feature specific article.
    • Historical data logging