How to
Configuring a Meter Trend Log
You configure the properties of a meter trend log to meet the unique needs of your site.
The meter trend log is a variable triggered trend log with extra functionality to seamlessly handle consumption calculations independent of meter rollover or meter exchange.
For more information, see Variable Triggered Trend Logs .
You create and configure meter trend logs using WorkStation.
For example, in the figure below, the meter trend log records a meter the 1st of every month. In the middle of February the meter rolls over to 00000. A chart with meter consumption calculation prints the consumption every month.
Meter trend log
When physically replacing an old meter with a new one, you have to configure the meter trend log by adding the settings of the old meter and new meter in the Manage replacement of meter dialog box in WorkStation. These settings are the foundation to handle a meter rollover or calculating consumption though meter replacement. For more information, see Manage Replacement of Meter Dialog Box .
Manage replacement of meter dialog box where you enter the values of the new and old meter.
In order for a meter rollover to be managed correctly in the meter trend log and to ensure logging starts at the correct energy reading value, you enter previous meter and new meter information in the Manage replacement of meter dialog box. For more information, see Managing Replacement of a Meter .
In WorkStation, in the System Tree pane, click the meter trend log you want to configure.
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Edit the properties:
Table: Meter Trend Log Properties
Component
Description
Status
Displays the status of the trend log.
Enabled
Displays True if the trend log is enabled.
Logged variable
Enter the variable that you want to log.
Delta
Select the minimum value change that triggers a new record.
Trigger variable
Enter the variable that triggers the trend log to start recording.
Trigger condition
Select when you want the variable recorded: when trigger variable changes to true, changes to false, or all changes. For more information, see Variable Triggered Trend Logs .
Log size
Select the number of records to store before old records are overwritten including internal records generated by the trend.
For more information, see Log Record Storage .
Clear when enabled
Select True to clear the trend log when it is enabled.
Click the Save button
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Meter Trend Logs
Meter Trend Log Properties
Configure Dialog Box – Configuration Tab
Configure Dialog Box – Operation Tab
Variable Triggered Trend Logs
Log Record Storage
Trend Log Does Not Start Record Due to the Start Condition
Missing Trend Log Records