Add a data logger

Configure a data logger to log variable values in a database.
  1. From the toolbar, select
    Open dashboard page
    .
  2. In the editor, select
    Configure a data logger
    .
  3. Select
    New data loggers
    .
  4. (optional) In
    Name
    , enter the name for the data logger.
  5. In
    Sampling mode
    , select either:
    • None
      . Sample variables by invoking the Log method.
    • Periodic
       to sample all monitored variables and in
      Sampling period
      , set the interval in hours, with millisecond precision, between one sampling and the next.
    • Change in value
       to sample all monitored variables with values that changed from the previous sampling and in
      Polling time
      , set the interval in hours, with millisecond precision, between one sampling and the next.
    TIP:
    When you use a Data Logger that has the sampling time set to
    Change in value
     and configure
    Polling time
    , the tag is monitored at the specified rate. If the value changes in between two readings, a new record is added to the database.
    When one of the tags polled by the data logger is also used on other controls such as on the user interface,
    Polling time
     depends on the Dynamic Variable Polling Time property of the PresentationEngine, If there are multiple polling times, the fastest polling time is used.
  6. Select
    Next
    .
    The message
    The Data logger
    name
     successfully created
     appears.
  7. Select
    Next
    .
  8. If there is no database for the logger, create a database:
    TIP: You can also right-click an existing database and select
    Duplicate
    . Duplicating a database is useful if you want to create a database based on an existing database.
    1. Select
      New database
       and complete:
      • Name
        . A name for the database.
      • Type
        . Either
        Embedded
         or
        ODBC connection
        .
    2. Select
      Next
      .
    3. Set the database properties.
    4. Select
      Next
      .
  9. Select the database to store the logger data and select
    Next
    .
  10. Select the variables that you want to log and select
    Next
    .
    TIP: You can find variables by using the search field.
  11. Select
    Exit
    .
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