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AVEVA Enterprise SCADA

<DriverType Type="BLT">

  • Last UpdatedFeb 10, 2026
  • 1 minute read

The <DriverType Type="BLT"> may contain the following elements:

  • <DriverProperty Name="HostName">

    • This specifies a default hostname for Business Logic Tier (BLT) calls to this alias.

    • If the virtual hostname needs to be defined, then use the %VirtualHost(servicename)% macro explained in Macros.

  • <DriverProperty Name="NumOfThreads">

    • This will create a given number of threads. If this property is not specified, then the driver will create only one thread.

  • <DriverProperty Name="RequestTimeOutMS">

    • This is the timeout used to send the Data Access Layer (DAL) message from the client to the driver.

    • A value of zero (default) means infinite timeout.

  • <DriverProperty Name="LocaleID">

    • This can be a specific value (for example, en-US), hex value, or it can be set to %LocaleID% macro, which will be expanded based on your localeID.

    • The value of %LocaleID% will be passed from user.

  • <DriverProperty Name="ExecutionTimeOutMS">

    • The time in milliseconds to wait for a response to the request before a timeout notification is issued by the Data Access Layer (DAL).

    • There is no infinite value.

    • The client is set it to 10000 milliseconds by default.

  • <DriverProperty Name="ConnectionManagerPortNumber">

    • This is the port number for the BLT client connection manager.

  • <DriverProperty Name="ConnectionManagerMaxBufferSize">

    • This is the maximum buffer size for the BLT client connection manager.

  • <DriverProperty Name="ConnectionManagerMaxConnections">

    • This is the maximum numbers of connections for the BLT client connection manager.

  • <DriverProperty Name="TablePollMultiplier">

    • This number acts as a multiplier for the poll periodicity property for the RealTime Table Summary Control (DNARTTable).

    • It can be used to slow down polling rates of summary displays when running remotely over slow network connections.

    • The default value is 1.