DA Groups

The DA Groups category provides status information about the DA Groups to which a client subscribes. Each DA Group consists of items that the client is being used to monitor, for example, values on a Mimic.

The method used to subscribe to an DA Group varies according to the client application. For ViewX, there is an DA Group per Mimic, so a Mimic that contains an embedded Mimic will subscribe to 2 DA Groups.

The status information for the DA Groups is categorized under these headings:

• Id—Indicates the identity number of the group. This number is generated by Geo SCADA Expert and is in hexadecimal.
• Name—Indicates the name that has been allocated to the group. This includes the name of the System.
• State—Indicates the number of clients that can access the group. The State entry can be:
  • Private—The group can be accessed by one client.
  • Public—The group can be accessed by every client.
    
• Total Clients—Indicates the number of clients that are connected to the group.
• Active Clients—Indicates whether the server sends group data to the client when the group data changes. The Active Clients entry can be:
  • 0—The server does not send updated group data to the clients.
  • n—The server sends updated group data to the clients (from 1 to n, where n is the total number of clients).
    
• Def Rate—Indicates the update rate at which the server sends the group data to the client. The Def Rate is in milliseconds.
• Def Handle—Displays a client handle value. This is unique to the client and is generated by the client.
• Def LCID—Displays the locale identity. This number corresponds to the locale as defined in the client's regional settings. For more information, please refer to your operating system documentation.
• Def Bias—Indicates the amount of time that is added to, or subtracted from Coordinated Universal Time (UTC) to calculate the local time for the OPC DA client.

  The Def Bias is indicated in minutes.

• Def DBand—The default deadband. This is a percentage from 0.0 to 100.0.