• Configure DI Redundancy

• Create two new instances of the $tAppEngine template.

• Name the new instances AppEngineDI1 and AppEngineDI2 and assign them to the ControlSystem area.
  

• In the Deployment view, host AppEngineDI1 on the GRPlatform platform and AppEngineDI2 on Platform_001 platform.
  

• Undeploy the InControl instance.
• Rename the InControl instance DIO1.
  
• Host the DIO1 object on the AppEngineDI1 engine.
  

• Use Lab 6, “Connecting to the Field” to create another device integration object, but name it DIO2 instead of InControl. Assign it to the ControlSystem area.
  

• In the Deployment view, host the DIO2 object on the AppEngineDI2 engine.

• Create a derived template from the $RedundantDIObject template named $tRedundantDIObject and assign it to the Training template toolset.

• Create an instance of the $tRedundantDIObject template named InControl and assign it to the ControlSystem area.

• Double-click the InControl instance to open its configuration editor.
• In the General tab, configure the object as follows:
• Primary DI source:         DIO1
• Backup DI source:         DIO2

• Select the Scan Group tab and click on the Copy Common Scan Groups button.

• In the Copy Common Scan Groups dialog box, click the OK button to accept tagname as the scan group for the new InControl object.
• Click on the Copy Attributes From Primary button.

• Click the Save and Close button and check in the object.
• In the Deployment view, host the new InControl object on the AppEngine engine.

• Test the Redundant DI Object

• Deploy the AppEngineDI1 object on cascade.
• Deploy the AppEngineDI2 object on cascade.
• Deploy the InControl object.
• Open Object Viewer by right-clicking the InControl instance and selecting View in Object Viewer. If you closed Object Viewer before, you can use File / Load Watch List to open the file you saved earlier.
• Right-click in the Watch List (bottom section of Object Viewer) and select Add Watch Window to add a new tab to the watch list.
• Right-click in the Watch List (bottom section of Object Viewer) and select Rename Tab to rename the watch list to RDIO.
• Add the following attributes from the InControl instance to the watch list:
• DISourcePrimary
• DISourceBackup
• DISourceActive
• DISourceStandby
• StatusPrimaryDISource
• StatusBackupDISource
• ConnectionStatus
• SwitchReason
• ForceFailoverCmd
• SwitchCnt
• Your data should look similar to the following:

• Save the watch list.
• Force a failover to the second device integration object by writing true to the ForceFailoverCmd attribute of the Redundant DI Object.