Workstations

Switching host machines

There are a few times when you need to switch which machine is your database host machine in a DeltaV system. If the current host machine begins to fail (hardware failure) and is no longer dependably online, you must move the database to another machine. If you combine two or more previously separate DeltaV control networks, you need to make one workstation the host for the entire control network. There can only be one host machine on a network.

In order to become a host machine, a workstation must:

To change the host machine, you must take the database off of the current host and then configure and download the new host. You must follow the instructions in the order given below or you might corrupt the data and end up reinstalling the DeltaV software. The database will not function properly if corrupted.

Important

Read both sets of instructions (that is, those under "Current Host" and under "New host") before beginning the switch.

Current host

Follow these instructions for the machine that is currently your host machine. The current host machine is a ProfessionalPLUS workstation with Objectivity's Lock Server and the control database installed on it. If you are combining two networks, this is the machine that will no longer be the host.

Note

The control network must be off line while changing the host machine. No nodes can be accessing the database at this time.

  1. Export your database and any graphics specific to this control strategy. You can export to removable media or to a drive shared by both the current host and the new host.
  2. If you are keeping the current host machine on the control network (but not as the host), stop all of the DeltaV services. To do this, run Workstation Configuration on the current host and download it as type Other.

New host

The DeltaV host machine is always a ProfessionalPLUS machine with Objectivity's Lock Server and the control database installed on it.

Follow these instructions after completing the Current host instructions above. Designate which workstation will be the new host machine. Remember, the control network must be off line. No nodes can be accessing the host machine.

Note

If the new host is a machine of type Other or Application Station, uninstall and then reinstall the DeltaV software using the type ProfessionalPLUS.

  1. Create a new database using the Database Administrator Tools. Name it the same name as your exported database.
  2. Run Workstation Configuration on the new host machine.
  3. Refer to the Workstation Configuration instructions for more information on configuring a workstation.
  4. Set Host Machine using Database Administrator Tools to this new machine (using the machine name you just assigned in Workstation Configuration).
  5. Set the new database as the Active Database using the Database Administrator Tools.
  6. Run Synchronize Workstations in Database Administrator Tools. The control network is now on line.
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