Configure the Computer Role Page

Server and Control Client

This computer will be a standalone or networked I/O server and Control Client. This option is disabled if this computer has no Server components assigned to it to run. Selecting this option enables the Multi-Process check box.

Select the Multi-Process check box to separate your client and server components into individual processes. This option can be used for distributing the components across multiple CPUs.

If the Multi-Process check box is selected the [General]Multiprocess parameter in the Citect.ini file is saved with the value 1. If not selected, the parameter is saved with the value 0.

If you leave the Multi-Process check box unselected, Plant SCADA will run the client and server components in one process.

Note: Running Plant SCADA as a service in single process mode is not recommended. If you run Plant SCADA in this condition, the following limitations will apply:

• Hardware alarms originating from the server process will not appear.

• The following Cicode functions will not be executed within the server process:

  • AlarmSumAppend

  • AlarmSumCommit

  • AlarmSumDelete

  • AlarmSumFind

  • AlarmSumFindExact

  • AlarmSumFirst

  • AlarmSumGet

  • AlarmSumLast

  • AlarmSumNext

  • AlarmSumPrev

  • AlarmSumSet

  • AlarmSumSplit

  • AlarmSumType

  • DriverInfo

  • IODeviceControl

  • IODeviceInfo

  • SPCAlarms

  • ServerInfoEx

  • TrnAddHistory

  • TrnDelHistory

Control Client

This computer will only be a Control Client. This option is disabled if the computer has been assigned a server component to run.

Selecting this option enables the Full License check box.

Note: The Full License checkbox is only available when running the Setup Wizard in Custom Mode.

Select the full server license check box if you want this Control Client to use a full (server) license, as opposed to a client license. This sets the [Client]FullLicense parameter in the Citect.ini file to 1 (the default value is 0).

Generally, you would not allocate a full server license to a client as there is no difference in functionality between the two licenses. Allocate a full server license if you have insufficient client licenses available, or for some other specific need.

View-only Client

This computer will be a view-only client. This read only option is disabled if this computer has been assigned a Server component to run.

HMI (Standalone, no networking)

This computer will run as a standalone HMI setup with networking disabled. Select this option for any computers that require a dedicated HMI license from an Enterprise License Server that hosts multiple license types.

If you are using Sentinel licensing, you can use a key that has networking disabled. If a full Sentinel key is plugged in, runtime will start in standalone mode with networking disabled.

Select the Multi-Process check box to separate your client and server components into individual processes. This option can be used for distributing the components across multiple CPUs.

If the Multi-Process check box is selected the [General]Multiprocess parameter in the Citect.ini file is saved with the value 1. If not selected, the parameter is saved with the value 0.