A Viewer Only mode, Read-Only or restricted access mode, is a way of controlling access from an Elipse E3 Viewer to a server (Domain), as opposed to a Viewer Control mode, which has no access restrictions.

By using user permission settings, on chapter Security, and according to the type of Elipse E3 Viewer license in use, on chapter Domains, a server then determines whether an Elipse E3 Viewer is in Control (normal) or Only (restricted) mode. When in Only mode, several restrictions apply to actions that can be written to a server. This mode blocks, by a script error or by generating an error message, the following items:

•General writings to server's object properties via Elipse E3 Viewer Links

•General writings to server's object properties via Elipse E3 Viewer scripts

•Viewer's SetValue and ToggleValue methods, including Load and Toggle Value Picks

•Calling server's object methods via Elipse E3 Viewer scripts (please check for exceptions further on this topic)

•User administration via Elipse E3 Viewer, by using Viewer's UserAdministration method

•Acknowledging alarms via E3Alarm

•Using Viewer's LoadFormulaDlg, LoadFormulaValues, and LoadFormulaValuesQuiet methods

The following items remain allowed in this mode:

•Reading server's object properties, via Links or scripts

•Calling methods considered non-restricted for server objects via Viewer scripts:

•Item (all objects)

•Refresh (OPC Group)

•FindUnit, FindValue, GetValueData, and GetUnitData (Formula)

•GetAlarm (Alarm Source)

•GetE3QueryFields, GetADORecordset, GetAsyncADORecordset, and CancelAsyncADORecordset (Query)

•GetObject (ServerApplication)

•Changes in the Advise status of server Tags

•Changing user's own password, by using Viewer's ChangePassword method