User Rights and Privileges

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A User Right is a permission allowing a user to do an action on Fernhill SCADA. Most User Rights apply to tags, for example Read or Write. Some other User Rights apply to Fernhill SCADA as a whole, for example Configure.

You can grant a User Right to a single zone, multiple zones, or all zones. You can also block a feature by removing the corresponding right from all zones.

Assigning User Rights

Supported User Rights

These User Rights are supported:

User Right Applies To Description
Refresh Refresh
Permits a user to manually refresh data from its data source
Write WriteValue
Permits a user to write data to a tag, or to the underlying data source
Force ForceValue
Permits a user to apply a force to a tag, or remove a force from a tag
Acknowledge AcknowledgeAlarms Permits a user to acknowledge an alarm
DisableAlarm DisableAlarms
Permits a user to enable or disable an alarm
TuneAlarm AlarmPropertyOverride
Permits a user override properties of alarms. For example: Change an alarm limit from its configured value.
DirectWrite DirectWriteBit
Permits a user write directly to a data source.
WriteFile WriteFile
Permits a user to write a file to a DNP3 Outstation.
Configure Fernhill SCADA Permits a user to configure Fernhill SCADA

Testing the User Rights of a Tag

To test whether a user has an appropriate privilege to access a tag, read the value of the UserPrivileges property.

Further Information

Windows User Rights Editor

To learn how to set the rights of users accessing Fernhill SCADA running on Windows.

Editing User Rights on Linux and macOS

To learn how to set the rights of users accessing Fernhill SCADA running on Linux and macOS.

Fernhill SCADA Server

To learn more about the Fernhill SCADA Server.

Fernhill SCADA

To learn about the tools in Fernhill SCADA.

Configuration Tool

To learn about configuring Fernhill SCADA.


For the meaning of terms used in Fernhill SCADA.