System Tags

The [0] System group is a special tag group automatically created by Wise SCADA in every project and cannot be deleted. These tags host the system time of the computer running SCADA, the audio warning system, and current user session information.

Note: The values of tags in this group (except Beep) are automatically assigned by the system and cannot be changed by the user (Read-Only).

System Tags List

The table below explains the functions of standard system tags:

Symbol (Tag Name)	Data Type	Description and Usage Area
Beep	BOOL	System Sound: Used to emit a beep sound from the computer’s motherboard speaker (or system audio). • When this tag is set to True, the computer beeps once. • Usage: Typically used to provide audio feedback to the operator when an alarm occurs or a button is pressed.
EthernetLink	BOOL	Shows whether the computer’s (Ethernet) connection is active.
Now	DATETIME	Date and Time: Holds the computer’s current date and time information in full format (e.g., 22.10.2025 13:08:12). • Usage: Used to generate timestamps in reports or display the clock on the screen.
NowDate	DATE	Date: Holds only the current date information. Does not include time (e.g., 22.10.2025).
NowTime	TIME	Time: Holds only the current time information. Does not include the date (e.g., 13:08:12).
UserLevel	UINT	User Authority Level: Shows the authority degree (between 0 – 1000) of the active user currently logged into the system. • Usage: By binding this to the Visible property of a button or page, you can prevent users with low authority from seeing critical controls.
UserName	STRING	User Name: Holds the name of the active user logged into the system as text (e.g., “Admin”, “Operator1”). • Usage: Used to display a welcome message like “Welcome, Admin” on the main screen or to record who performed an action in the Event Log.

Tip: How to Use System Tags?

Displaying Time on Screen

1. Add a Label object to the screen.
2. Bind the Now tag to the Properties -> Text -> Tag property.
3. When SCADA runs, the date and time will update second by second.

Hiding Based on User

1. Bind the UserLevel tag to the Visible -> Tag property of a “Settings” button.
2. Write > 500 as the condition.
3. Operators with an authority level lower than 500 will not be able to see this button.