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i4scada Knowledge Base

i4scada Test Center Overview


Live monitoring and testing of the i4scada Signals in a user-friendly environment. Check out more details about the i4scada Test Center by opening this article.

i4scada Test Center allows the users to monitor and test the signals configured with i4scada Studio. The Test Center can be very helpful when testing web applications or new controls. The user can assign new values to signals, simulating changes of values.

The signals have to be writable in order to receive new values from the Test Center.

The software user interface consists of a menu bar and a display area, where the process values are presented in the form of a list.


Test center

Menu Bar

UI Option


Program/ Open

Open saved signal configuration

Program / Save

Save the current signal configuration. The currently loaded configuration is overwritten

Program / Save As

Saves the current configuration under a new name.

Program / Options

Opens a new dialogue for general program settings.

Program / Terminate

Terminates the i4scadaTest Center.

Signals / Add

Adds signals (process variables) or system variables

Signals / Remove

Removes an indicated process variable from the list.

Signals / Write

Opens a dialogue for the description of process variables.

Signals / Import

Allows the user to import signals by:

  • browsing the server

  • importing from a selected xml file

Signals / Validate

Opens a dialog in order to check that the selected signals are correct. In this way, verification is made as to whether the signals already exist in the database and whether the signals from the i4scada Server have also been initialized properly for communication.

Communication / Manage Servers

Opens a dialog in order to parametrize the configuration for local or remote i4scadaservers.

Help / About

Displays the i4scadaTest Center version number.


You can customize the way in which i4scadaTest Center works using the Options dialog.


Test center Options dialog

UI Option


Always on top

The program window always remains in the foreground.

Perform communication tests

When a signal is imported, a communication test is automatically conducted by the i4scada Server.

Remember last recent signal list at start-up

The current signal list will be automatically saved when the program shuts down and will be reloaded when the program is restarted.

Add and Remove signals

This option can be used to manually add signals to the signal list.


Test center Add Signal dialog

UI Option


Server name

Select the name of the i4scada Server.

Custom signal

Enter the process signal, which was manually installed in i4scadaStudio.

System signal

System-specific status signals to display the i4scada Server Status:

  • WFSInternal_AliveStatus = The status of the i4scada Server

  • WFSInternal_AliveTimeStamp = The time of the most recent signal update

  • WFAInternal_AliveStatus = The status of the i4scada AlarmManager

  • WFAInternal_AliveTimeStamp = The time of the most recent signal update

  • WFLInternal_AliveStatus = The status of the i4scada Logger

  • WFLInternal_AliveTimeStamp = The time of the most recent signal update

4 statuses can appear on AliveStatus messages.

  • Value = 10 -> The particular module is inactive.

  • Value = 12 -> The particular module is starting up.

  • Value = 13 -> The particular module has started up.

  • Value = 14 -> The particular module is shutting down.

Click on the Remove option and the signal that is selected in the list will be deleted.


The Write command opens a dialog that allows you to write a new value to the signal selected in the signal list.


Write signal values dialog

Alphanumeric values can be typed in the Real/String field. If the Boolean value option is selected and the box is ticked, the value 1 will be written. If the Boolean value option is selected, and the box isn’t ticked, the value 0 will be written.


If the security system is activated, a user and a password must be entered into the dialogue field, before you can write a value to the i4scada server.

Secure Write Operations

In order to write signal variables, if the security system is activated, you must enter a user who has the necessary write access and a password.


Secure Write operations dialog

The security system with a user and a password is configured using the i4scada User Manager.

UI Option



Write operations are performed using the user name and the password that were provided. No verification is carried out if the security system in the i4scada server is deactivated.

User Name

The user name that is used for write operations.


The password that is used for writing operations