Runtime Data Persistence and Startup Behavior
Wise SCADA manages data transitions between Development and Runtime modes based on specific rules.
Whether data changed during Runtime (Internal Tag values, Chat history, user settings, etc.) is preserved depends on how you launch the project.
1. Restarting Runtime (Data Preserved)
If data changed during Runtime (e.g., a set value changed from 50 to 100) and you close Runtime and open Runtime again directly:
- Behavior: The system remembers the values from the last Runtime session.
- Result: The project opens where it left off (with the Set value as 100) and with historical data (Chat history, etc.) intact.
2. Saving and Starting via Development (Data Reset)
If you open the Development editor, make a change to the project, Save, and then start Runtime:
- Behavior: The system accepts the “Default Values” in the Development environment as the new starting point.
- Result: Temporary data generated in the previous Runtime session (Chat history, instantaneously changed Internal Tag values) is deleted. The project starts with the settings defined in the Development environment.
Critical Warning: Risk of Data Loss
When you perform a “Save” operation in the Development environment, the current state of the project becomes the “Master Copy”.
Example Scenario:
- Operators exchanged important messages in the Chat window during Runtime.
- You opened Development, moved a button to the right, and Saved.
- When you switch back to Runtime, that Chat history will be deleted.
Therefore: When developing and saving on a project running on a live system, please consider that temporary data on the Runtime side will be reset.