System Architecture and System Limits

The following diagram shows the architecture for the Web Service Interface API.

NOTE:
Wake-up push notifications are part of a future extension module.

System Limits

The following limits apply when using the Web Service Interface:

• Number of concurrent sessions: 100
• Delay for notifications: <1 second
• 5’000’000 value updates / day
• 20’000 value subscriptions
• 250’000 event notifications / day
• 250’000 event-counter notifications / day
• 1’000’000 trends / min

NOTE:
The Client versions of Windows (for example, Windows 11) have intentionally feature-limited versions of IIS. One limitation is the number of concurrent connections which can be as low as 10.This especially affects the usage of push notifications with SignalRen.