My DataMiner is configured to disconnect inactive client connections after 1 hour. However, I noticed if I open an element card, the connection stays open for days (even if the client is inactive). I saw the connection was sending a lot of SPI requests/responses. This leads me to believe the SPI's are keeping the connection active while they probably shouldn't be. I don't see this behavior when the client does not have an element card open.
Now I also wonder if it's useful to generate SPI's when the DMS is not cloud-connected, since the SPI's are not stored on disk as far as I know? Are there any reasons for generating SPI's while the system is not cloud-connected?
The auto-logoff setting of Cube ("Time before automatic disconnect") is based solely on keyboard and mouse input to the Cube window(s). Sending and receiving of DataMiner messages has no impact on this.
SPIs are generated regardless of cloud connectivity and can be used to investigate issues. Although they are not stored on disk, an administrator can inspect these in realtime using the SLNetClientTest tool (Diagnostics > SPI).