The session time for the vCAC 6.0 console is set time timeout after 30 minutes. Depending on your security needs, it may be helpful to decrease, increase or disable the session timeout.
You will need to modify a file on the vCAC 6.0 virtual appliance - DO THIS AT YOUR OWN RISK and please snapshot the VM or back up the file (or both, even better). This is not an official VMware supported modification.
The file you will need to edit:
The section you will need to edit:
As you can see, the default value is in the session-timeout section and set at 30 minutes. If you wish to disable the timeout altogether, just use -1 for the value there.
Restart your vCAC appliance to effect the change.