var instance = new Vintasoft.Twain.WebTwainDeviceManagerInitSettingsJS();

var value; // Type: number
value = instance.get_AllowableSessionInactivityTime();

function get_AllowableSessionInactivityTime() : number;

An interval, in milliseconds, during which the device manager must refresh its session. Default value is 60000 milliseconds (1 minute). Minimum value is 100, maximum value is 3600000.