The current status periods according to your documentation are...
The device status color dot depends on the time the device sent its status.
Green - online, less than 2 hours
Yellow - warning, 2-4 hours
Red - offline, more than 4 hours
Is there away to change this to a smaller interval when using MQTT?
Something like it is green while receiving 1 minute pings, then if it is missed twice the colour is yellow, and after 5mins of missing pings it goes Red.