What does the Cockpit panel "Latency" mean?


I read the operators manuals,but i was confused by the “Latency”.

the operator manual says “Latency”(this will show +999 if there is a problem);so what does the time “16ms” mean?who can explain it in details?


The latency in the timing for round trip communication from the browser to the node process running on the beaglebone and back again.