RobotWebServices read Robot power consumption

dfra

with the api described in

https://developercenter.robotstudio.com/api/rwsApi/rwsystem_get_system_energy.html

we are able to read "accumulated-energy" in json via HTTP GET /rw/system/energy?json=1

The questions are :

• What's the UM, Joule or others?
• Seems that the system update the published sample every 3600s, is possible reducing this time for example 10s?
  
• From manual "energy-state returns the energy state of the system such as blocked, paused, not-paused, resuming, pausing, going-to-sleep or sleep"
  What means these states?

Thanks