Use Case:  Periodic Set Air Conditioning Reference Temperature

Description:  Set periodically the AC Reference Temperature
This UC is triggered periodically by a TRS timer (typ. every hour) and sets the reference temperature in the enclosure to the predicted value provided by ASM

Role(s)/Actor(s): 
Secondary: AC,TRS,ASM

Priority: Desirable. This function can always be performed manually via Set Air Conditioning Reference Temperature

Performance: TBD

Frequency: Periodically while AC is active.

Package Assignment:  Air Conditioning System.

Preconditions: 

• AC is active
• TRS timer is active
• ASM prevision data is available

Basic Course: 

• Trigger from TRS timer
• ATCS determines Reference Temperature Tref
  Postcondition: Tref is computed as a function of ASM predictions
• ATCS Sets Air Conditioning Reference Temperature
  Exception Course: Command failed
  Postcondition: Tref set
• ATCS schedules timer for auto Tref setting
  Exception Course: Command failed
  Postcondition: Timer is running
• ATCS returns OK reply

Exception Course: Command failed

• ATCS returns ERROR reply

Postconditions: 

• The Thermal subsystem is regulating the enclosure temperature at the reference Tref

Issues to be Determined or Resolved:  The function Tref = f(ASM prevision data) shall be defined

Notes:

Last modified: Tue Oct 29 15:37:33 UTC 2002