Use Case:  Stop Chopping

Description:  Stops chopping on mirror M6

Role(s)/Actor(s): 
Primary: VLTICS-ISS, Maintenance
Secondary: TRS

Priority:  Major

Performance:  1 second

Frequency:  At any time

Package Assignment:  Chopping.

Preconditions: 

• ATCS is ONLINE
• Chopping is active

Basic Course: 

• Send command to stop chopping
  Exception course: Command failed
• ATCS waits Chopping phase is ON
• ATCS cancels the TRS timer associated to the Chopping loop
  Postcondition: Chopping Loop is Idle in ON phase
  Exception course: Command failed
• ATCS return OK reply

Exception Course: Command failed

• ATCS returns ERROR reply

Postconditions: 

• Chopping inactive

Issues to be Determined or Resolved: 

Notes:

Last modified: Thu Jun 28 13:08:44 UTC 2001