Use Case:  Relay Optics Structure Shutter Status

Description:  Retrieve the Status of the Relay Optics Structure shutter

Role(s)/Actor(s): 
Primary: Operator, Maintenance, VLTI-ISS
Secondary: ROS Shutter

Priority: Major

Performance: TBD

Frequency: At any time.

Package Assignment:  Relay Optics Shutter Subsystem.

Preconditions: 

• ROS Shutter is available and STANDBY or ONLINE

Basic Course: 

• Send command STATUS to retrieve the ROS Shutter status
  Exception Course: Command failed
• ATCS sends the command to the ROS Shutter:
  

  Interface:  IfRosShutter.Status

  Exception Course: Command failed
• ATCS returns shutter status

Exception Course: Command failed

• ATCS returns ERROR reply

Postconditions: 

Issues to be Determined or Resolved: 

Notes:

Last modified: Tue Nov 27 11:14:19 UTC 2001