Use Case:  Center M6

Description:  This action sends the mirror M6 back to its center position.

Role(s)/Actor(s): 
Primary: Operator, Maintenance
Secondary: M6

Priority: Critical

Performance: TBD

Frequency: At every preset to a new target.

Package Assignment:  M6 Subsystem.

Preconditions: 

• M6 is ONLINE

Basic Course: 

• Send command MOVECE to center M6 to the configured tilt angles (in OLDB)
  Exception Course: Command failed
• ATCS sends center command to M6 sub-system

  Interface:  IfM6.Centering.Center

  Exception Course: Command failed
• ATCS returns OK reply

Exception Course: Command failed

• ATCS returns ERROR reply

Postconditions: 

• M6 at Center position as configured in DB

Issues to be Determined or Resolved: 

Notes: At INIT time, the mirror M6 is tilted to the angles configured in the OLDB (in arcsecs).

Last modified: Fri Nov 23 12:20:53 UTC 2001