Use Case:  Get M2 Focus Position

Description:  Returns the current M2 Focus position in mm

Role(s)/Actor(s): 
Primary: Operation,Maintenance,VLTICS-ISS
Secondary: M2

Priority: Major

Performance:  1 second

Frequency: At any time

Package Assignment:  M2 Subsystem.

Preconditions: 

• M2 subsystem is online

Basic Course: 

• Send command GETFPOS to get M2 focus position
• ATCS retrieves current M2 focus position

  Interface:  IfM2.Focusing.GetAbs

  Exception course: M2 focus position retrieval failed
• ATCS returns current M2 focus position

Exception Course: M2 focus position retrieval failed

• ATCS returns ERROR reply

Postconditions: 

• M2 focus position returned

Issues to be Determined or Resolved: 

Notes:

Last modified: Thu Jun 28 13:28:38 UTC 2001