Collaboration Case: Axis Position Control

Description: Control position of trackig axis.

Performance:  Highest priority

Frequency:  10ms-1sec (depending on axis)

Package Assignment:  Tracking Axis Subsystem.

Preconditions:

• Axis is ONLINE

Basic Course:

• Send new reference position as final setpoint angles
  Exception Course: Command failed
• Convert reference position to axis coordinates (units) for Translation Stage
  Exception Course: Conversion failed
• Apply axis coordinates to move the axes
  

  Interface:  IfAltDrive IfAzDrive Probe

  Exception Course: Move failed
• Return OK reply

Exception Course: Command failed

• Return Error reply

Exception Course: Conversion failed

• Return Error reply

Exception Course: Move failed

• Stop axis
• Return Error reply

Postconditions:

• Axis position updated to new reference position.

Issues to be Determined or Resolved:

Notes:
see axis and trk module description

Last modified: Thu Jun 28 14:02:29 UTC 2001