Howto #03
Problem: mechnical device has stopped with error.

    Diagnostic :
  • PMAS Status Window: a mechanical device does not reach a valid end position.
    The corresponding error flag switches to RED.

    Explanation :
  • The error condition is a complex function of VME motor controller parameters. It could be as simple as the timeout of a somewhat worn-out gear, requiring a longer positioning period than foreseen originally. On the other hand, it could be a serious mechanical or electronic failure, which might potentially cause a catastrophic failure of some sort (collision of mechanical stages, limit switch overrun, etc.

    Solution :
  • Reset and re-initialize the affected component.
    Note: ONLY TO BE DONE BY CAHA STAFF
  • On rike xterm, type (e.g. for collimator focus motor) :
    rike:colReset
    rike:colInit
    
    Verify, that error condition has been solved:
    rike:colStatus
    
    
  • Reset/Init scripts are available for the following devices :
    Spectrograph Collimator Focus :
      colReset 
      colInit  
      colStatus
    Spectrograph Camera Focus :
      camReset
      camInit
      camStatus
    Grating Rotator :
      grotReset
      grotInit
      grotStatus
    Field Optics :
      foReset
      foInit
      foStatus
    A&G Camera and Calibration Unit exchange mechanism :
      tmtopReset
      tmtopInit
      tmtopStatus
    A&G Camera Filter exchange mechanism:
      agfilReset
      agfilInit
      agfilStatus
    A&G Camera Focus :
      agfocReset
      agfocInit
      agfocStatus
  • If an error persists despite reset, try :
  •  limevalSet
    immediately following the reset command.

page created 24/08/2004 (mmr)