RE: Pro-Dex OMS MAXv card reading limit-switches

["Mark Rivers" <rivers@cars.uchicago.edu>]

If you set your switches so that they both indicate a limit, what happens if you try to move in the plus direction?  Does the motor move?  Similarly, if you try to move in the minus direction, does the motor move?  It should not move in either direction.  If you try to move in the positive direction the HLS PV should be 1, and if you try to move in the minus direction LLS should be 1.  If it moves in either direction then either your wiring is incorrect or the board is broken.
 
Mark
 

________________________________

From: tech-talk-bounces@aps.anl.gov on behalf of junkes
Sent: Thu 5/12/2011 7:15 AM
To: tech-talk@aps.anl.gov
Subject: Pro-Dex OMS MAXv card reading limit-switches




 Using OMS MAXv-card i always get only the the state of the PLUS-LS

 Never the MINUS_LS even if i change the wiring (PLUS-LS <-> MINUS-LS)

 The switche input is low when hit

 Motor-6.5

 Regards,
 Heinz


 MSTA   R       Motor Status    ULONG   The motor status as received from the
 hardware.  The MSTA bits are defined as follows:

        1. DIRECTION: last raw direction; (0:Negative, 1:Positive)
        2. DONE: motion is complete.
        3. PLUS_LS: plus limit switch has been hit.
        4. HOMELS: state of the home limit switch.
        5. Unused
        6. POSITION: closed-loop position control is enabled.
        7. SLIP_STALL: Slip/Stall detected (eg. fatal following error)
        8. HOME: if at home position.
        9. PRESENT: encoder is present.
       10. PROBLEM: driver stopped polling, or hardware problem
       11. MOVING: non-zero velocity present.
       12. GAIN_SUPPORT: motor supports closed-loop position control.
       13. COMM_ERR: Controller communication error.
       14. MINUS_LS: minus limit switch has been hit.
       15. HOMED: the motor has been homed.

     The record is put into MAJOR STATE alarm if either SLIP_STALL or
 PROBLEM bits are detected. If HLSV is set, then the record is put into
 HIGH alarm if either a high soft limit or hard limit (PLUS_LS) has been
 reached. Similary for the low limits.