File $Source: /home/juda/www/hrc_flight/RCS/door_safe.html,v $
Version $Revision: 1.1 $
Last Update $Date: 2000/01/19 15:39:23 $
HRC CCB Status not reviewed

OP03 Procedures op03:

HRC Command Sequences

Move HRC Door to "Mostly" Closed Position

Description:

This sequence is used to position the HRC detector housing door to a "mostly" closed location, 10000 motor steps from the fully opened position. This position is used to protect the HRC during radiation zone passages.

This sequence assumes that the HRC door is already fully opened. It first configures the motor control system, then moves the door a requested number of steps toward the closed limit switch. Once the door is in position the motor drive is disabled and all motors deselected.

Cautions/Restrictions:

Before executing this sequence the HRC focus shutters must be verified to be in their Home positions (see HRC-C-001).

Flow Diagram

Delta-Time Command Mnemonic Description Cmd Field Mnemonic Data Parameter Telemetry Verifier Expected Value Notes
Verify HRC Door is Open
Verify +Y Shutter is at Home Position
Verify -Y Shutter is at Home Position
00:00:01.000 2MCMRASL Motion Control Mode Reset     2MCMDARS RSET sd6f00
00:00:01.000 2DRMTASL Select Door Motor     2DRMTAST SEL sd7100
00:00:01.000 2STFLADI Clear Stop Flags     2SFLGAST DISA sd5400
00:00:01.000 2STFLAEN Enable Stop Flags     2SFLGAST ENAB sd5401
00:00:01.000 2SMOIADI Disable Selected Motor Over-current Protection     2DROIAST DISA sd4900
00:00:01.000 2SMOTAEN Enable Selected Motor Over-temperature Protection     2DROTAST ENAB sd4a01
00:00:01.000 2CHPLADI Disable Primary Closed/Home Limit Switch     2CPLSAST DISA sd5000
00:00:01.000 2CHSLAEN Enable Secondary Closed/Home Limit Switch     2CSLSAST ENAB sd5101
00:00:01.000 2OMPLADI Disable Primary Open/Max Limit Switch     2OPLSAST DISA sd5200
00:00:01.000 2OMSLADI Disable Secondary Open/Max Limit Switch     2OSLSAST DISA sd5300
00:00:01.000 2MDRVAEN Enable Motor Drive Electronics     2MDRVAST ENAB sd6801
00:00:01.000 2PSHBALD Load High-byte motor control position word (39dec [0x27] for 10000dec steps) 2PSHBAL1 39     sd1827
00:00:01.000 2PSLBALD Load Low-byte motor control position word (16dec [0x10] for 10000dec steps) 2PSLBAL1 16 2SCTHAST 10000 sd1910
Verify Proper Motor Controller Configuration
00:00:01.000 2NSTAAEX Move loaded position word steps toward closed/home limit switch     2MCNAAMD CMD sd6c01
Wait while detector housing door moves (10000 steps/125 steps/s = 80 s minimum
Verify Motor Controller Status indicates finished moving requested number of steps toward open/maximum limit switch (2MSNAAMD = NMOV)
00:00:01.000 2MDRVADI Disable Motor Drive Electronics     2MDRVAST DISA sd6800
00:00:01.000 2ALMTADS Deselect All Motors     2ALMTAST SEL sd7000


$Log: door_safe.html,v $

Revision 1.1 2000/01/19 15:39:23 juda

Initial revision


Dr. Michael Juda
Harvard-Smithsonian Center for Astrophysics
60 Garden Street, Mail Stop 70
Cambridge, MA 02138, USA
Ph.: (617) 495-7062
Fax: (617) 495-7356
E-mail: mjuda@cfa.harvard.edu