File $Source: /home/juda/www/hrc_flight/RCS/door_open.html,v $
Version $Revision: 1.5 $
Last Update $Date: 1999/05/10 18:08:08 $
HRC CCB Status Approved

OP03 Procedures op03:

HRC Command Sequences

HRC Door Open

Description:

The HRC detector housing door can be opened early in the orbital activation period. It must be opened before high voltage is applied to the MCPs of either the HRC-I or HRC-S.

This command sequence initially calls sequences that select each of the HRC shutters and moves them to their home positions. Once the shutters are verified to be "homed", the door is selected and moved to its open limit switch. After the door is verified to be fully opened the motor drive is disabled and all motors are de-selected.

Cautions/Restrictions:

This sequence requires a real-time contact so that the limit switch verification can be performed.

The HRC +Y and -Y focus shutters must be verified to be in their "Home" positions before this sequence can be executed (see: HRC-C-001)

Flow Diagram

Delta-Time Command Mnemonic Description Cmd Field Mnemonic Data Parameter Telemetry Verifier Expected Value Notes
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 2CHSLADI Disable Secondary Closed/Home Limit Switch     2CSLSAST DISA sd5100
00:00:01.000 2OMPLAEN Enable Primary Open/Max Limit Switch     2OPLSAST ENAB sd5201
00:00:01.000 2OMSLADI Disable Secondary Open/Max Limit Switch     2OSLSAST DISA sd5300
Verify Proper Motor Controller Configuration
00:00:01.000 2MDRVAEN Enable Motor Drive Electronics     2MDRVAST ENAB sd6801
00:00:01.000 2MVLBAEX Move to Open/Max Limit Switch     2MCLBAMD CMD sd6b01
Wait while detector housing door moves
Verify Primary Open/Max Limit Switch Activated (2OPLSAAC = ACTV)
Verify Secondary Open/Max Limit Switch Activated (2OSLSAAC = ACTV)
Verify Door Open Limit Switch indicates Open (2DRLSOP = ACT)
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_open.html,v $

Revision 1.5 1999/05/10 18:08:08 jhc

corrected initial time delay to 1 sec

Revision 1.4 1999/04/07 18:37:24 juda

HTML changes: added DOCTYPE and ALT reference for flow diagram - added "name" tags to sub-sequences

Revision 1.3 1998/06/01 12:22:50 juda

Corrected 2SMOTAEN serial digital value (changed sd4a00 to sd4a01) - changed 2SMOIAEN line to 2SMOIADI (entire line enable to disble) - reformatted table entries for telemetry verification of end motion

Revision 1.2 1998/05/12 19:06:02 juda

Added shutter verification at start of sequence - fixed table formatting of telemetry verifier descriptions. Marked as verified.

Revision 1.1 1998/05/08 15:53:49 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