W.H.T. CASSEGRAIN A&G BOX

QUICK REFERENCE GUIDE TO MECHANISM HARDWARE AND SOFTWARE INTERFACE

DRAFT EDITION : J.F.MACLEAN 28 NOVEMBER 1989

SCOPE OF DOCUMENT

This document is intended to be an easy to use reference guide enabling the user to quickly find information that will assist in fault finding on the instruments electronic systems.

The guide (printed version) has one page devoted to each mechanism. This means all the information pertinent to a particular mechanism is in one place. The information given on each mechanism ties the hardware and 4MS software together. It is also intended to help decipher the diagnostic messages returned from the 4MS.

The document is supplied in a loose leaf format, allowing it to be arranged in the manner most convenient to the user. It is suggested however that it be arranged in order of the Stepper Motor boxes i.e. box Al - 4, Bl- 4 etc. Much of the other documentation is arranged in this fashion.

This is a draft copy. Any comments or criticisms you have that will make the document more useful would be welcome.

Send your destructive comments to :

John Maclean or Andrew Ridings
Electronics dept.
RGO
Herstmonceux (Cambridge after March 1990) or email them to: awr@ing.iac.es

A&G UNIT MECHANISM MNEMONICS

TAC - TV acquisition/comparison
TSV - TV slit view
FSF - Small fibre feed (Aux port feed)
FLF - Large fibre feed (INGRID mirror)
AFI - Autoguider filter
AFO - Autoguider focus
AGR - Autoguider radial
FOP - Aux Filter Wheel
TFO - TV focus
MFC - Main filter colour
TFI - TV filter
TFR - TV focal reducer
MFN - Main filter ND
CFN - Comparison filter ND
CFC - Comparison filter colour
AGT - Autoguider theta
MFD - Main filter door
CLP - Comparison lamps

MECHANISM NAME KEY

WIRING DRG# ........................Reference number of drawing showing wiring details of mechanism.

MNEMONIC ...........................Three character mnemonic. Used in ethernet datagrams and 4MS software to reference mechanism.

PERMITTED OPS. ..................Operations mechanisms permitted to perform. Possible ops. are Re-program SMDM, Barcode table
read, Stop, Move, Initialise, Read barcodes, Delayed status, lmmediate status.

SMDM .....................................Stepper Motor Drive Module driving the mechanism.

CHANNEL# ............................Channel of SMDM driving the mechanism.

BCRM ......................................BarCode Reader Module associated with the mechanism.

CHANNEL# ............................Channel of BCRM associated with the mechanism.

POSITION ...............................Possible positions of mechanism. Listed across the page or given as a range.

STEPS ......................................Number of steps for a given position. Listed below relevant position or given as steps per unit of displacement.

DATUM SWITCHES ..............Value seen in the DATUM SWITCH entry in status messages or 4MS status table. Listed under relevant position.

SWITCH# ................................Physical switch number, referred to on wiring diagram.

SOLENOIDS ...........................Value seen in SOLENOIDS entry in status messages or 4MS status table. Description of operation or listed under position.

SOLENOID# ...........................Physical solenoid number, referred to on wiring diagram.

ENCODER ..............................If mechanism has an encoder, its type, circuit reference number and manufactures part number are given.

HOST/PIGGY-BACK .............Some mechanisms share the same SMDM channel. A "main" or HOST mechanism will have a second
or PIGGY-BACK mechanism sharing its channel.

INTERLOCKS ........................A brief description of any INTERLOCKS generated by or effecting the mechanism is given.

NOTE: Any special conditions associated with the mechanism are noted here if required.

TAC TV ACQUISITION/COMPARISON PROBE

WIRING DRG# ........................ED 4666

MNEMONIC ...........................TAC

PERMITTED OPS. ..................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM .....................................A

CHANNEL#

BCRM

CHANNEL#

POSITION................................0 (OUT) 1 (IN)

STEPS ......................................0 27250

DATUM SWITCHES ...............1 2

SWITCH# .................................2, 1

SOLENOIDS............................ OFF (0) when stopped. ACTIVATED (3) when moving

SOLENOID# ............................BR1

ENCODER

HOST/PIGGY-BACK

INTERLOCKS ........................Interlocked with : TV SLIT VIEWING PROBE, LARGE FIBRE FEED FLAT, SMALL FIBRE FEED FLAT

Will not MOVE unless the 3 probes listed above are in the OUT position. This must be confirmed by the activation of their datum switches. Can be initialised at any time.

TSV TV SLIT VIEWING PROBE

WIRING DRG# .............................ED 4666

MNEMONIC ................................TSV

PERMITTED OPS- .......................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM ...........................................A

CHANNEL# ...................................2

BCRM -

CHANNEL#

POSITION .....................................0 (OUT) 1 (IN)

STEPS ............................................0 to 22000

DATUM SWITCHES ....................1 2

SWITCH# ......................................3, 4

SOLENOIDS .................................OFF (0) when stopped. ACTIVATED (3) when moving..

SOLENOID# .................................BR2

ENCODER

HOST/PIGGY-BACK

INTERLOCKS ...............................Interlocked with : TV ACQUISITION/COMPARISON PROBE, LARGE FIBRE FEED FLAT, SMALL FIBRE FEED FLAT

Will not MOVE unless the 3 probes listed above are in the OUT position, This must be confirmed by the activation of their datum switches. Can be initialised at any time.

FSF SMALL FIBRE FEED FLAT PROBE (AUX PORT feed mirror)

WIRING DRG#......................... ED 4667

MNEMONIC ............................FSF

PERMITTED OPS. ...................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM ......................................A

CHANNEL# ..............................3

BCRM -

CHANNEL#

POSITION ................................0 (OUT) 1 (IN)

STEPS .......................................0 to 22300

DATUM SWITCHES ................1 2

SWITCH# ................................. 5, 6

SOLENOIDS ............................OFF (0) when stopped, ACTIVATED (3) when moving..

SOLENOID# .............................BR3

ENCODER

HOST/PIGGY-BACK

INTERLOCKS ............................Interlocked with : TV ACQUISITION/COMPARISON PROBE, TV SLIT VIEWING PROBE, LARGE FIBRE FEED FLAT

Will not MOVE unless the 3 probes listed above are in the OUT position. This must be confirmed by the activation of their datum switches. Can be initialised at any time.

FLF LARGE FIBRE FEED FLAT PROBE (INGRID feed mirror)

WIRING DRG# .........................ED 4667

MNEMONIC ............................FLF

PERMITTED OPS. ....................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM .......................................A

CHANNEL# ...............................4

BCRM -

CHANNEL#

POSITION ................................0 (OUT) 1 (IN)

STEPS .......................................0 to 28200

DATUM SWITCHES ...............1 2

SWITCH# ................................ 8, 7

SOLENOIDS ............................OFF (0) when stopped, ACTIVATED (3) when moving.

SOLENOID# ............................BR4

ENCODER

HOST/PIGGY-BACK

INTERLOCKS ........................Inter-locked with : TV ACQUISITION/COMPARISON PROBE, TV SLIT VIEWING PROBE, SMALL FIBRE FEED FLAT

Will not MOVE unless the 3 probes listed above are in the OUT position. This must be confirmed by the activation of their datum switches. Can be initialised at any time.

AFI AUTOGUIDER FILTER WHEEL

WIRING DRG#........................ ED 4668

MNEMONIC........................... AFI

PERMITTED OPS. ...................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM ......................................B

CHANNEL# .............................1

BCRM -

CHANNEL# -

POSITION ................................0 1 2 3 4 5

STEPS .......................................0 200 400 600 800 1000

DATUM SWITCHES ...............1 0 0 0 0 0

SWITCH# .................................32 - - - - -

SOLENOIDS -

SOLENOID#

ENCODER

HOST/PIGGY-BACK

INTERLOCKS

AFO AUTOGUIDER FOCUS

WIRING DRG# ............................E D 4668

MNEMONIC ...............................AFO

PERMITTED OPS. .......................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM ..........................................B

CHANNEL# .................................2

BCRM -

CHANNEL# -

POSITION ....................................0 to 8000 um

STEPS ...........................................0.4 STEPS / um

DATUM SWITCHES ...................1 2

SWITCH# .....................................33, 34

SOLENOIDS -

SOLENOID# -

ENCODER ....................................LVDT. Circuit ref. E3 Type DGS.

HOST/PIGGY-BACK

INTERLOCKS

AGR AUTOGUIDER RADIAL DISPLACEMENT

WIRING DRG#....................... E D 4669

MNEMONIC ..........................AGR

PERMITTED OPS. .................RE-PROGRAM SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM.....................................B

CHANNEL# ...........................3

BCRM -

CHANNEL# -

POSITION .............................0 to 40000

STEPS ....................................0.4 STEPS / um

DATUM SWITCHES .............1 2

SWITCH# ..............................35, 36

SOLENOIDS -

SOLENOID#

ENCODER ............................LVDT. Circuit ref. E4 Type DC25.

HOST/PIGGY-BACK

INTERLOCKS

FOP AUX FILTER WHEEL

WIRING DRG#............................. ED 4669

MNEMONIC ................................FOP

PERMITTED OPS. .......................Immediate status.

SMDM ..........................................B

CHANNEL# .................................4

BCRM -

CHANNEL#

POSITION ...................................0 to 5

STEPS -

DATUM SWITCHES ...................1 0

SWITCH# .....................................37

SOLENOIDS -

SOLENOID# -

ENCODER -

HOST/PIGGY-BACK -

INTERLOCKS -

TFO TV FOCUS

WIRING DRG# .............................ED 4670

MNEMONIC ................................TFO

PERMITTED OPS. .......................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM ..........................................C

CHANNEL# ..................................1

BCRM -

CHANNEL# -

POSITION ....................................0 to 17000 um

STEPS ...........................................0.1 STEPS/ um

DATUM SWITCHES ....................1 2

SWITCH# ......................................9, 10

SOLENOIDS .................................OFF (0) when stopped. ACTIVATED (3) when moving.

SOLENOID# .................................BR5

ENCODER ....................................LVDT. Circuit ref. E l. Type DC 15.

HOST/PIGGY-BACK

INTERLOCKS

NOTE: Switch 10 is a "soft" limit switch and should never be activated in normal operation.

MFC MAIN FILTER TRAY COLOUR

WIRING DRG#..................................... ED 4670

MNEMONIC........................................ MFC

PERMITTED OPS. ...............................Re-program, Stop, Move, Initialise, Read, Delayed status, immediate status.

SMDM ..................................................C

CHANNEL# ..........................................2

BCRM ...................................................E

CHANNEL# ..........................................1

POSITION .............................................0 1 2 3 4 5

STEPS ....................................................0 16000 24000 32000 40000 48000

DATUM SWITCHES ............................1 0 0 0 0 0

SWITCH# ..............................................14 - - - - -

SOLENOIDS -

SOLENOID# -

ENCODER -

HOST/PIGGY-BACK -

INTERLOCKS Interlocked with: MAIN FILTER ACCESS DOOR

Will not MOVE or READ if door is open or unlocked.

NOTE: On execution of a BARCODE READ (180) command, the codes of all five filters in the tray will be read and put into a table within the 4MS. To read this table it necessary to send a MCB280 status request. This will return all five code values together with their confidence factors.

TFI TV FILTER WHEEL

WIRING DRG# ..............................ED 4671

MNEMONIC .................................TFI

PERMITTED OPS. .........................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM ............................................C

CHANNEL# ....................................3

BCRM -

CHANNEL# -

POSITION .....................................0 1 2 3 4 5

STEPS ............................................0 200 400 600 800 1000

DATUM SWITCHES .....................1 0 0 0 0 0

SWITCH# ......................................15 - - - - -

SOLENOIDS -

SOLENOID#

ENCODER

HOST/PIGGY-BACK

INTERLOCKS

TFR TV FOCAL REDUCING SYSTEM

WIRING DRG#................................ ED 4671

MNEMONIC ...................................TFR

PERMITTED OPS. ..........................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM .............................................C

CHANNEL# .....................................4

BCRM -

CHANNEL#

POSITION .......................................0 (OUT) 1 and 2

STEPS ..............................................0 6600 15800

DATUM SWITCHES .......................1 2 4

SWITCH# ........................................16, 17, 18

SOLENOIDS ...................................OFF (0) when stopped, ACTIVATED (3) when moving.

SOLENOID# ...................................BR6

ENCODER

HOST/PIGGY-BACK

INTERLOCKS

MFN MAIN FILTER TRAY NEUTRAL

WIRING DRG# ...............................ED 4672

MNEMONIC ..................................MFN

PERMITTED OPS. .........................Re-program, Stop, Move, Initialise, Read, Delayed status, Immediate status.

SMDM ............................................D

CHANNEL# ...................................1

BCRM ............................................E

CHANNEL# ...................................2

POSITION ......................................0 1 2 3 4 5

STEPS .............................................0 16000 24000 32000 40000 48000

DATUM SWITCHES .....................1 0 0 0 0 0

SWITCH# .......................................21 - - - - -

SOLENOIDS -

SOLENOID#

ENCODER

HOST/PIGGY-BACK ....................Host to MAIN FILTER ACCESS DOOR (MFD)

INTERLOCKS Inter locked with : MAIN FILTER ACCESS DOOR

Will not MOVE or READ if door is open or unlocked.

NOTE: On execution of a BARCODE READ (180) command, the codes of all five filters in the tray will be read and put into a table within the 4MS. To read this table, it is necessary to send a MNB280 status request. This will return all five code values together with their confidence factors.

CFN COMPARISON FILTER WHEEL NEUTRAL

WIRING DRG#.......................... E D 4672

MNEMONIC .............................CFN

PERMITTED OPS. .....................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM .......................................D

CHANNEL# ..............................2

BCRM -

CHANNEL# -

POSITION .................................0 1 2 3 4 5 6 7

STEPS ........................................0 150 300 450 600 750 900 1050

DATUM SWITCHES .................1 3 5 7 9 0B 0D 0F

SWITCH# ...................................Position encoded by switches 22, 23, 24, 25

SOLENOIDS

SOLENOID#

ENCODER

HOST/PIGGY-BACK

INTERLOCKS

CFC COMPARISON FILTER WHEEL COLOUR

WIRING DRG# .......................ED 4673

MNEMONIC.......................... CFC

PERMITTED OPS. ..................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM .....................................D

CHANNEL# ............................3

BCRM -

CHANNEL# -

POSITION ...............................0 1 2 3 4 5 6 7

STEPS ......................................0 150 300 450 600 750 900 1050

DATUM SWITCHES ...............1 3 5 7 9 0B 0D 0F

SWITCH# .................................Position encoded by switches 26, 27, 28, 29.

SOLENOIDS

SOLENOID#

ENCODER

HOST/PIGGY-BACK

INTERLOCKS

AGT AUTOGUIDER THETA MOVEMENT

WIRING DRG#..........................E D 4673

MNEMONIC.............................AGT

PERMITTED OPS. ....................Re-program SMDM, Stop, Move, Initialise, Delayed status, Immediate status.

SMDM .......................................D

CHANNEL# ..............................4

BCRM -

CHANNEL# -

POSITION ................................0 to 180000 milli-degrees

STEPS .......................................1.5 milli-degrees / step

DATUM SWITCHES ................1 2

SWITCH# .................................30, 31

SOLENOIDS -

SOLENOID#

ENCODER ...............................Absolute rotary encoder. Circuit ref. E2 Type Heidenhain ROC 717.

HOST/PIGGY-BACK

INTERLOCKS

MFD MAIN FILTER ACCESS DOOR

WIRING DRG# ..............................ED4672

MNEMONIC................................. MFD

PERMITTED OPS. ........................Stop, Move, Delayed status, Immediate status.

SMDM........................................... D

CHANNEL# ..................................1

BCRM

CHANNEL#

POSITION ....................................(Closed & Locked) X (Open & Unlocked) X (Closed & Unlocked) 1 (Open & Unlocked)

STEPS

DATUM SWITCHES ....................3 2 1 0

SWITCH# .....................................19 (Door position) 20 (Locking bolt position)

SOLENOIDS .................................0 0 1 1

SOLENOID# .................................SOL1

ENCODER

HOST/PIGGY-BACK ...................Piggy-backed onto MAIN FILTER TRAY NEUTRAL (MFN)

INTERLOCKS lnterlocked with : MAIN FILTER TRAY COLOUR, MAIN FILTER TRAY NEUTRAL

The two above mechanisms cannot carry out MOVE or BARCODE READ commands unless the door is CLOSED and LOCKED.

NOTE: The POSITION entry shows two indeterminate positions (marked X). These conditions are reached in-between the two valid positions and are shown only to illustrate the meaning of the switch values.

CLP COMPARISON LAMPS

WIRING DRG# .............................ED 4674

MNEMONIC ................................CLP

PERMITTED OPS........................ Stop, Move, Delayed status, Immediate status.

SMDM -

CHANNEL# -

BCRM -

CHANNEL# -

POSITION ....................................0 to 511

STEPS -

DATUM SWITCHES -

SWITCH# -

SOLENOIDS -

SOLENOID# -

ENCODER -

HOST/PIGGY-BACK -

INTERLOCKS -

NOTE: There are a total of 9 lamps, each is controlled by one bit of a nine bit number. To turn a lamp ON, set its bit to 1. To turn a lamp OFF set its bit to 0.

..........................W......... CuAr ........CuNe....... NaK .......AlMgCa ........ThAr......... FeAr....... FeNe....... D

LAMP# .............9............ 8............... 7............... 6.............. 5................... 4................3............. 2........... 1

BIT VALUE ...256 ........128............ 64.............. 32........... 16................... 8............... 4 .............2 ...........1