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1.2 Front-Panel Operation

1 – 5

proximately 1 Hz. This mode is intended to help facilitate mechanical
alignment and identiﬁcation of the shutter heads. This function is
only available when connected shutter head is enabled and in the

Manual

control mode.

1.2.2

Global controls

The four keys in the Global Control section of the front panel provide
functions that address all four channels or the instrument as a whole.

1.2.2.1 Global manual control: Set and Reset

The top half of the Global Control section has two keys,

Reset

and

Set

. These keys a

ﬀ

ect all channels that are currently enabled

and in the

Manual

source mode, and are only operational when the

instrument is under local control. Pressing

Set

commands each

ﬀ

ected shutter channel to its

Normal

state, and pressing

Reset

returns each a

ﬀ

ected shutter channel to its

Normal

state.

If a shutter channel is not in

Manual

mode when

Reset

Set

is pressed, the saved “manual state” will be updated for when the
channel is eventually returned to manual control.

Holding down either

Reset

Set

for approximately two seconds

will

force

global Set

Reset, meaning that all four channels will be

placed in the

Manual

source mode and all enabled channels will be

commanded to their respective

Normal

states.

Each shutter channel on the SR474 can independently be conﬁgured
to be normally open or normally closed by setting rear-panel DIP
switches (

1.3.7).

1.2.2.2 Alarm key

The

Alarm

key toggles the conﬁguration of the SR474 audio alarm

between the states of

Audible

and

Mute

The rear-panel

Alarm

output (

1.3.6) is asserted (pulled low) when-

ever at least one of the four shutter channel

FAULT

indicators is lit.

In the event that an alarm is asserted, the SR474 will continuously
emit a loud siren-like noise to attract attention if the

Audible

mode

is selected. No alarm noise will be made while the

Mute

mode is

selected.

An active audio alarm can be silenced by pressing the

Alarm

key,

switching the unit to the

Mute

state. An alarm can also be silenced by

clearing the fault that is causing the alarm– for example, by pressing

SR474 Four Channel Shutter Driver

Содержание SR474

Страница 1: ...d Research Systems Revision 1 0 February 9 2009 Distribution in the UK Ireland Lambda Photometrics Limited Lambda House Batford Mill Harpenden Herts AL5 5BZ United Kingdom E info lambdaphoto co uk W w...

Страница 2: ...returned to a Stanford Research Systems authorized service facility Contact Stanford Research Systems or an authorized representative before returning this product for repair Information in this docu...

Страница 3: ...mbols vi Notation vii Speci cations viii 1 Getting Started 1 1 1 1 Introduction to the Instrument 1 2 1 2 Front Panel Operation 1 2 1 3 The SR474 Rear Panel 1 7 2 Remote Operation 2 1 2 1 Index of Com...

Страница 4: ...ii Contents SR474 Four Channel Shutter Driver...

Страница 5: ...rnately each of the four channels can be individually controlled manually through front panel buttons or through a remote interface The Global Control section of the front panel allows you to set all...

Страница 6: ...o the outlet ground to protect against electrical shock Always use an outlet which has a properly connected protective ground The shields of the six rear panel BNC ports the rear panel Chassis Ground...

Страница 7: ...uct Laser Safety Certain hazards are always present when working with laser radia tion Visible and invisible beams of light have the potential to cause serious bodily injury including blindness or dea...

Страница 8: ...on SRS Products Symbol Description Alternating current Caution risk of electric shock Frame or chassis terminal Caution refer to accompanying documents Earth ground terminal Battery Fuse On supply Of...

Страница 9: ...nventions used in this manual are Front panel buttons are set as Button Front panel indicators are set as Remote Remote command names are set as IDN Literal text other than command names is set as OFF...

Страница 10: ...el Align buttons for each channel ac tive when in manual mode open and close shut ters at 1 Hz chopping rate to assist with mechan ical alignment Gate Inhibit The rear panel aux i o port can be con gu...

Страница 11: ...mpers I O ports Level inputs 4 TTL compatible rear panel input BNC connectors internally pulled up to 3 3 VDC through 100 k Auxiliary I O 1 rear panel BNC connector TTL level multi purpose Alarm outpu...

Страница 12: ...x General Information SR474 Four Channel Shutter Driver...

Страница 13: ...n 1 2 1 2 1 Individual channel controls 1 2 1 2 2 Global controls 1 5 1 2 3 Remote lockout and front panel operation 1 6 1 2 4 Restoring factory default con guration 1 7 1 3 The SR474 Rear Panel 1 7 1...

Страница 14: ...ont Panel Operation The front panel of the SR474 Figure 1 1 provides simple controls for the operator and displays the shutter states at a glance The panel is divided into ve sections four identical s...

Страница 15: ...n channel is initially in the OFF state then pressing Enable will cause the SR474 to attempt to enable the shutter head connected to that channel If the head powers on successfully the channel will di...

Страница 16: ...e state of the shutter is controlled to be open or closed by direct user input as selected by the State key and its indicators 1 2 1 1 In the TTL source mode the state of the shutter is controlled by...

Страница 17: ...en the channel is eventually returned to manual control Holding down either Reset or Set for approximately two seconds will force global Set Reset meaning that all four channels will be placed in the...

Страница 18: ...dark except for the Disp O indicator by the Local key To turn the display back on hold the key for 2 s again Turning o the display may be helpful because it prevents the OPEN and CLOSED indicators fr...

Страница 19: ...on 7 Select manual con guration for the rear Aux I O port Recalling factory default settings this way does not a ect the interface con guration Most of the interface con guration is determined by the...

Страница 20: ...ing post is connected to the SR474 chassis and to earth ground 1 3 3 TTL Inputs The primary control inputs for the SR474 Four Channel Shutter Driver are the four rear panel BNC inputs corresponding to...

Страница 21: ...Fig 1 3 and the signal names are shown in Table 1 1 The shield of each shutter connector is connected to earth ground as it ships from the factory Please see 1 3 9 about grounding consid erations for...

Страница 22: ...o the polarity switches will take e ect after a brief delay 1 3 8 Remote interfaces Remote operation of the SR474 is supported with GPIB RS 232 and Ethernet computer interfaces These interfaces are pr...

Страница 23: ...P Address con guration The IP Address con guration is primarily selected by switches 2 and 3 of the larger DIP switch these position are labeled IP Address Selection As with the GPIB address selection...

Страница 24: ...e and the shield of the cable If the chassis of the shutter head is electrically connected to earth ground for example by way of attachment to a grounded optical table then the shield will be grounded...

Страница 25: ...nt before once again attaching it to power Jumper location Shutter channel J202 1 J206 2 J210 3 J214 4 Table 1 3 Grounding jumper locations Figure 1 5 Shutter cable ground selection header Part a show...

Страница 26: ...1 14 Getting Started SR474 Four Channel Shutter Driver...

Страница 27: ...n 2 6 2 5 Commands 2 6 2 5 1 Command syntax 2 6 2 6 Command List 2 8 2 6 1 Common IEEE 488 2 Commands 2 8 2 6 2 Status Reporting Commands 2 12 2 6 3 Instrument Control Commands 2 13 2 6 4 Interface Co...

Страница 28: ...CL i 2 9 Recall Instrument Settings RST 2 10 Reset the Instrument SAV i 2 10 Recall Instrument Settings SRE i 2 10 Service Request Enable STB 2 11 Status Byte WAI 2 11 Wait for Command Execution Statu...

Страница 29: ...AT c i 2 17 Open Closed State TEMP c 2 17 Shutter Temperature Interface Commands COMP i 2 17 Compatibility Mode EMAC 2 18 Ethernet MAC Address EPHY i j 2 18 Ethernet Physical Layer Con guration IFCF i...

Страница 30: ...tatus Byte WAI 2 11 Wait for Command Execution A ASRT c i 2 13 Assertion State AUXC i c 2 13 Auxiliary I O Con guration AUXI i 2 14 Auxiliary I O State C CHOP c i 2 14 Alignment Mode COMP i 2 17 Compa...

Страница 31: ...y R RATE c 2 16 Maximum Rate REMT 2 20 Go to Remote S SCMD c s b 2 16 Shutter Command SERR c 2 16 Shutter Error Word SPOS c 2 16 Shutter Position SRCE c i 2 16 Source of Control SSER c 2 16 Shutter Se...

Страница 32: ...dress that is settable by remote com mand 2 5 Commands This section provides syntax and operational descriptions for remote commands 2 5 1 Command syntax Communications with the SR474 uses ASCII chara...

Страница 33: ...status register ESR Execution errors can be detected by looking at bit 4 EXE of the event status register In both cases an error code indicating the speci c cause of the error is appended to the error...

Страница 34: ...rresponding bit is set in the ESR register Standard Event Status Register ESR Query the Standard Event Status Register Upon executing a ESR query the returned bits of the ESR register are cleared The...

Страница 35: ...s 0 then the Service Request Enable and Standard Event Status Enable Registers SRE ESE are stored in non volatile memory and retain their values through power cycle events If the value of the ag is 1...

Страница 36: ...Save instrument settings to location i The parameter i may range from 0 to 9 Locations 1 to 9 are for arbitrary use Location 0 is used for current instrument settings This location is overwritten aft...

Страница 37: ...ates that FAULT1 MAV ESB and MSS are set FAULT1 indicates that a fault was detected on channel 1 MAV indi cates that a message is available in the output queue ESB indicates that an enabled bit in ESR...

Страница 38: ...ation are allocated to each channel as follows Bit Meaning 0 Channel 1 fault status bit a 1 Channel 1 fault status bit b 2 Channel 2 fault status bit a 3 Channel 2 fault status bit b 4 Channel 3 fault...

Страница 39: ...ASRT 3 1 CR Example Place shutter 3 in the asserted state ASRT CR Example 210 A return of 210 would indicate that shutters 1 3 and 4 are in an indeterminate state and that shutter 2 is asserted ASRT...

Страница 40: ...CHOP c i Set query alignment mode i e continuous chopping of shutter c to i If parameter i is 0 alignment mode is turned o If it is 1 alignment mode is turned on This command will fail if the given sh...

Страница 41: ...i Valid modes range from 0 to 3 with zero being the default mode The set form sends the byte 0 1 2 or 3 to the shutter The e ect of di erent modes is hardware dependent please see the shutter head man...

Страница 42: ...he response Shutter Position SPOS c Query the shutter position for shutter c A value of 1 indicates the shutter is open A value of 0 indicates the shutter is closed A value of 1 indicates the shutter...

Страница 43: ...1 and 3 STAT 1 1 CR Example Open shutter 1 STAT CR Example 210 A return of 210 would indicate that shutters 1 3 and 4 are in an indeterminate state and that shutter 2 is open STAT 3 CR Example 1 A re...

Страница 44: ...MAC Query the SR474 s ethernet MAC address Ethernet Physical Layer Con guration EPHY i j Set query the physical con guration item i to j The parameter i may be one of the following i Con guration 0 En...

Страница 45: ...et Query Subnet Address Network Mask 11 Set Query Default Gateway 12 Enable Disable compatibility mode at startup Set j to 0 to disable a setting and 1 to enable it Parameters 9 11 require an IP addre...

Страница 46: ...eturns 1 if the lock is granted and 0 otherwise When the lock is granted no other instrument interface may alter instrument settings until the lock is released via the UNLK command or the power is cyc...

Страница 47: ...ASCII character 13 followed by ASCII character 10 The interface terminator may be set to a di erent sequence of up to three characters in length by executing XTRM with parameters that consist of the...

Страница 48: ...scribed below 2 7 1 Execution Errors Error Code Meaning 0 No Error No more errors left in the queue 10 Illegal Value A parameter was out of range 11 Illegal Mode The action is illegal in the current m...

Страница 49: ...SR474 discards any pending output 2 7 3 Device Dependent Errors Error Code Meaning 40 Failed ROM Check The ROM checksum failed The rmware code is likely corrupted 2 7 4 Parsing Errors Error Code Meani...

Страница 50: ...for storing parameter values over owed This probably indicates a syntax error 118 Invalid Floating Point Number The parser expected a oating point number but was unable to parse it 120 Invalid Intege...

Страница 51: ...er owed All data in both the input and output bu ers will be ushed 2 7 6 Other Errors Error Code Meaning 254 Too many errors The error bu er is full Subsequent errors have been dropped SR474 Four Chan...

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