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Manual - Astronics Test Systems

1. OPERATIONS gt Slot 01 1260 121A Channel 00 Status Open 3 Rotate the knob until line 2 shows the contents of slot 3 OPERATIONS sSTot 03 1LLATTIn lt Port 00 Write Value 255 4 Press the third key to select line 3 of the display port number QPERATIONS Slot 03 114TTL gt Port 00 Write lt Value 255 5 Rotate the knob until line 3 shows the desired port number which in this example is 4 and the desired mode which is Enable OPERATIONS Slot 03 114TTL gt Port 04 Enable Status Disabled Now line 4 shows the enable status of the eight bit buffer for port 5 Enabled or Disabled In this case it is disabled 6 Press the bottom key to select the bottom line of the display Then rotate the knob until the display reads as follows OPERATIONS Slot 03 114TTL gt Port 04 Enable lt lt Set to Enabled 7 Press the bottom key to complete the operation Description Using the Front Panel Controls 3 13 1256E User Manual Publication Number 980873 Rev A The Path Control Menu automatically retrieves pathnames stored in non volatile memory at startup and provides the user with direct control of pathnames from the 1256 front panel display It allows the following operations e View the states of pathnames closed or open in the system e Set pathname
2. Figure 2 4 Activating Main AC Power Getting Started 2 4 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Self Test Verifying the Installed Plug Ins Astronics Test Systems The 1256 automatically performs a self test immediately after power is applied The self test completes within ten seconds after power application If a failure is detected a message appears on the front panel display If this occurs refer to Appendix C Troubleshooting to solve the problem If the self test does not detect a problem the front panel display will show the main menu The top line line 1 of the display appears as follows OPERATIONS The contents of lines 2 through 4 depend upon which plug ins are installed The front panel controls provide a way to verify which plug ins are installed in the 1256 For example suppose the following plug ins are installed Slot 1 1260 121A Slot 2 1260 138A Slot 3 1260 118 Slot 4 Empty no module Slot 5 Empty no module Slot 6 Empty no module Slot 7 Empty no module Slot 8 Empty no module You may verify the installation of these plug ins as follows 1 Press the top key on the keypad next to the display see Figure 1 2 Rotate the knob until the top line reads OPERATIONS The markers gt and lt indicate that this line has been selected by pressing the corresponding button When a line i
3. DELete channel list ALL The following examples illustrate the use of this command to define exclude lists EXCLUDE 1 0 19 2 0 19 CLOSE 1 0 CLOSE 2 11 CLOSE 1 15 17 The first command establishes an exclude list of channels 0 through 19 on module 1 and channels 0 through 19 on module 2 The second command closes channel 0 on module 1 The third command closes channel 11 on module 2 This command will cause channel 0 on module 1 to open since both channels are on the exclude group together The fourth command closes channel 17 on module 2 Channel 15 is never closed since it is excluded by channel 17 Channel 11 on module 2 is opened prior to closing channel 17 since channels 11 and 17 are on the exclude group together The INCLUDE and EXCLUDE relationships of channels can cause multiple closures and openings when commanding a single channel to close For example assume the following commands have been executed INCLUDE 1 0 5 10 12 INCLUDE 1 13 19 Advanced SCPI Operations 8 6 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Using External Triggering Selecting the Trigger Source Astronics Test Systems EXCLUDE U EXCLUDE 1 1 14 EXCLUDE CLOSE 1 0 After these commands have been executed channel 0 of module 1 is closed Also channels 1 through 4 10 and 12 are
4. returns the reply Advanced SCPI Operations 8 4 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Using Exclude Lists Astronics Test Systems 81 0 2 0 4 0 1 3 5 2 7 10 3 16 19 4 1 4 14 23 The INCLUDE query with no parameters passed returns all presently defined include groups Each group is separated from each other by a comma Note that if there are many include lists defined the query may result in a reply which is longer than the length of the output reply buffer 1024 characters In this case the Query Interrupted error will be placed on the error queue and the output reply buffer will be cleared To avoid this always specify a channel list with this query The reply to the INCLUDE query does NOT contain module names nor does it contain path names In addition when 3 or more consecutive channels are defined in the include list the reply will represent the channels as a range of channels with a colon between the first and last channels in the range For example if the following commands are executed MODULE DEFINE matrix 1 MODULE DEFINE power 2 INCLUDE matrix 14 103 104 105 106 power 3 7 12 16 17 18 then the query INCLUDE matrix 105 returns the reply C1 1471032106 2132 7 12 16 18 After power up and after a RST command has been executed all INCLUD
5. lt address gt lt channel list gt lt address gt channel LESS pais is used For example CLOSE 3 1 10 17 7 15 8 8 10 This closes the following relays Slot 3 channels 1 through 10 and 17 Slot 7 channel 15 Slot8 channels 8 through 10 Each plug in module controlled by a 1256 may be given a name This name may be used in place of the slot number in any command used to control a relay The MODULE DEFINE command MOD DEF may be used to define a name of a plug in module The syntax for this command is MOD DEF lt module name gt lt module address gt The lt module name gt is a string of up to 44 characters It must begin with a letter between A and Z After the first letter all other letters may be A Z 0 through 9 and the underscore amp o NOTE The module name may be 44 characters However to maintain true SCPI compatibility it must not exceed 12 characters Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Examples of valid commands are as follows Assigns name to plug in module 1 slot 1 MOD DEF A 1 Assigns name to plug in module 7 MOD DEF ABCDEFGHIJKL 7 Assigns name to plug in module 8 MOD DEF A12345678901 8 Assigns name to plug in module 2 MOD DEF ZZZZZZ2 2 Examples of invalid commands are as follows Incorrect the module name must appear first MOD DEF 5 ABCD
6. Incorrect the module name must begin with a letter MOD DEF 4ASDF 8 Incorrect for SCPI compatibility only the module name is 13 characters long and it must be lt 12 MOD DEF A123456789012 5 The following examples show how to use module names in place of plug in addresses Assigns the name matrix to plug in 5 MOD DEF matrix 5 Closes row 0 column 23 of matrix CLOSE matrix 23 Assigns the name Power to module 6 MOD DEF Power 6 Close Power relay channels 7 through 12 CLOSE fPower 7 12 Closes relays on two modules CLOSE Power 8 matrix 102 104 Astronics Test Systems SCPI Command Basics 5 29 1256E User Manual Removing Module Names Reading the Presently Defined Module Names SCPI Command Basics 5 30 Publication Number 980873 Rev A The MODULE DELETE command may be used to delete a single plug in module name from the list of known module names The MODULE DELETE ALL command may be used to remove all presently defined module names The syntax for these commands is ROUTe MODule DELete module name ALL The following examples illustrate the use of this command Removes the name scanner ROUTE MODULE DELETE scanner Removes the name matrix MOD DEL matrix Remove all names OD DEL ALL The MODULE CATALOG command may be used to read back all of the presently defined module names The format for this
7. SREZ QUES ct 5 15 SN A A O n 5 16 OPC GCGommand adire a a mate te utate t e ese buds donne Dude gene iaa ardea Sanat 5 16 A m HM a ae ease 5 16 AO NONEM AS Mc O SVETE Enn 5 17 als A ct ce eS Pee Piney AE One i erg oe 5 17 Foe QUE ess e a nas 5 18 ROL COMIMANOciteni tachment a ses dades 5 18 eon atari ig si sri at OG A alec oN aaah eo 5 18 pike oq R G10 8910 012 laS EAEE A d T 5 19 Astronics Test Systems iii 1256E User Manual Publication Number 980873 Rev A TRAE Command erica 5 20 WAI Command inore o end 5 20 SGP Stalus IRGQISICIS usina 5 20 SCPI Parameter Type iu 5 23 Numeric Par melefs eoe pet tpi ro pice pde dec tbe Pectus beet pac teak ent dettes 5 23 Discrete Parameters eo oe tie erre e Sa tues epa cca na nr sae sie eua ig ee 5 23 Bool amParamielels antros 5 24 Command Input Buffer rt cnr dx e ehe reda aac d nat ds 5 25 Reply Qutput BUS E P S 5 26 Specifying Channels in Commands ssssssssseeseseeseeee nenne nnne nnne nn nnne 5 27 Naming Relay Gatti octo D lena 5 28 Defining Module Names ter a 5 28 Removing Module Nares oorr tb Eb i e ben ee b oe picta 5 30 Reading the Presently Defined Module Names seem 5 30 Reading the Module Address for a Module Name ssssee 5 31 Storing the Module Names in Non Volatile Memory seeeemRe 5 31 Naming a Pathi e E ET 5 32 Defining Path Names rte e 5
8. The lt seqmode gt parameter may be one of three modes IMM Immediate Causes channels relays to be opened and closed as quickly as possible The sequence of opening and closing is indeterminate In this mode care must be taken to avoid damaging equipment while the relays are in transition i e by short circuiting power supplies connecting high power outputs together or applying excessive power to low impedance inputs BBM Break Before Make Causes existing channel closures to be opened before new channel closures are made BBM is the default mode on power up or after the 1255A has been reset MBB Make Before Break Causes new channel closures to be made before existing channel closures are opened For example the following command ROUTE CONFIGURE 4 MBB causes switch module 4 the switch plug in installed in slot 4 to operate in Make Before Break mode Advanced SCPI Operations 8 1 1256E User Manual Publication Number 980873 Rev A The 1256 provides the capability to define sets of relays which operate together This feature is called an include list When a relay on an include list is closed all relays on that include list are closed Likewise when a relay on an include list is opened all relays on that include list are opened Include Lists A channel may reside on at most one include list An attempt to place a relay on a second include list results in an error
9. SCPI Compliance Information User Interface Lockout Astronics Test Systems For example the reply 0 No error indicates that no errors remain on the error queue while the reply 102 Syntax error missing sign indicates that a syntax error was detected in a previous command to the 1256 The reply 350 Queue overflow is returned to indicate that all 15 places in the queue have been occupied and that the error queue is full The SYSTEM VERSION query provides information about which SCPI standard the 1256 references and is required for compliance with SCPI The syntax for this command is shown below SYSTem VERSion For example the query SYST VERS always returns the following 1994 0 The syntax for this command is shown below SYSTem KLOCK ON OFF KLOCK The SYSTEM KLOCK command and SYSTEM KLOCK query are used to both control and determine the present state of the user interface In certain applications or environments where the 1256 is under automatic control it may be desired or required that access to the 1256 be prohibited through the front panel user interface SCPI Command Basics 5 39 1256E User Manual SCPI Command Basics 5 40 Publication Number 980873 Rev A For example the command SYST KLOCK ON will cause the 1256 to display a remote operation screen on the display with a message indicating that local mode is in a lockout condition The
10. A These commands are NOT defined in the SCPI standard These commands follow the syntax rules of SCPI to implement this functionality SCPI Command Basics 5 42 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Chapter 6 SCPI COMMAND REFERENCE General This section contains a detailed description of each command that is either specific to the 1256 or common to multiple switch modules The commands are presented in Table 6 1 The commands accepted by the 1256 are shown using the SCPI syntax notation The command syntax in Table 6 1 is displayed using the following conventions Square Brackets Enclose optional keywords or parameters Braces Enclose possible parameters within a command Triangle Brackets lt gt Substitute a value for the enclosed parameter Vertical Bar Separate multiple parameter choices Bold Typeface Letters Designate factory default values Command Only This indicates the command cannot be used in query form Query Only This indicates the command can only be used as a query The command form without the question mark is not allowed To illustrate the SCPI notation a part of the ROUTE command subsystem is shown below ROUTe CLOSe channel list OPEN channel list ALL Command Only Astronics Test Systems SCPI Command Reference 6 1 1256E User Manual Publication Number 980873 Rev A This example shows the follow
11. Bit weight 128 decimal 80 hexadecimal This flag is set when the instrument is powered on User Request Bit 6 Bit weight 64 decimal 40 hexadecimal This bit is never set by the 1256 and will always read 0 Command Error Bit 5 Bit weight 32 decimal 20 hexadecimal This bit is set when a command error is detected by the 1256 Errors of this type will also result with an error added to the error queue The error may be read using the SYST ERR query to determine the cause of the error Execution Error Bit 4 Bit weight 16 decimal 10 hexadecimal This bit is set when a valid command is received but cannot be executed for some reason For example an error occurs while executing the SAV command When this error occurs an error message is added to the message queue and may be read using the SYST ERR query SCPI Command Basics 5 9 1256E User Manual DDE QYE RQC OPC A bit is set Publication Number 980873 Rev A Device Dependent Error Bit 3 Bit weight 8 decimal 8 hexadecimal This bit is set when a device dependent error is detected For example a 1260 series relay module is read during power up but contains an unknown identification byte value When this error occurs an error is added to the error message queue Query Error Bit 2 Bit weight 4 decimal 4 hexadecimal This bit is set when a query error is detected For example a query is sent but the reply is not read and a seco
12. POINts port CLEar port list CLOCk POLarity module list NORMal INVerted CLOCk POLarity module list BUSY POLarity module list NORMal INVerted BUSY POLarity module list The sequence for using the 1260 114 modules is as follows A Use the DIGITAL CONFIGURE command to select which port s will be used in the synchronous mode of operation and which will be used in the asynchronous mode of operation B For each port to be used as a synchronous port determine if the port will be used as a synchronous input port or a synchronous output port Astronics Test Systems Digital Module Operation 7 7 1256E User Manual Publication Number 980873 Rev A For each Synchronous Output Port 1 Use the DIGITAL STATE command to enable the port 2 Use the DIGITAL SYNCHRONOUS DATA command to load the data bytes which will be clocked out For each Synchronous Input Port 1 Use the DIGITAL STATE command to disable the port 2 Use the DIGITAL SYNCHRONOUS POINTS command to define the number of data points that will be acquired and stored for the port Arm the 1260 114 module by using the DIGITAL SYNCHRONOUS STATE command Generate pulses on the CLKIN line of the 1260 114 module The 1260 114 module will disarm itself when the number of pulses is equal to or greater than the maximum of 1 The greatest number of data points do
13. Selecting the Mode of Operation ooocccccccnccccononocncononnnnnnnnnnnnnnnnnonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnns 7 4 Enabling and Disabling the Poms iaa 7 5 Using the Asynchronous Mode of Operation occcccccccnnccoooccccnncccnnnnnanancccnnncnnnannnn nn nccnnnnnns 7 5 Using the Synchronous Mode of Operation ccccccccnnnonccccnnoconnnnnanancnnnncnnnnnnnnnnnnncnncnnnnn 7 7 Setting Up the Synchronous Pest sis eo ie Bo en e ede 7 9 Arming Ine Digital ModulBS ecco ee pace un eer Bote ptu ses Poco sl 7 13 Checking for Data Transfer Completion ssssenn 7 14 Reading Data from a Synchronous Input Port occccccnnnnnncccconnnnnnnnnnnnnancnnnnnnnnnnnnnnnnnnncnnnos 7 14 Clearing Data from Synchronous Input and Output PortS oooooooccccccccccccncnanccnnnnnonananana nono 7 15 Synchronous Control and Status PINS as peii oi 7 16 Synchronous and Asynchronous Example ccooocccnccccccccccccccnnnnnannnnccnnncnnnnnnnnnnnccnnncnnnnnnenn nes 7 16 o 8 1 ADVANCED SCPI OPERATIONS cocccccccccccnnnnnonnnnnnnnnnnnnnnnnnnnncnnnnnncnnnnnnnnnnnnnnrnrnnnrnnnnnnnnnnncnnnncnnnnnnes 8 1 INTOdUCION heem a ea eos 8 1 Using ROUTE CONFIGURE to Control Switching Sequence ooooccccccccccnncononcccnoncccnanananoncnos 8 1 WMG URNS ie on aa a ie 8 2 Using EXCUSAS caos 8 5 Using External Triggering tai 8 7 Selecting the Trigger Source oocoocccnnnoccccnnnccnnnnnnnnnncnnncnnnnnnnnnnnnnnnnnnnnnnnrnnnnnnnnn nen nnnnnnnnnrnnnnns 8 7 Select
14. The 1256 remote interfaces comply with the Standard Commands for Programmable Instruments SCPI a universal programming language for test and measurement instruments Chapter 5 SCPI Command Basics introduces SCPI and discusses the commands most frequently used with the 1256 For a discussion of all commands that may be used via the 1256 remote interfaces see Chapter 6 SCPI Command Reference Computer Interfaces 4 1 1256E User Manual Using the Ethernet Interface Basic Ethernet Information Ethernet Cabling Guidelines Computer Interfaces 4 2 Publication Number 980873 Rev A The Ethernet standard provides a way to interconnect devices on a common network covering long distances A network may contain as few as two nodes devices A network connecting more than two devices requires the use of a hub but these are inexpensive and readily available and simple to connect They allow many devices to interconnect and communicate with one another To use Ethernet with the 1256 Switching System you need a computer equipped with an Ethernet port and an Ethernet cable The 1256 uses a CAT 5 Ethernet cable consisting of four twisted pair wires terminated by a standard RJ 45 modular plug at each end To connect the 1256 to an Ethernet hub use a CAT 5 cable that is constructed in a straight through configuration Connector 1 Connector 2 Pin 1 TX Pin 1 TX Pin 2 TX Pin 2 TX Pin 3 RX Pin 3 RX Pin
15. VERify RECall STATE OFF ON O 1 STATE When a state of ON or 1 is specified a special flag is stored inside the 1256 non volatile memory structure that instructs it to automatically load any stored verification masks each time power is applied to the 1256 These commands are NOT defined in the SCPI standard These commands follow the syntax rules of SCPI to implement this Advanced SCPI Operations 8 20 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual functionality NOTE The actual process of updating non volatile memory requires a separate SYSTEM NVUPD command This allows multiple relay states exclude lists include lists and module names to be updated in rapid succession followed by a single slower update of the actual non volatile memory Astronics Test Systems Advanced SCPI Operations 8 21 1256E User Manual Publication Number 980873 Rev A This page was left intentionally blank Advanced SCPI Operations 8 22 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Appendix A SPECIFICATIONS General Switch Plug In Interface Compliant with Instruments Adapt A Switch platform Compatible with all Adapt A Switch modules Eight plug in slots Front Panel Vacuum fluorescent display Menu soft keys Optically encoded knob Rear Panel Connectors EEE 488 standard GPIB RS 232 9 pin D SUB TCP IP Ethernet RJ 45 Trigger in BNC Trigger ou
16. all front panel controls are disabled The only way to restore local front panel control is to send the command SYST KLOCK OFF via the remote Ethernet RS 232 or GPIB interface For details on sending the commands SYST KLOCK ON and SYST KLOCK OFF refer to Chapter 4 Computer Interfaces Using the Front Panel Controls 3 19 1256E User Manual Publication Number 980873 Rev A The automatic lockout may be enabled or disabled via the front panel controls if local mode is currently active When lockout is enabled the automatic lockout mode is activated when the 1256 receives any command via a remote interface When lockout is disabled the front panel controls remain active even after the 1256 receives a command other than SYST KLOCK ON via the remote interface However the secure lockout mode becomes active if the 1256 receives a SYST KLOCK ON command regardless of whether the automatic lockout is enabled or disabled To enable or disable the automatic local lockout proceed as follows 1 Press the top key next to the display Rotate the knob until the top line reads SETTINGS lt 2 Select line 2 next to the top line by pressing the second key Rotate the knob until the display reads eS SETTINGS gt Type Remote lt Option Source Status GPIB 3 Select line 3 by pressing the third key Rotate the knob until line 3 reads as shown below sess SETTINGS Type
17. by pressing the second key This selects line 2 so that you may select the slot to work with OPERATIONS gt Slot 01 1260 121A lt Channel 0 Status Open Rotate the knob until line 2 indicates the contents of slot 3 OPERATIONS gt Slot 03 1260 118 Channel O0 Status Open Press the third key to select line 3 of the display channel number OPERATIONS Slot 03 1260 118 gt Channel 0 lt Status Open Rotate the knob until line 3 shows the desired relay channel number which in this example is 4 OPERATIONS Slot 03 1260 118 gt Channel 4 lt Status Open Press the fourth key to select line 4 Rotate the knob until the display reads OPERATIONS Slot 03 1260 118 Channel 4 Set to Closed Press the fourth key to confirm the closure of the relay channel The relay then closes and the display indicates the updated status on line 4 OPERATIONS Slot 03 1260 118 Channel 4 gt Status Closed lt Opening a Relay To open a relay follow the steps given in the above section Closing a Relay except in step 6 rotate the knob until line 4 bottom line of the display reads as shown below OPl Slot 03 Astronics Test Systems ERAT LONS 1260 118 Using the Front Panel Controls 3 9 1256E User Manual Publication Number 980873 Rev A Channel 4
18. controls enabled Enabled keys Not all keys are valid for all have their LEDs menus illuminated e 1256 is in Automatic Local If display reads lockout mode REMOTE OPERATION RS 232 is active lt Local Mode then press key 4 bottom to restore display and controls e 1256 is in Manual Lockout If display reads mode REMOTE OPERATION RS 232 is active Local Mode Lockout then the 1256 is in Manual Lockout mode To restore controls send a SYST KLOCK OFF command to the 1256 via remote interface Troubleshooting C 2 Astronics Test Systems Publication Number 980873 Rev A PROBLEM POSSIBLE CAUSES Display is too dim or too bright e Display intensity needs to 1256E User Manual WHAT TO DO e Set display intensity see be set to personal preference RS 232 Remote Interface Chapter 3 Using the Front Panel Controls under the heading Enabling or Setting the Display Intensity WHAT TO DO PROBLEM POSSIBLE CAUSES Remote terminal receives unintelligible text from 1256 but only immediately after power turn on Text is properly received later on Upon turn on the 1256 sends synchronization data at 115 200 baud to the RS 232 port in case a flash programmer is connected If a programmer is present this indicates to the programmer that the 1256 is ready for programming operations Unintelligible characters on a normal terminal at power up a
19. is shown as DEFine Therefore the following two command keywords are valid DEFINE DEF But the keywords DE DEFI DEF IN are NOT valid Case Sensitivity Command keywords are NOT case sensitive Command parameters are not case sensitive unless the parameter is string data enclosed in quotes For example the following commands are equivalent CLOSE Close Astronics Test Systems SCPI Command Basics 5 3 1256E User Manual Optional Keywords Querying Parameter Setting SCPI Command Terminator SCPI Command Basics 5 4 Publication Number 980873 Rev A Command keywords enclosed in square brackets are optional For example the following commands are valid and equivalent ROUTE CLOSE 5 0 CLOSE 5 0 Most of the commands in SCPI have an equivalent query form The query is used to read the present state of the item that is set with the command The query is formed by adding a question mark to the end of the command keyword For example the command ROUTE CLOSE 5 0 Has an equivalent query ROUTE CLOSE 5 0 The command instructs the 1256 to close channel O on relay module 5 The query inquires about the present open or close state of channel 0 on relay module 5 SCPI commands can be terminated several ways depending on whether the GPIB or RS 232 serial interface is used For commands sent through the GP
20. or host computer acting as a terminal may pace the flow of data coming from the 1256 so that the terminal has time to properly receive the data It also allows the 1256 to pace commands coming from the terminal so that the 1256 has sufficient time to execute the commands as they arrive The 1256 provides three flow control options XON XOFF Software flow control The RS 232 device that is receiving data may send an XOFF character ASCII 1940 to the sending device commanding the sending device to suspend data output Later when the receiving device is ready for more data it may send an XON character ASCII 1740 to the sending device indicating that data transmission may be resumed CTS RTS Hardware flow control The 1256 normally holds the RS 232 Clear To Send CTS line in the TRUE state 12 volts When the 1256 is receiving data and needs to have data transmission suspended it takes the CTS line to the FALSE state 12 volts When it is ready for more data it returns the CTS line to the TRUE state Similarly the data terminal uses the RS 232 Request To Send RTS line to pace data coming from the 1256 The data terminal normally holds the RTS line in the TRUE 12 volts state To suspend data from the 1256 it takes the RTS signal to the FALSE state 12 volts To resume data transfer the terminal takes the RTS signal TRUE again Disabled No flow control If your terminal does not support flow control set the 1256 to
21. unused or contains nothing that the user can change the LED in the corresponding key is not illuminated Pressing such a key has no effect However when the LED in a key is illuminated that key represents a line that can be edited This menu system is easy to use because the display shows all levels simultaneously In addition the user may instantly go to a higher level by simply pressing the corresponding key At the top of the menu hierarchy on the first display line are five menus or general types of functions These menus and the functions they include are e Operations Open and close relays on switching plug ins and set logic levels high or low on digital I O plug ins e Path Control Open and close user selected pathnames stored in non volatile memory paths must be defined and stored through the remote user interface prior to accessing them through the display e Settings Set menu preferences such as IEEE 488 address RS 232 baud rate and display brightness Using the Front Panel Controls 3 7 1256E User Manual Operations Menu Publication Number 980873 Rev A e Store Recall Store switch states and menu preferences to non volatile flash RAM and recall these states and preferences e System Show firmware revisions for boot memory and flash memory This facilitates efficient response when contacting Customer Service To work with one of these menus first push the top key corresponding to line
22. work in nearly all configurations The IEEE STD 488 2 standard defines a set of common commands that perform functions like reset trigger and status operations Common commands begin with an asterisk are four to five characters in length and may include parameters The command keyword is separated from the first parameter by a blank space A semicolon may be used to separate multiple commands as shown below SRST KSIB IDNs SCPI Command Basics 5 5 1256E User Manual Publication Number 980873 Rev A The IEEE 488 2 common commands implemented by the 1256 are described later in this chapter The 1256 complies with this standard for both GPIB and RS 232 operational modes IEEE 488 2 Common The 1256 supports all required IEEE 488 2 commands In addition Commands the optional OPT SAV and RCL commands are supported The following paragraphs describe the IEEE 488 2 commands supported by the 1256 In addition the status reporting model implemented by the 1256 is described The 1256 complies with this standard for both GPIB and RS 232 operational modes The following commands are implemented IDN RST TST CLS ESE ESE ESR SRE SRE STB OPC OPC TRG SAV RCL OPT Identification query Instrument reset Commanded self test Clear status Set the Standard Event Status Enable register Read the Standard Event Status Enable register Read the Standard Event Status
23. 10 Settings Dialog Box ccccoononnocccccnnoncccnnonnnncnncnnnncnnnnnnnnnnnnnnnnnnnnnrnnnnnnnnnnnnnnnnnnnnnnes 4 29 Figure 4 11 ASCII Setup Blalog BOX x eniti ob 4 30 Figure 5 1 IEEE 488 2 Status Reporting Model ccccceeeesesseceeeeeeeeeeeneseeeeeeeceeeeeeeeeenenaeeees 5 8 Figure 7 1 A Port 4 Data after DIG SYNC DATA 97 4 10 20 30 40 suus 7 10 Figure 7 1 B Port 4 Data after DIG SYNC DATA 97 4 50 60 70 80 90 7 10 Figure 7 1 C Port 4 Data after DIG SYNC INDEX Q97 4 8 sse 7 11 Figure 7 1 D Port 4 Data after DIG SYNC DATA 7 4 77 78 sene 7 12 viii Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Figure 8 1 State Transition Diagram For Arming and Triggering the 1256 8 11 Figure 8 2 External Trigger In and External Trigger Out cccceeeeeeeeeeeeneeeeeeeeeeeeeenetneeeeaees 8 13 Figure B 1 Installing the Rack Mount EarS cooccccnononccconncononnnononnccnnnnnnnnnnnnnnnnncnnnnnnnnnnnnnnnnnnnnncnnn B 1 Figure B 2 Hack Mounting liada todita idad B 2 List of Tables Table 3 1 Accessibility of Features irre Lb id aa 3 1 Table 5 1 Power On and Reset State occcoooncccccccnoccnnnccnoccncnonononcnnnononnnnnnnonnnnnnannnnnnnrnnnnnnnrnnnnnnnnnns 5 17 Table 6 1 Commands Implemented by the 1256 cccccccnnnnonccccnonoconccnnanannnnnc
24. 32 Removing Path Name escisi n 5 33 Reading the Presently Defined Path Names sessseeeseeeeeeeennnnn 5 34 Reading the Channel List for a Path NaMe oooooocccccnncnonocccnnncnonanananonnnnnncnnoncnenannnnnnnnnos 5 35 Storing Path Names in Non Volatile Memory seeeemee 5 35 GIoSInd Relays cuoco t emu a estet ic olor 5 35 Opening Relay M 5 36 Checking for Installed Plug INS ciar On rem eto e Fen tren E n FER ck ERR nt gx Fern 5 37 System Comimarids exte re eb eder ads 5 38 Readingi Error Messages c oret oia 5 38 SCPI Compliance Information e ep RR M RE P eec Rp ER das 5 39 User Interface LOCKOUT lada b ptg Pt eia pe pas FRU bes RR E picea 5 39 Non Volatile Update e dic 5 41 Sire MR E 6 1 SCPI COMMAND REFERENCE c ccccececceececeececceeeeceececaueeeceueecaueeaueeeauececausesauaeecueesaueesaeeess 6 1 General na E E O kL de OL a o 6 1 iv Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Pe 7 1 DIGITAL MODULE OPERATION turned lara 7 1 e ee eee ees dead HE Ae GS Ge eS GH GE 7 1 Digital Medule Portas 7 1 Asynchronous Digital Operation oooccconnccnocccccnnnccconananannncnnnnnnnnnnnnnnnnncnnnnnnnnnnnnnnnnnnnnnccnnnnn 7 1 Synchronous Digital Operation ett da an 7 2 Mixing Synchronous and Asynchronous Modes of OperatiON coooocccccccoccccccccccnnnnanancccnnncnns 7 2 Specifying Ports on a Digital Module css ia 7 3
25. 5 0 OPEN 5 12 CLOSE 5 17 OPEN 85 16 18 OPC lt read the reply gt Once the reply from the OPC query is read all of the previous relay operations have been completed The 1256 maintains an output buffer for sending replies to commands This buffer is 1024 characters in length Although unlikely the output buffer could become filled with replies to commands If the output buffer is filled the SCPl defined QUERY Deadlock condition will be detected by the 1256 In this case the output buffer will be cleared and an error will be added to the error queue In addition the query error bit QYE of the IEEE 488 2 Standard Event Status Register will be set The error queue may be read using the SYST ERR query while the Standard Event Status Register may be read using the ESR query When a reply is in the output queue the message available or MAV bit of the status byte is set The status byte of the 1256 may be read using the GPIB serial poll feature Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Specifying Channels in Commands Astronics Test Systems To select a single channel in a command both the address of the relay plug in which contains the relay and the channel number for the relay must be specified The syntax to describe a single channel is lt address gt lt channel gt where lt address gt This is a number in the range 1 t
26. Auto_DHCP If line 4 already indicates Auto DHCP mode then no further action is required Otherwise select line 4 Rotate the knob until the display reads Aa SETTINGS Type TCP IP Option Addr_Mode lt Update Auto_DHCP Then press key 4 again to select the DHCP mode The 1256 is now ready for TCP IP communications Computer Interfaces 4 5 1256E User Manual Computer Interfaces 4 6 5 Publication Number 980873 Rev A It is possible to see when the 1256 successfully negotiates an address with a DHCP server Normally after applying power to a 1256 the octet fields for the IP address gateway address and netmask have values of zero After a DCHP server assigns and address to the 1256 these fields will be non zero To view the first octet of the IP address press the third key selecting line 3 Rotate the knob until the display reads Type TCP IP gt Option IP_Oct_1 lt Status 172 In the example above the first octet would be 172 Continuing to scroll through the various octets under the Option category on the third line would give the complete IP address gateway address and the subnet mask For example if the remaining IP_Oct_2 IP_Oct_3 and IP_Oct_4 fields displayed values of 16 30 35 respectively the DHCP assigned IP address would be 172 16 30 35 It is important to note that while in DHCP mode the values for the various octets can be vie
27. Call Transfer Help Dis als sole 18 l ES Connected 0 00 31 Auto detect Auto detect SCROLL CAPS NUM Capture Print echo Figure 4 8 Main Communications Screen Z Click on the File menu then on Properties to display the Properties dialog box shown in Figure 4 9 your screen may differ slightly Computer Interfaces 4 28 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual 1256 Properties L2 x Phone Number Settings B iss Country code Enter the area code without the long distance prefix Area code Phone number Connect using Direct to Com 2 y Configure Iv Use country code and area code OK Cancel Figure 4 9 Properties Dialog Box Click on the Settings tab The Settings dialog box then appears as shown in Figure 4 10 your screen may differ slightly 1256 Properties 2 Tx Phone Number Settings m Function arrow and ctrl keys act as Terminal keys C Windows keys Emulation Auto detect Jermina Seto Backscroll buffer lines 500 Beep three times when connecting or disconnecting OK Cancel Figure 4 10 Settings Dialog Box Astronics Test Systems Computer Interfaces 4 29 1256E User Manual Publication Number 980873 Rev A Click on ASCII Setup HyperTerminal then displays the ASCII Setup dialog box shown in Figure 4 11 ASCII Setup 1 Lx ASCII Sending M Send line ends with line f
28. DEF oscope 83 0 3 85 15 Once a path name is defined it may be used in a CLOSE or OPEN command OPEN pathl CLOSE G8dmm to P177 CLOSE Gpathl dmm to P177 7 0 10 A CLOSE command for a given pathname will effectively close all channels listed on the close channel list and open those listed on the open channel list An OPEN command for a given pathname will open all channels listed on the close channel list Channels on the open channel list are ignored when using this command Path names may also be used in defining an Include List an Exclude List or a Scan List The following sections describe each of these concepts When using path names with the Include List Exclude List and Scan List the presently defined path is used That is if the following sequence of commands is received PATH DEF PATH1 5 0 7 0 INCLUDE PATH1 1 0 PATH DEF PATH1 86 17 8 23 CLOSE 1 0 then the path definition in effect when the INCLUDE command was defined is used For the example shown then channel 0 on module 5 and channel 0 on module 7 are affected channel 17 on module 6 and channel 23 on module 8 are NOT affected The PATH DELETE command may be used to delete a single path name from the list of known path names The PATH DELETE ALL command may be used to remove all presently defined path names SCPI Command Basics 5 33 1256E User Manual Reading the Presen
29. If the instrument fails to operate satisfactorily shows visible damage has been stored under unfavorable conditions has sustained stress Do not operate until performance is checked by qualified personnel EC Declaration of Conformity We Astronics Test Systems 4 Goodyear Irvine CA 92618 declare under sole responsibility that the 1256E Switching System P N 407837 conforms to the following Product Specifications Safety EN61010 1 1993 A2 1995 ENC EN61326 1997 A1 1998 Supplementary Information The above specifications are met when faceplates are installed over all unused switch plug in slots The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC modified by 93 68 EEC Irvine CA October 7 2003 Director of Engineering This page was left intentionally blank Publication Number 980873 Rev A 1256E User Manual Table of Contents Sg F510 A nn Tn ene TRIO OTR eh rer ot em Pr 1 1 INTRODUCTION coca c a e A a 1 1 OVENI A FT I I MM IM RRA 1 1 FEAS c c nea awash emit eis audit ot Ce LM tI aa A E tem ese 1 2 Base Ol UI s EE 1 2 Erontand hear Pano Sitioco desee Dieses de utr io M iorum MC EUR 1 2 SA ae Ne ct 1 4 Items Shipped with the 1256 2 preste E 1 5 Supe RE 2 1 GETTING STARTED rU 2 1 Mounting OPNS A IM LM MI Mi MUN EM 2 1 Maim AGCOPOWBP o aceite emit edito i a oU NE s ai uM acia 2 1 E 2 3 Numberna
30. Infor iati Oo Loic eee Re ep aede p di OR ead tpa ed 4 2 Ethernet Cabling Guidelines die Lir tee i e e Re Oe Uo ete aliada 4 2 Connecting the Ethernet Cables era Deo Batten DP RE De en 4 3 Selecting the Ethernet Interface ooocoonnnncccccccnnnnccnnnnnnnncnnnnnnnnnnnnnnnnnnncnnnnnnnnnnnnnnnnnnnnnnnnnn 4 3 Entering the Ethernet Communication SettidgS cooccccnnnccconccccnncccnnnnnnnaancnnnnncnananannnnnno 4 5 Using the IEEE 488 GPIB Interface oooooooooooccccccncccccocononcncncnnnnnnnnnnnnnncnnnnnnnnnnnnn nen 4 10 Basic GRID IDO Mal es a 4 10 GPIB Cabling GUIG SINGS e ine dee ea og ee aa 4 11 Connecting the GPIB Gables exercise 4 11 Selecting the GPIB Interace 2 act wa eoe em vie ot en tirada 4 12 Setting the GPIB AO EStdt at iaa 4 13 Service Request SRQ esee ere dd decent 4 14 Using the AS 232 Interface dealin adele eee 4 14 Basic RS 232 Information eee esr ve hades i ss taa 4 14 Equipment POOLING G m EE c edo tase cant dea Senate 4 14 Connecting to a Computer or Data TerMinal oooonnnnnncnnccccnnnccccnnnnananncnnnnnonananan ono ccnncnnnnin 4 15 Connecting to a MOEN onec oi eere e pt a loe 4 16 Selecting the RS 232 Interface ooooononnnnnncccnnnnnnnnncnnoncccnnccnnnnnnnnnnnnnnncn nn cnc nnne 4 18 Setting the Flow Control Option eoe Beso il UC Doro PEDE ror cene 4 19 Setting the Baud Rate EP CE MED DD DNE eae 4 21 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Setting the Messa
31. Output Queue a a ae Eta read by Serial Port Status Byte Register read by STB Service Request o u 2 pun a Es 8g 8 E E i ee ee 6 9 E E O d p S p WE E Ug B ume 0m m 5 9 5 89 3 3 g amp i 5 6 d o 6 Standard 7 61514 3 2 1 O Event Status Register y ESR 8 PERRE See m 5 8 A Standard Event Status Enable i 7 6 5 4 3 2 10 Register l ESE lt value gt A A ESE A NP aM Nu n Service ROS Y y Request Generation mace 7 6 ESBMAV 3 21 0 MSS D A l l m9 2 O ETA F X l 4 a Y O Edo eee ree z a A ee RAT LO Y ME es e iz l 110 Enable Register SRE lt value gt SRE Figure 5 1 IEEE 488 2 Status Reporting Model SCPI Command Basics 5 8 Astronics Test Systems Publication Number 980873 Rev A Standard EVENT STATUS Register STATUS BYTE Register Astronics Test Systems 1256E User Manual Figure 5 1 shows four related registers The Standard Event Status Register the Standard Event Status Enable Register the Status Byte Register and the Service Request Enable Register The Standard Event Status Register reflects the present status of the instrument This register consists of eight 1 bit flags Each flag represents a true or false indication of the corresponding condition The bits of this register are PON URQ CME EXE Power On Bit 7 MSB
32. Remote gt Option Lockout lt Status Disabled 4 If line 4 already shows the desired status then no further action is necessary Otherwise select line 4 Then rotate the knob until the desired state Enabled or Disabled shows on line 4 This example uses Enabled ceu SETTINGS Type Remote Option Lockout lt Update Enabled Then press the fourth key bottom to update the status Pressing any other key cancels the change NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to Using the Front Panel Controls 3 20 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Astronics Test Systems make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Setting RS 232 Parameters For detailed instructions on setting RS 232 parameters such as baud rate and parity refer to Chapter 4 Computer Interfaces Setting GPIB Address and SRQ Settings For detailed instructions on setting the GPIB address and SRQ settings refer to Chapter 4 Computer Interfaces Setting Ethernet IP Netmask and Gateway Settings For detailed instructions on setting Ethernet options refer to Chapter
33. SETTINGS Type RS 232 Option Parity lt Update None Then press the fourth key to confirm the update Pressing any other button cancels the change Set the data terminal or computer to match the settings you select for the 1256 NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Using Microsoft HyperTerminal Astronics Test Systems One of the easiest ways to manually control the 1256 through the RS 232 interface is to use HyperTerminal HyperTerminal is a terminal emulation program that is included with Windows 95 and 98 Before using HyperTerminal or any other terminal emulation program set up the 1256 RS 232 parameters as follows refer to the above sections for details about accessing these settings via the front panel controls Baud rate 9600 Data Bits 8 Parity None Stop Bits 1 Flow Control Disabled EOL Mode CR LF To run HyperTerminal click on Start click on Run then type hypertrm use the exact spelling above Then press Enter The HyperTerminal program t
34. Signal switch plug ins consist of low to moderate current modules such as the 1260 117 and 1260 118 For these plug ins up to 25 of the channels on each plug in may be simultaneously closed under full rated current if the ambient temperature is 50 C or less If the ambient temperature is greater than 50 C de rate the current by 20 Power Switch Plug Ins Power switch plug ins are high current modules such as the 1260 120 and 1260 121 For these their full rated current is allowed on all channels simultaneously at ambient temperatures up to 50 C For ambient temperatures above 50 C de rate the current by 20 Digital I O RF Microwave Matrix and Multiplexer Plug Ins Digital I O e g 1260 114 RF microwave e g 1260 150 matrix e g 1260 145 and multiplexer e g 1260 138A plug ins require no de rating As always the current through any connector pin must not exceed the rated channel current For example if current passes simultaneously through two inputs of the same multiplexer the common side carries the current from both The common current must not exceed the rated channel current Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Chapter 3 USING THE FRONT PANEL CONTROLS i The front panel controls allow you to use the main features of the Introduction 1256 without the use of a remote interface such as IEEE 488 GPIB or RS 232 This may be useful during initial setup or when
35. accordance with MIL T 28800 protecting the user from possible injury due to shorted circuits CAUTION Use only AC power outlets that have a protective ground DO NOT USE a two conductor extension cord or 3 prong to 2 prong adapter that does not provide a protective ground connection The rear panel AC input socket provides a protective ground terminal The 1256 is supplied with a detachable 3 conductor power cord that connects to this protective terminal Only this cord or an equivalent should be used Connection of the power cord to the power outlet must be made in accordance with the following standard color code Power Outlet Wire Color Function American European Line Live Black Brown Neutral White Blue Ground Earth Green Green Yellow CAUTION Position the 1256 to allow easy access to the power switch on the rear panel This switch completely disconnects both sides of the AC power mains CAUTION Using this equipment in a manner not specified in this manual may impair the protection it normally provides Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Installing Plug Ins Make sure the power is turned off before installing or removing plug ins Inserting or removing plug ins with power on may cause damage to the 1256 and the plug ins Figure 2 2 Inserting a Plug In shows the proper way to install an Adapt A Switch plug in into the 1256 chassis When i
36. also known as the Master Status Summary bit Consult the text immediately following Figure 5 1 for a description of the MSS bit and the Service Request Enable register The command has the format SRE SRE value where the lt SRE value gt is an integer numeric value in the range 0 to 255 The value of bit 6 of this register is ignored since it does not make sense to enable an interrupt when an interrupt is generated This query reads the value presently programmed for the Service Request Enable Register This reads the value as programmed by the SRE command The reply to this command is a numeric value in the range O to 255 SCPI Command Basics 5 15 1256E User Manual STB Query OPC Command OPC Query SCPI Command Basics 5 16 Publication Number 980873 Rev A This query reads the value of the Status Byte Register Each bit of this register indicates a true false status condition When the bit is set the corresponding condition is TRUE when the bit is cleared the condition is FALSE The bit assignments are defined by the IEEE 488 2 specification The bit assignments are described in the Status Byte Register section of this chapter The value returned by the STB Query may also be read using the GPIB serial poll command Note that bit 6 MSS of the Status Byte Register remains set until all enabled conditions are cleared This is in contrast to the GPIB serial poll operation where the SR
37. are armed using this command The following examples illustrate the use of the command Arm the digital module at module address 7 DIGITAL SYNC STATE 7 ON Arm the digital modules at module addresses 3 5 and 9 DIG SYNC STATE 3 5 9 ON Arm the digital modules at module addresses 3 4 5 6 9 and 11 DIG SYNC STATE 3 6 11 9 ON After the module has been armed it will remain armed until A The DIGITAL SYNCHRONOUS STATE command is used to disarm the module OR B The number of data bytes collected for all input ports matches the number of points defined for the port DIGITAL SYNC POINTS command and the number of data bytes output for each output port matches the number of data bytes loaded DIGITAL SYNC DATA command One byte will be clocked out for each output port on the module for each CLKIN pulse received One byte will be read for each input port on the module for each CLKIN pulse received Digital Module Operation 7 13 1256E User Manual Publication Number 980873 Rev A Checking for Data The DIGITAL SYNCHRONOUS STATE query is used to read whether the digital module is armed When all of the data transfer Transfer Completion has been completed for a given module the module will automatically be disarmed The following examples illustrate the use of this query This queries the present arm state of module 7 The reply will be 1 if the module is armed or O if the mod
38. buffer fills to capacity and RS 232 is the active interface several possibilities exist depending on flow control arrangements The 1256 instrument supports either no flow control software flow control XON XOFF or hardware flow control CTS RTS Each scenario is described in more detail below If no flow control is selected the input buffer is full and additional commands are sent the buffer will accept characters as it makes space It is entirely possible therefore to have only parts of a message queuing to the input buffer This leaves unknown commands on the buffer that when parsed will generate errors For this reason if RS 232 communications are used without any flow control the user has the responsibility to insure that buffer overrun conditions do not occur If software flow control is selected and the input buffer reaches 80 capacity the 1256 will send an XOFF character to the host The 80 threshold provides a reasonable safety margin to allow for host software overhead When the input buffer reaches the 60 capacity threshold the 1256 will send an XON character to the host to resume data transfer If hardware flow control is selected and the input buffer is full the RTS signal from the 1256 will assert indicating to the remote host than no further characters will be received As soon as room exists in the input buffer the RTS signal will de assert indicating that room exists in the input buffer To make a flow con
39. certain time has passed OUTP DELay output trigger delay time This produces a delay from the time the relay closes till the trigger is felt The trigger is programmed in seconds with a resolution of 1 microsecond This is the resolution and not the accuracy That means that you will receive 0 00000 5 decimal places when you read it Any delay over 10 milliseconds rounds the delay to the nearest 10 milliseconds Advanced SCPI Operations 8 12 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Trigger In Trigger Out Trigger In Out Electrical Characteristics Logic levels TTL Trigger In Input Impedance 10 K ohms Trigger Out Drive Current Sink Source 4 mA Figure 8 2 External Trigger In and External Trigger Out Using Scan Lists and External Trigger Input Scan Lists Astronics Test Systems A scan list allows you to specify a list of switching commands to be performed Once you have defined this list the 1256 will automatically sequence through the scan list executing one command each time it detects a trigger pulse at the external trigger input of the SYNC TRIG connector Three types of commands may be entered into a scan list Close a specific relay Recall a state stored in a non volatile memory location Break stop scan list processing The 1256 may be programmed to sequence through a list of channels This feature is known as a Scan List When a Scan List i
40. closed since these are on the same include list as channel 0 Now if the command CLOSE 1 13 is executed the following actions occur A Channel 0 is opened since it is on an exclude list with channel 13 B Channels 1 2 3 4 10 and 12 are opened since they are on an include list with channel 0 C Channel 13 is then closed After power up and after a RST command has been executed all EXCLUDE lists are deleted You may provide an External Trigger In signal to control when the 1256 closes or opens relays Also the 1256 can provide an External Trigger Out signal to tell your equipment when the relays have settled after opening or closing These signals connect to the External Trigger In and External Trigger Out connectors on the 1256 rear panel Refer to Figure 8 2 Using External Trigger In and External Trigger Out for connector location and signal information The TRIGGER SOURCE command selects which source is used to trigger the scan list Each time a trigger is received from the selected trigger source the 1256 advances to the next element on the scan list The syntax for the TRIGGER SOURCE command is TRIGger SEQuence SOURCe BUS HOLD Advanced SCPI Operations 8 7 1256E User Manual Publication Number 980873 Rev A IMMediate EXT The possible trigger sources are BUS The GPIB bus trigger or the TRG command advances to the next scan list
41. command SYST KLOCK OFF will also display a remote operation screen however the fourth line will indicate a local option the user can activate by pressing the fourth line soft key To query the present lockout state SYST KLOCK will reply with either ON or OFF depending on the present state of the 1256 The 1256 operates in either automatic or manual user interface lockout mode In either case the 1256 will always power up in local mode In manual lockout mode the SYSTEM KLOCK ON command must be explicitly issued to prevent local operations In automatic lockout mode any remote command detected by the 1256 puts the instrument in remote mode with lockout mode automatically enabled To allow local access the 1256 must receive a SYSTEM KLOCK OFF command or experience a power cycle event To make a lockout election from the user interface select SETTINGS on the top most line select Type Display on the second line and Option Lockout from the third line and then choose the appropriate setting The default power up state of the instrument is automatic mode disabled To elect a different power up state this setting like all other menu options can be saved to non volatile memory For further details on front panel usage refer to Chapter 3 Using the Front Panel Controls Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Non Volatile Update Astronics Test Systems The syntax f
42. competitive source or used for manufacture by anyone other than Astronics Test Systems The information herein has been developed at private expense and may only be used for operation and maintenance reference purposes or for purposes of engineering evaluation and incorporation into technical specifications and other documents which specify procurement of products from Astronics Test Systems TRADEMARKS AND SERVICE MARKS All trademarks and service marks used in this document are the property of their respective owners e Racal Instruments Talon Instruments Trig Tek ActivATE Adapt A Switch N GEN and PAWS are trademarks of Astronics Test Systems in the United States DISCLAIMER Buyer acknowledges and agrees that it is responsible for the operation of the goods purchased and should ensure that they are used properly and in accordance with this document and any other instructions provided by Seller Astronics Test Systems products are not specifically designed manufactured or intended to be used as parts assemblies or components in planning construction maintenance or operation of a nuclear facility or in life support or safety critical applications in which the failure of the Astronics Test Systems product could create a situation where personal injury or death could occur Should Buyer purchase Astronics Test Systems product for such unintended application Buyer shall indemnify and hold Astronics Test Systems its officers employees su
43. controls 1 Press the top key Rotate the knob until the top line reads 2 Select line 2 next to top line by pressing the second key This selects line 2 so that you may select the type of setting to work Astronics Test Systems Computer Interfaces 4 3 1256E User Manual Publication Number 980873 Rev A gt Type Display lt Option Format Status Decimal 3 Select the remote interface settings mode by rotating the knob until line 2 reads as shown below lines 3 and 4 may differ eaten SETTINGS gt Type Remote lt Option Lockout Status Disabled 4 Press the third key to select line 3 of the display Rotate the knob until line 3 indicates the Source option as shown below aoe SETTINGS Type Remote gt Option Source lt Status GPIB 5 If line 4 of the display already indicates the status as TCP IP then the GPIB interface is already active no further action is necessary Otherwise press the fourth key Rotate the knob until line 4 indicates TCP IP LOL SETTINGS Type Remote Option Source lt Update TCP IP Then press the fourth key to confirm the update Pressing any other button cancels the change NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the sec
44. criteria the 1256 will display gt PATH CONTROL Select Filter Mask no paths found While selecting a mask pressing the line 1 key or line 4 key will institute other changes If a mask is selected that is not all wildcards the display will give the option to reset the mask PATH CONTROL gt PARKKOKKKKKKKKKKKKK ES Select Paths s lt Reset Mask By pressing the line 4 key all mask characters are reset to wildcards and the cursor position is returned to the first character Pressing the line 1 key will effectively abandon any changes made to the mask and revert back to the prior mask Description The Settings Menu provides control of the following options e Remote interface source TCP IP Ethernet GPIB or RS 232 e Local lockout during remote operations enabled or disabled e TCP IP Ethernet parameters such as TCP IP address gateway and sub net mask e RS 232 parameters such as baud rate and parity e GPIB address and SRQ settings e Display format hexadecimal decimal or binary Using the Front Panel Controls 3 17 1256E User Manual Publication Number 980873 Rev A e Display intensity brightness e Display screen saver enabled or disabled e Screen saver timeout in minutes Selecting the Remote Interface Source The user may control the 1256 remotely by the Ethernet GPIB or RS 232 interfaces To select one of these as the active interface follow these steps 1 Press the
45. for each port specified in the query If multiple ports are specified then multiple numeric values are returned In this case each number is separated from the next by a comma Examples are shown below Reads the index for port 4 of module 7 DIG SYNC INDEX 7 4 Reads the index for each of the ports 3 4 and 5 on module 7 DIGITAL SYNC INDEX 7 3 5 The reply will be similar to 123 14 79 This reply indicates that there are 123 bytes stored in port 3 14 bytes stored in port 4 and 79 bytes stored in port 5 Clearing Data from Data may be cleared from all synchronous input and output ports Synchronous Input with the DIGITAL SYNCHRONOUS CLEAR command This command does the following and Output Ports A Clears any data loaded into a synchronous output port B Clears any data read into a synchronous input port C Sets the Index for the output and input ports to O Examples of the command are shown below Clears module 7 synchronous input and output ports DIG SYNC CLEAR Q7 Clears modules 7 11 and the module assigned the name DIGIO DIG SYNC CLEAR 7 DIGIO 11 Astronics Test Systems Digital Module Operation 7 15 1256E User Manual Publication Number 980873 Rev A Synchronous The CLKIN input pin of the 1260 114 is used to clock synchronous Control and Status data into and out of the module Each time a clock edge is presented to this inp
46. lt Set to Open Then press the fourth key to open the relay Viewing Relay States It is easy to view the states of the relay channels on a switch plug in by using the OPERATIONS menu 1 Press the top key next to the display Rotate the knob until the top line reads OPERATIONS Select line 2 next to the top line by pressing the second key This selects line 2 OPERATIONS Slot 01 1260 121A Channel 0 Status Open Rotate the knob until line 2 shows the slot number of the plug in you wish to view This example uses slot 3 OPERATIONS gt Slot 03 1260 118 Channel O0 Status Open Press the third key to select line 3 of the display channel number Line 4 of the display shows the state of the channel 0 relay OPERATIONS Slot 01 1260 118 gt Channel 0 lt Status Open Rotate the knob one click to the right to view the state of the next relay channel channel 1 OPERATIONS Slot 01 1260 118 gt Channel 1 lt Status Closed Rotate the knob right or left to scan through the channels as desired Controlling a Digital Output Port The 1256 front panel provides control of the output ports of a digital I O plug in For connector pin assignments of a plug in refer to its user manual For example suppose a 1260 114TTL plug in is installed in slot 3 Also suppose that
47. of the SCPI STATUS commands STATus OPERation EVENt CONDition ENABle QUEStionable EVENt CONDition ENABle Examples of the commands are shown below To enable the Wait for Trigger and Wait for Arm bits the following command achieves this STAT OPER ENABLE 96 To read the value of the enable register STAT OPER ENABLE To read the value of the event register and clear the event register STAT OPER To read the value of the condition register STAT OPER COND These commands augment the IEEE 488 2 Common Commands to provide additional status information Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual SCPI Parameter Type Numeric Parameters Discrete Parameters Astronics Test Systems The SCPI language defines several different data formats to be used in program messages and response messages Commands that require numeric parameters will accept all commonly used decimal representations of numbers including optional signs decimal points and scientific notation TRIG DELAY 0 035 When a real non integer value is returned in a reply from the 1256 the floating point notation will be used The only non integer values returned from the 1256 correspond to the TRIGGER DELAY and the OUTPUT DELAY The values will be a number between 0 0 and 10 0 At mo
48. of the bits of the Operation Status Event Hegister are set This bit is NOT shown on the diagram For a description of the Operation Status Event Register consult the SCPI Status Registers section of this chapter MSS Master Summary Status Bit 6 bit weight 64 decimal 40 hexadecimal This bit is set when one or more of the enabled SCPI Command Basics 5 11 1256E User Manual SERVICE Register ENABLE Register SCPI Command Basics 5 12 Publication Number 980873 Rev A bits of the Status Byte are set In other words Status Byte bit 0 AND SRE bit 0 OR Status Byte bit 1 AND SRE bit 1 OR Status Byte bit 2 AND SRE bit 2 OR Status Byte bit 3 AND SRE bit 3 OR Status Byte bit 4 AND SRE bit 4 OR Status Byte bit 5 AND SRE bit 5 OR Status Byte bit 7 AND SRE bit 7 where the SRE is the Service Request Enable Register MAV ESB Event Summary Bit Bit 5 bit weight 32 decimal 20 hexadecimal This bit is set when one of the enabled Standard Event Status Enable Register bits is set The previous paragraphs describe the formation of the ESB bit Message Available Bit 4 bit weight 16 decimal 10 hexadecimal This bit is set when there is a message in the output buffer of the 1256 All other bits 8 2 1 and 0 of the Status Byte are not assigned and will always return 0 When the MSS transitions from a 0 to a 1 the GPIB SRQ interrupt is generated The MSS will remain 1 until a
49. opened channel 4 0 is closed C After the next trigger channel 4 0 is opened channel 4 1 is closed D After the next trigger channel 4 1 is opened channel 4 2 is closed E After the next trigger channel 4 2 is opened channel 5 8 is closed F After the next trigger channel 5 8 is opened channel 5 7 is closed G After the next trigger channel 5 7 is opened channel 5 6 is closed H After the next trigger channel 5 6 is opened channel 5 5 is closed After the next trigger channel 5 5 is opened and all channels defined for the path example are closed Module 7 channels 0 5 10 and 13 J After the next trigger all the channels defined for the path example are opened and channel 1 0 is closed K After the next trigger channel 1 0 is opened and the state of all channels controlled by the 1256 is recalled from nonvolatile memory The state of the relays is recalled from state location 14 L After the next trigger channel 1 224 is closed Note that the channels recalled from nonvolatile memory are NOT opened M After the next trigger channel 1 224 is opened and channel 1 323 is closed The scan list has wrapped around to the beginning of the list Each time the SCAN command is executed the previously defined scan list is deleted The present scan list may be deleted using the command SCAN DELETE command The presently defined scan list may be read using the
50. register Set the Service Request Enable register Read the Service Request Enable register Read the status byte Set the OPC bit of the Standard Event Status register Reply with 1 when executed used for synchronizing Send a trigger to the instrument over the bus Store relay states in non volatile memory Recall relay states from non volatile memory Read if any options are installed These commands are described in greater detail in this section of the manual SCPI Command Basics 5 6 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual IEEE 488 2 Status The IEEE 488 2 Status Reporting Model is shown in Figure 5 1 ae This figure shows how the status reporting data structures are Description implemented and the commands used to set and read each of the registers While the GPIB operational mode of the 1256 is fully compliant with this standard it is impossible for the 1256 or any instrument operating in the RS 232 operational mode for that matter to satisfy the IEEE status requirements in all respects A good example of non compliance relates to the SRQ SRQ is a feature that does not exist in RS 232 communications Astronics Test Systems SCPI Command Basics 5 7 1256E User Manual Pub lication Number 980873 Rev A Queue Not Empty
51. state of the relays in the system This command returns a reply of a sequence of 0 and 1 each of which are separated by a single ASCII space character The value of the reply is O if the corresponding relay is opened or 1 if the corresponding relay is closed The reply is one for one with the channel list For example assume channels for a particular relay module at module address 7 are numbered as follows Uv d Wo 3p od dU d GOS 13 1857204235 9o Qu Dub O Bl yos BS d This example module consists of 20 channels Suppose that only the following channels are closed while the remainder are open oy 207 31 The following examples show the replies to the CLOSE queries Command CLOSE 7 0 34 Reply 0 00 1 0 0 Q 202 0 0 1 09 0 OQ 0 01 O6 Q0 Command CLOSE 7 0 Reply 0 Command CLOSE 7 3 20 31 Reply The OPEN command may be used to open channels To say a channel is open means a The input of the channel is disconnected to the output Single Pole Single Throw b The input of the channel is disconnected from the normally Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Checking for Installed Plug ins Astronics Test Systems open output and connected to the normally closed output Single Pole Double Throw The syntax for the OPEN command is ROUTe OPEN channel list The format for a lt
52. the 1256 rear panel to the RS 232 serial port on the computer or data terminal Refer to Figure 4 3 Using the RS 232 Interface A suitable cable is available from Astronics Test Systems e RS 232 cable 10 ft 3 05 meter P N 602248 This cable has a DB 9 connector at each end The male connector connects to the 1256 and the female connector connects to the data terminal or computer If you wish to make your own cable Figure 4 4a provides the details Computer Interfaces 4 15 1256E User Manual RS 232 Connector Connecting to a Modem Computer Interfaces 4 16 Publication Number 980873 Rev A RS 232 Cable Figure 4 3 Using the RS 232 Interface If you wish to connect the 1256 directly to a modem instead of a computer or data terminal the connection will be DCE to DCE A DCE to DCE connection requires a special serial cable known as a null modem In a null modem cable the Received Data RxD and Transmitted Data TxD signals are reversed at one connector and the Clear to Send CTS and Request to Send RTS signals are also reversed at one connector This can be accomplished by constructing a special nine pin serial cable with the signals wired as shown in Figure 4 4b Using the 1256 with a Modem Note that the RS 232 connector at the 1256 is a 9 pin female D Subminiature DB 9 type Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual 9 PIN D SUB 9 PIN D SUB CONNECTOR CONNECTOR MA
53. the knob until line 2 of the display reads as follows STORE RECALL gt Type NVRAM lt Config Image Action lt select gt 3 Press the fourth key to select line 4 of the display If line 4 does not read Erase A11 then rotate the knob until it does STORE RECALL Type NVRAM Config Image lt Do Erase All 4 Press the fou Pressing any memory intac Using the Front Panel Controls 3 28 rth key bottom to erase the non volatile RAM other key cancels the operation and leaves the t Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual System Menu Complete Menu Listing Astronics Test Systems Description The SYSTEM menu allows viewing of system information This consists of the firmware revision numbers of the boot ROM and flash program This information may be valuable when contacting customer service to resolve a problem Viewing Firmware Revision Numbers To view the revision letters of the firmware follow these steps 1 Press the top key Rotate the knob until the top line reads SYSTEM lt 2 The display will appear similar to the following SYSTEM lt Firmware Revisions Boot Flash The third and fourth lines indicate the revision numbers of the boot ROM and the operating program that is currently stored in flash memory For quick reference this section lists t
54. troubleshooting a system Table 3 1 Accessibility of Features lists the features of the 1256 and indicates their accessibility via remote interface and front panel controls Table 3 1 Accessibility of Features Accessibility Remote Front Panel Feature Interface Controls Open Close Relays e Write View Digital Channels e e Select Remote Interface Set Ethernet Parameters Set GPIB Parameters e g address e Set RS 232 Parameters e g baud rate parity e Set Display Parameters e g brightness format e screen saver View Firmware Rev Letter e Work With Scan Lists Work With Include Lists Work With Exclude Lists Generate Trigger Out Pulse e Set Up Response To Trigger In Pulse e Save Recall Switch States flash memory e Save Recall Menu Preferences flash memory Astronics Test Systems Using the Front Panel Controls 3 1 1256E User Manual Publication Number 980873 Rev A Front Panel The front panel controls consist of four keypad switches pushbuttons a four line alphanumeric display and a rotary knob See Figure 3 1 Front Panel Controls The display contains four alphanumeric lines of text To the left of the display are the four keys each corresponding to one line of the display The keys select the display line to work with After selecting a display line the user may rotate the knob to change the parameter indicated on the selected l
55. used by the 1256 These bits will return a value of 0 when read The Operation Status Enable Register enables individual bits to pass through to the Operation Status Event Register The bits of the Operation Status Enable Register are ANDed with the bits of the Operation Status Condition Register If both bits are set then the corresponding bit in the Operation Status Event Register is set For example if bits 1 5 and 6 of the Operation Status Condition Register are set and bits 5 and 6 of the Operation Status Enable Register are set then bits 5 and 6 of the Operation Status Event Register will be set The Operation Status Event Register latches the status information Once a bit is set in the Operation Status Event Register it remains set until the bit is cleared by reading the register with the STATUS OPERATION EVENT query or by sending the CLS command When any of the bits of the Operation Status Event Register are set bit 7 of the Status Byte Register will be set The Questionable Status Register is not used by the 1256 When the Questionable Status Condition Register or Questionable SCPI Command Basics 5 21 1256E User Manual SCPI Command Basics 5 22 Publication Number 980873 Rev A Status Event Register are read they will return a value of 0 The Questionable Status Event Register may be programmed and queried but will have no effect on the operation of the 1256 The following SCPI command tree shows the syntax
56. used to read the data that has been previously loaded to a synchronous output port This command will return all of the data bytes up to 256 downloaded to the specified port The DIGITAL SYNCHRONOUS POINTS command is used to define the maximum number of data bytes that will be acquired for the specified synchronous input port This tells the 1256 how many data bytes to collect for the specified port s The value must be between 0 and 256 The DIGITAL SYNCHRONOUS POINTS query may be used to read the number of points defined for the synchronous input port s specified After power up and after executing a RST command the number of points to acquire for all ports is set to 0 Digital Module Operation 7 12 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Arming the Digital Modules Astronics Test Systems The DIGITAL SYNCHRONOUS INDEX query may be used to determine the number of data bytes stored in a synchronous input port s buffer This number will always be less than or equal to the maximum number of points for the port as specified with the DIGITAL SYNCHRONOUS POINTS command The DIGITAL SYNCHRONOUS STATE command is used to arm one or more 1260 114 digital modules These modules must be armed before they will respond to CLKIN pulses and perform the synchronous operations The command accepts one or more module numbers or module names Note that entire modules not individual ports
57. 0 Exclude Lists 5 18 EXE 5 9 Execution Error 5 9 firmware revision 5 16 flow control 5 25 5 26 front panel 2 3 5 41 fuse 2 1 GPIB 5 1 5 4 5 6 5 6 5 7 5 12 5 16 5 21 5 25 5 26 5 27 Astronics Test Systems GPIB interface 5 4 5 25 half duplex 5 5 IEEE 488 2 6 5 6 5 6 5 7 5 8 5 12 5 13 5 15 5 15 5 17 5 19 5 21 5 23 5 27 IMM 5 24 5 25 linefeed 5 4 5 5 5 26 lockout 5 42 manual lockout 5 42 Master Summary Status 5 11 MAV 5 12 5 27 Message Available 5 12 module name 5 19 5 29 5 30 5 31 5 32 5 33 5 36 8 20 8 21 MSS 5 11 5 12 5 15 5 16 non volatile memory 5 5 5 6 5 7 5 18 5 19 5 20 5 26 5 32 5 36 5 40 5 42 8 20 8 21 non volatile update 5 42 numeric parameters 5 23 OPC 5 6 5 10 5 16 5 27 OPEN 5 2 5 18 5 22 5 27 5 34 5 38 Operation Complete 5 10 5 16 Operation Status Enable Register 5 13 5 22 Operation Status Event 5 11 5 13 5 22 Operation Status Event Register 5 11 5 13 5 22 OSE 5 11 path name 5 19 5 33 5 34 5 35 5 36 5 43 PON 5 9 5 10 5 11 Power On 5 9 5 18 Index 1 Query Error 5 10 Questionable Status Enable Register 5 13 Questionable Status Event Register 5 13 5 22 QYE 5 10 5 11 5 27 recall 5 19 Reply Output Buffer 5 27 Request Control 5 10 ROUTE 5 1 5 2 5 3 5 4 5 18 5 25 5 31 5 35 RQC 5 10 RS 232 2 6 5 4 5 5 5 6 5 6 5 7 5 25 5 26 RS 232 int
58. 0r Plug In IOUS et UT 2 3 Connecting to PIUG LAS doo ic c sae Sea A teen ee ae e LA Ge cl 2 4 Activating Main AG POWER entes pete ate ptu fefto fette ee te E e 2 4 Sel TeSl etes eemper aR tetuer ae mt M Re d iu 2 5 Verifying the Installed PIugslrs ee ore Ate Em Re Eoo EE PU Er cR rae D eae uo aes 2 5 MNOS UCD a Heldy canc LM IM ML MM mM MM MA M 2 6 Opening a Relay PUN dina 2 7 IivGase on Trouble sust aaa Meet eal ieee cuado Ota aa eee 2 7 Switching and Heat Disipador 2 8 E A AA AAAA TAA EAN 3 1 USING THE FRONT PANEL CONTROLS 2 3 prone italia 3 1 INTO HON RES 3 1 igiene 3 2 Understanding the Hierarchical Me nu cccceeeeeeeeeeeeeeeeeeeeeeeeeneaaaeaaeaaeeeeeeeeeeeessaaaeeeeeees 3 2 The Eve Menus x cect ent contest dni 3 7 Astronics Test Systems i 1256E User Manual Publication Number 980873 Rev A Operations Meneses 3 8 Closing a RELAY ace er e e tud ete deer i ede qur etes red mr Feo eR tede pa e 3 8 Pally COnUOl Men tie cnet PTT ladies 3 13 Viewing Palli SIate5 ida 3 15 S TRIOS ICI wc C 3 17 Store Recall Memes sca te e ee ai dra 3 25 SySLO Mel used coruscat tes otc tta oreste totu LG ect Lauf latest latch ented 3 29 Complete Menu Listing visitara ts 3 29 GIAO a 4 1 SOMPUTERINTERRA CES santa a e add 4 1 Iritroduetiolise s EE Seer e dd e a e ar dated 4 1 COMMANAS PE EM p Daan aa Sure rae pa 4 1 Using the Ethernet Interface 22 eodera detta aa ene e abate adie ae 4 2 Basic Ethennet
59. 1 1256E User Manual Publication Number 980873 Rev A 25 50 75 100 Screen Saver Enabled Disabled Timeout 1 min 5 mins 10 mins 15 mins 30 mins 45 mins 1 hr STORE RECALL State Defaults Recall Power Up Store Recall Preset 1 to 100 Store Recall Non Volatile RAM Image Erase All Update Menu Defaults Recall Power Up Store Recall SYSTEM Firmware Revisions Boot Boot ROM version Flash Flash program version Device ID Number Unique 8 digit 1256 ID number Using the Front Panel Controls 3 32 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Chapter 4 COMPUTER INTERFACES Introduction Commands Astronics Test Systems The 1256 Switching System provides the following remote interfaces for controlling the 1256 e TCP IP Ethernet Transmission Control Protocol Internet Protocol TCP IP is a local area network LAN standard that operates over long distances The 1256 supports 10Base T 10 M bit s and 100Base TX 100 M bit s Ethernet networks e EEE 488 Also known as the General Purpose Interface Bus GPIB IEEE 488 is commonly used in test and measurement applications e RS 232 Originally developed for modems and data terminals the RS 232 interface is now common for controlling a wide range of products The remote interface allows computers to access the operating features of the 1256 by sending commands manually or automatically via a computer program
60. 1 top line of the display This selects the top line OPERATIONS Slot 01 1260 121A Channel 0 Status Open Next rotate the knob until the desired menu title is displayed on line 1 The following sections discuss in detail how to use these menus Description The Operations Menu provides direct control of switching and digital I O plug ins It allows the following operations e View the states of the relays closed or open on a switching plug in e Close or open a relay on a switching plug in e View the logic state of a digital input or output port on a digital I O plug in e Change the logic state of a digital output port on a digital I O plug in Closing a Relay The 1256 front panel enables the user to manually close and open relays on switch plug ins For connector pin assignments of a plug in refer to its user manual For example suppose a 1260 118 plug in is installed in slot 3 To close relay channel 4 on this plug in proceed as follows 1 Press the top key next to the display This selects the top display line so that you can change it The selection markers gt and lt appear on the line to indicate that it is selected Rotate the knob until the top line reads Using the Front Panel Controls 3 8 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual gt OP ERAT ONS Select line 2 next to the top line
61. 38 e gt OPERATTIONS Doc gt Slot 02 1260 138 lt a E Channel 0 do Status Open Using the Front Panel Controls 3 4 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual 7 Rotate the knob one more click to the right Line 2 now shows the contents of slot 3 1260 120 plug in Y OPERATIONS gt Slot 03 1260 120 lt e n Channel 0 d Status Open 8 Press the third keypad switch corresponding to line 3 of the display This selects line 3 so that the relay channel can be selected Y S OPERAT LONSS Ee Slot 03 1260 120 e fj gt Channel 0 e Status Open 9 Rotate the knob to the right As the knob rotates the channel number indicated by line 3 increments upward Stop when the channel number reaches 2 o 0BPERATIONS 3 Tors Slot 03 1260 120 O T 2Channel 2 ei Status Open Astronics Test Systems Using the Front Panel Controls 3 5 1256E User Manual Publication Number 980873 Rev A Line 4 shows the status of the channel 2 relay on the 1260 120 plug in 10 Press the fourth keypad switch corresponding to line 4 of the display o OPERATIONS Dou Slot 03 1260 120 e ei _ Channel 2 O gt Status Open lt 11 Rotate the knob one click to the right to view the next choice for the relay status OPER
62. 4 Computer Interfaces Setting the Display Format The display may be set to display digital port data in hexadecimal decimal or binary format To set the display format proceed as follows 1 Press the top key Rotate the knob until the top line reads cec SETTINGS lt 2 Select line 2 next to top line by pressing the second key Rotate the knob until line 2 of the display reads Type Display HS SETTINGS gt Type Display lt Option Intensity Status 75 3 Press the third key to select line 3 of the display option Rotate the knob until line 3 of the display reads as follows mc y SETTINGS Type Display Option Format Status Hex 4 If line 4 already shows the desired format then no further action is necessary Otherwise select line 4 Then rotate the knob until line 4 shows the desired format This example Using the Front Panel Controls 3 21 1256E User Manual Using the Front Panel Controls 3 22 Publication Number 980873 Rev A uses Binary ae SETTINGS Type Display Option Format lt Update Binary Then press the fourth key bottom to update the status Pressing any other key cancels the change NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section S
63. 6 RX Pin 6 RX Pins 4 5 7 8 Unused To connect the 1256 directly to the RJ 45 port on a computer use a CAT 5 cable that is made in a crossover or reverse configuration Connector 1 Connector 2 Pin 1 TX Pin 3 RX Pin 2 TX Pin 6 RX Pin 3 RX Pin 1 TX Pin 6 RX Pin 2 TX Pins 4 5 7 8 Unused Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual To maximize the data transfer rate of an Ethernet based system e Use CAT 5 compliant cable e Avoid sharp bends or kinks in the cable e f the main network used to connect the 1256 or other Ethernet enabled test equipment is highly congested consider isolating the test system computers and Ethernet enabled test equipment into sub networks This can be accomplished by using a network switch as opposed to an ordinary hub The switch will keep unrelated traffic off the sub network and therefore reduce congestion Connecting the Use a Cat 5 Ethernet cable to connect the rear panel RJ 45 TCP IP Ethernet connector on the 1256 to the RJ 45 TCP IP port Ethernet Cables of the host computer Refer to Figure 4 1 Connecting the Ethernet Interface To Ethernet Connector TCP IP Ethernet Connector CAT 5 Ethernet Cable Figure 4 1 Connecting the Ethernet Interface Selecting the Before using the Ethernet interface to control the 1256 you must Ethernet Interface select the Ethernet interface via the front panel
64. 7 and port 3 of module 8 DIG OUTP STATE 7 0 8 3 ON Enable ports 1 through 4 and port 6 of module 7 and ports 2 through 10 of module 8 DIG OUTP STATE 7 1 4 6 8 2 10 1 Disable port 3 of the module whose name is digio DIG OUTP STATE digio 3 off The syntax for the asynchronous mode commands is shown below DIGital OUTPut DATA lt port list gt lt data list gt INPut lt port list gt Digital Module Operation 7 5 1256E User Manual Publication Number 980873 Rev A The DIGITAL OUTPUT command is used to output data to one or more ports on the 1260 114 modules The lt port list gt defines which port or ports to be written The lt data list gt is a list of comma separated numeric values each of which is in the range 0 to 255 The number of data bytes in the lt data list gt must agree with the number of ports specified in the lt port list gt Examples of this command are shown below Output the data value 38 decimal to port 0 of module 7 DIG OUTP 7 0 38 Output data value 55 hex 85 decimal to port 0 and AA hex 170 decimal to port 3 of module 7 DIG OUTP 7 0 3 H55 HAA Output the value O to port O 1 to port 1 2 to port 2 and so on Data is output to each of the 12 ports on the module whose name has been defined as digio DIG OUTPUT digio 0 11 0 1 2 3 4 5 6 17 87 97105 LL Output the
65. 873 Rev A Non Volatile Memory PROBLEM POSSIBLE CAUSES WHAT TO DO Switch states or menu e Switch states and menu e After saving switch states or settings that have been settings must be saved ina menu preferences to the saved to non volatile memory two step process image save the image to non are lost the next time power 1 Save to the non volatile volatile memory before turning is turned on memory image located power off see Chapter 3 in SRAM Using the Front Panel Controls under the heading 2 Save the image to non Store Recall Menu volatile memory The reason for this implementation is that non volatile memory is inherently much slower than SRAM By saving the image to non volatile memory just one time instead of performing a separate block write for each piece of data the slow non volatile write cycle is encountered just once Troubleshooting C 6 Astronics Test Systems 1256 User Manual INDEX AC power 2 1 2 2 automatic lockout 5 42 bus trigger 5 21 CLOSE 5 2 5 3 5 4 5 18 5 22 5 27 5 28 5 29 5 30 5 31 5 34 5 36 5 37 5 38 5 38 CME 5 9 Command Error 5 9 Command Input Buffer 5 25 command set 5 14 5 15 controls 2 5 2 6 CTS 5 26 DDE 5 9 DEFINE 5 3 5 29 5 32 5 32 5 33 5 35 5 36 5 36 Device Dependent Error 5 9 discrete parameters 5 24 EOL 5 5 error code 5 21 5 40 error message 5 9 5 10 5 17 5 27 5 4
66. A sTRONICS TEST SYSTEMS RACAL INSTRUMENTS 1256E SWITCHING SYSTEM PUBLICATION NO 980873 Rev A Astronics Test Systems Inc 4 Goodyear Irvine CA 92618 Tel 800 722 2528 949 859 8999 Fax 949 859 7139 atsinfo astronics com atssales astronics com atshelpdesk asironics com _http www astronicstestsystems com Copyright 2002 by Astronics Test Systems Inc Printed in the United States of America All rights reserved This book or parts thereof may not be reproduced in any form without written permission of the publisher THANK YOU FOR PURCHASING THIS ASTRONICS TEST SYSTEMS PRODUCT For this product or any other Astronics Test Systems product that incorporates software drivers you may access our web site to verify and or download the latest driver versions The web address for driver downloads is http Awww astronicstestsystems com support downloads If you have any questions about software driver downloads or our privacy policy please contact us at atsinfo astronics com WARRANTY STATEMENT All Astronics Test Systems products are designed to exacting standards and manufactured in full compliance to our AS9100 Quality Management System processes This warranty does not apply to defects resulting from any modification s of any product or part without Astronics Test Systems express written consent or misuse of any product or part The warranty also does not apply to fuses software non rechargeable batteries damage
67. ATIONS Slot 03 1260 120 Channel 2 Set to Closed On the fourth line the 1256 asks whether to close the relay channel 12 Press the fourth keypad switch to confirm that the relay channel should be closed press any other key to cancel The display then shows the updated relay status o OPERATIONS UNUS Slot 03 1260 120 e dao Dd Channel 2 d Status Closed Using the Front Panel Controls 3 6 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual The Five Menus Astronics Test Systems In the above example the user starts at the top of the menu hierarchy and proceeds downward through the following levels Level 1 Menu type OPERATIONS PATH CONTROL SETTINGS STORE RECALL SYSTEM This example used OPERATIONS Level 2 Slot number or class Selects the switch plug in to control or generic menu class Level 3 Channel number or option Selects the relay channel to control or generic menu option Level 4 Status Shows whether the relay is open or closed or the state of the present menu option and lets the user change the status or state of the menu option The above example illustrates that the user interface has a hierarchical menu structure The top line shows the top level of the menu The second third and fourth lines show successively lower levels of the hierarchy Some menus do not use all four lines of the display When a line is
68. An example firmware revision is 3 10 A sample is shown below Racal Instruments 1256 Switch System 3 10 RST Command The RST command resets the instrument to its power on default state These settings are shown in Table 5 1 of this manual This command does NOT change the value of SCPI Operation or Questionable status registers or IEEE 488 2 status registers condition registers or enable registers This command does NOT clear the error message queue the input command buffer or the output reply buffer Table 5 1 Power On and Reset State Related Command s Reset State Relay States The states are recalled from non volatile memory location O power up state As shipped from the factory these are all in the OPEN position n N U PU Teu CUAD Y Include List No Include Lists Defined E DE R ST D ON OUTE INCL Astronics Test Systems SCPI Command Basics 5 17 1256E User Manual TST Query RCL Command SAV Command SCPI Command Basics 5 18 Publication Number 980873 Rev A The TST query is supported only to be compliant with the IEEE 488 2 standard The 1256 performs an extensive self test at every power up If the system detects any failures the condition is indicated directly on the front panel display Normally self test errors are considered to be fatal conditions and result in a system halt
69. C STATE 7 ON After this operation is complete generate 256 clock pulses on the CLKIN input line of module 7 Reads whether module 7 is still armed If the reply is 1 then the module is still armed expecting more CLKIN pulses If the reply is 0 then the module is disarmed Digital Module Operation 7 17 1256E User Manual Publication Number 980873 Rev A DIG SYNC STATE 7 Read the data bytes captured by port 2 during the synchronous test The reply will be a set of 5 data bytes in decimal format separated by commas DIG SYNC DATA 7 2 Read the data bytes captured by port 3 during the synchronous test The reply will be a set of 256 data bytes in decimal format separated by commas DIG SYNC DATA 7 3 Digital Module Operation 7 18 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Chapter 8 ADVANCED SCPI OPERATIONS Introduction Using ROUTE CONFIGURE to Control Switching Sequence Astronics Test Systems The 1256 Switching System offers a number of advanced functions to give you precise control over the instrument These functions can be accessed only via the IEEE 488 GPIB and RS 232 interfaces The ROUTE CONFIGURE command controls the sequence in which relays are opened and closed when more than one relay has been commanded to change The command has the form ROUTE CONFIGURE lt module address gt lt seqmode gt
70. E lists are deleted The 1256 provides the capability to define sets of relays which are mutually exclusive This feature is called an exclude list When one relay on an exclude list is closed all others in the exclude list are opened This prevents two relays in an exclude list from being closed simultaneously This feature can be used to ensure two or more relays are not shorting system resources such as power supplies together A channel may reside on at most one exclude list An attempt to place a channel on a second exclude list results in an error The error is placed on the error queue and may be read using the SYSTEM ERROR query A channel cannot be on an include list with another channel if it is also on an exclude list with that second channel That is the Advanced SCPI Operations 8 5 1256E User Manual Publication Number 980873 Rev A following definitions result in an error INCLUDE DEF 1 0 10 EXCLUDE DEF 1 0 11 15 6 The error occurs because channels 1 0 and 1 6 are on an include list together and they are on an exclude list together This creates a conflict since an attempt to close channel 1 0 would attempt to close channel 1 6 due to the include list association but would be prevented from doing so by the exclude list The syntax for defining an exclude list is shown below ROUTe EXCLude lt channel list gt EXCLude channel list
71. IB interface a command string sent to the 1256 must be terminated with one of the following 1 An ASCII linefeed character decimal 10 hex OA or a character n 2 The last character with the EOI signal asserted 3 An ASCII linefeed character with the EOI signal asserted For commands sent through the RS 232 interface several different rules apply Generally speaking the RS 232 interface can be accessed a number of different ways that directly impact the termination method 1 An ASCII linefeed character decimal 10 hex OA or a character n 2 An ASCII carriage return decimal 13 hex OD or a character Ar 3 An ASCII carriage return character followed by a linefeed character Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual IEEE STD 488 2 Common Commands Astronics Test Systems Because of the wide variability in termination schemes in serial mode the 1256 must be configured through the front panel user interface to indicate whether it should expect carriage returns only linefeeds only or carriage returns followed immediately by linefeeds To make a termination election select SETTINGS on the top most line select Type RS 232 on the second line and Option EOL Mode from the third line and then choose the appropriate setting The default power up state of the instrument is linefeed only To elect a different power up state this setting like all other menu options ca
72. IBLE CAUSES WHAT TO DO Unit does not turn on fan not Not connected to proper e Make sure that the 1256 is running blank display and power source connected to a live power no indicator lights source using a functional power cord For input power requirements see Chapter 2 Getting Started under the heading Main AC Power e Fuse missing blown or Check fuse verifying that it has incorrectly installed the required capacity as marked on the 1256 rear panel Make sure the fuse is properly installed see Chapter 2 Getting Started in Figure 2 1 Changing Fuse for Main AC Power Astronics Test Systems Troubleshooting C 1 1256E User Manual Publication Number 980873 Rev A Front Panel Controls PROBLEM POSSIBLE CAUSES WHAT TO DO Display goes blank e Power has been e Verify that the 1256 AC input is was working interrupted connected to a live mains outlet Verify that the 1256 power switch is still in the ON position e 1256 screen saver has Screen saver activation is been activated normal after a period of no front panel control activity To restore the display press any key on the front panel To increase the delay time or disable the screen saver refer to Chapter 3 Using the Front Panel Controls under the Settings heading Note that leaving the screen saver enabled maximizes the life of the fluorescent display No response to front panel e Key is not currently Read display options carefully
73. If you wish to change additional switch or menu settings and store them in non volatile RAM you may want to save time by storing all changed settings into the temporary SRAM first and then copy the temporary RAM image to non volatile RAM just once Astronics Test Systems Using the Front Panel Controls 3 27 1256E User Manual 6 Select line 2 key Rotate t Publication Number 980873 Rev A next to the top line by pressing the second he knob until line 2 of the display reads as follows STORE RECALL gt Type NVRAM lt Config Image Status Erase 7 Press the fourth key bottom to select line 4 of the display Rotate the knob until line 4 reads STORE RECALL Type NVRAM Config Image lt Do Update 8 Press the fourth key again to copy the desired power up state into non the change volatile RAM Pressing any other key cancels Erasing Non Volatile RAM The entire non volatile RAM may be erased if desired This erases all presets including switching states the power up switching state and the men set to the factory de u preferences The menu preferences will be faults To erase the entire non volatile RAM proceed as follows 1 Press the top the top line re key next to the display Rotate the knob until ads gt STORE RECALL 2 Select line 2 next to the top line by pressing the second key Rotate
74. In this condition communication activity ceases For this reason communications only function if self test passes and therefore a TST will always report a value of 0 indicating a successful self test The RCL command will recall the relay states from non volatile memory The RCL command may specify a non volatile memory location from which to recall the instrument state That is both of the following formats are accepted RCL RCL location If location is specified it must be in the range O to 100 If location is not specified it will default to 100 Location 0 has a special purpose This location is used by the 1256 at power up to set the initial relay states The RCL command recalls the states of all relays in the system The relay states are stored using the SAV command Note that path names module names status registers include lists and so on are NOT affected by the RCL command The SAV command will prepare to store a given state into non volatile memory The actual process of updating non volatile memory for this command requires a separate SYSTEM NVUPD command This allows multiple relay states path names module names relay verification flags and verification masks to be updated in rapid succession followed by a single slower update of the actual non volatile memory The SAV command accepts one of two formats SAV SAV location If location is specified it must be in
75. LE FEMALE STRAIGHT THROUGH NINE PIN RS 232 CABLE CONNECT TO 1256 CONNECT TO COMPUTER CABLE CONNECTIONS PIN 2 RXD PIN 2 RXD PIN 3 TXD PIN 3 TXD PIN 7 RTS PIN 7 RTS PIN 8 CTS PIN 6 CTS PIN 5 SIGNAL GND PIN 5 SIGNAL GND Figure 4 4a Using the 1256 with a Computer 9 PIN D SUB 9 PIN D SUB CONNECTOR CONNECTOR MALE MALE SPECIAL NINE PIN RS 232 CABLE CONNECT TO 1256 CONNECT TO MODEM CABLE CONNECTIONS PIN 3 TXD PIN 3 TXD PIN 8 CTS PIN 8 CTS PIN 5 SIGNAL GND PIN 5 SIGNAL GND Figure 4 4b Using the 1256 with a Modem Astronics Test Systems Computer Interfaces 4 17 1256E User Manual Selecting the RS 232 Interface Computer Interfaces 4 18 Publication Number 980873 Rev A To use the RS 232 interface with the 1256 the RS 232 interface must be selected via the front panel controls as follows 1 Press the top key Rotate the knob until the top line reads SETTINGS lt 2 Select line 2 next to top line by pressing the second key This selects line 2 so that you may choose the type of setting to work with sea SETTINGS gt Type Display lt
76. Option Format Status Decimal 3 Rotate the knob until line 2 reads as shown below lines 3 and 4 may differ ia SETTINGS gt Type Remote lt Option Lockout Status Disabled 4 Press the third key to select line 3 of the display Rotate the knob until line 3 indicates the Source option as shown below 55 SETTINGS Type Remote Option Source lt Status GPIB 5 If line 4 of the display already indicates the status as RS 232 then the RS 232 interface is already active no further action is necessary Otherwise press the fourth key Rotate the knob until line 4 indicates the RS 232 interface SSS SETTINGS Type Remote Option Source lt Update RS 232 Then press the fourth key to confirm the update Pressing any other button cancels the change NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Setting the Flow Control Option Astronics Test Systems Description Flow control is a means by which the data terminal
77. Plug In Slots Power Switch RS 232 AC Input Fuse Cover Trigger In Ethernet 120V 230V 47 63 Hr 150 VA MAX l jao fabs OE e PAP Fuse rance TYPE LEAT 250v 90v 260V m X 20e ala Trigger Out GPIB Figure 1 3 1256 Features Rear Panel 15 60 Figure 1 4 Dimensions Astronics Test Systems Introduction 1 3 1256E User Manual Powerful Software Introduction 1 4 Publication Number 980873 Rev A The 1256 provides extensive software capabilities including Exclude Lists Allows you to prevent simultaneous closure of switches in a specified group The switches are then mutually exclusive Equate Lists Reduces programming effort When two or more modules are on an equate list they respond simultaneously to a command sent to any of them External Trigger Input Allows an external device to trigger switching operations The external device connects to the External Trigger In connector External Trigger Output Provides a pulse on the External Trigger Out connector to trigger an external device such as a DMM after the relay states have changed Scan Lists Allows you to specify a sequence of relay closures to step through in response to an external trigger source A scan list may include relays on one module or multiple modules Programmable Delay Allows you to specify the amount of time delay from a relay state change to an external trigger pulse Verification Allows you to ver
78. Q bit is set until it is read once and cleared after The OPC command will cause the Operation Complete bit of the Standard Event Status Register to be set when the command is executed This is bit O of the register This command could be used to cause an interrupt if bit O of the Standard Event Status Enable Register is set and bit 5 of the Service Request Enable Register is set This provides a means of synchronizing the application program with the 1256 and ensuring that all commands have been parsed and executed before continuing execution of the application program The OPC command has no parameters The only valid syntax for this command is OPC The OPC query causes the 1256 to reply with the value of 1 when the query is executed This query may be used to ensure that all previous commands have been executed so the application program may be sure that relays have been programmed to their desired states before continuing execution of the application program Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual IDN Query This query requests the instrument to identify itself The EMS responds to this query with the following reply Racal Instruments 1256 Switch System lt revision gt This reply indicates the company brand of the instrument is Racal Instruments that it is a 1256 Switch System and the current firmware revision The firmware revision is a numeric floating point value
79. RIGGER SOURCE will return the reply IMM NOT IMMEDIATE Boolean parameters represent a single binary condition that is either true or false The 1256 accepts OFF or 0 for a false condition The 1256 accepts ON or 1 for a true condition The following command uses a boolean parameter ROUTe MONitor STATe OFF ON O 1 The following commands turn the monitor OFF ROUTE MONITOR STATE OFF ROUTE MONITOR STATE 0 MON OFF MON 0 The following commands turn the monitor ON ROUTE MONITOR STATE ON ROUT MON STAT ON MON 1 When Boolean parameters are queried the 1256 always replies with a 1 if the state is on or O if the state is off The keywords ON and OFF are NOT returned in the reply to ROUTE MONITOR STATE or any other query Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Command Input Buffer Astronics Test Systems The 1256 uses a command buffer to store commands sent either through the RS 232 or GPIB interfaces The input buffer is 1024 characters in length If the input buffer fills to capacity and the GPIB interface is the active interface the NRFD signal is asserted on the GPIB bus This indicates to the system controller that the 1256 is not able to accept more data until it parses existing commands and clears space in the input buffer If the input
80. SCAN command For example if the scan list shown for the example Advanced SCPI Operations 8 16 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Advance Verification Features Confidence Mode Astronics Test Systems above is presently defined the query SCAN will generate the reply C1323 91052 101825 example 1 0 statel4 1 224 The reply will NOT include module names even if the SCAN command used to define the list included module names Module numbers are always used when replying to the SCAN query In some applications it may be desirable for the reason of reliability to confirm that switches are actually closed or open based on the commanded state of the system The 1256 provides the user with capabilities to detect certain types of switching failures From the standpoint of the 1256 switching failures fall into one of two classes detectable and undetectable An example of an undetectable failure is where a relay contact has welded closed through misuse In this example the relay coil voltages will verify properly even though the contact has suffered permanent damage There is no easy way to detect this condition without invasively monitoring the switched side of the relay This obviously would defeat the isolation characteristics of a relay The other class of failures those that are detectable include coil and driver failures The 1256 switching system offers two me
81. SOURCE command is used to select the input trigger C Program the 1256 to generate a trigger each time a relay is closed The output trigger must be enabled through the OUTPUT TRIGGER command D Program the DMM or other instrument to select an output trigger source The output trigger source should be the input trigger source of the 1256 as indicated in step B above E Program the DMM to select an input trigger source The input trigger source should be the output trigger line of the 1256 as indicated in step C above F Program the DMM to select a trigger count which sets the number of channels to scan through G Program the DMM to select the number of readings to store H Send the command TRIGGER IMMEDIATE to the 1256 to initiate the Scan operation Repeatedly query the DMM to wait until the measurements have completed J Read the measurements from the DMM The commands used to program the DMM or other instrument depend on the instrument being used Consult the user documentation of the instrument for a description of how to perform steps D E G J and K above The remainder of this section describes how to define a scan list select input and output trigger sources and so on Advanced SCPI Operations 8 14 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Defining a Scan List A Scan List may be defined using the SCAN command The Astronics Test Systems syntax for
82. Systems Publication Number 980873 Rev A 1256E User Manual Astronics Test Systems the four octets one at a time 1 Press key 3 to select line 3 Rotate the knob until line 3 appears as follows line 4 may differ Mee SETTINGS Type TCP IP Option GW Oct 1 Status 0 This prepares the 1256 to set the first octet eight bits of the gateway 2 Select line 4 and rotate the knob until line 4 displays the first octet of your desired gateway Then press key 4 again to confirm 3 Proceed with the remaining octets of the gateway until all four are set Setting the Sub Net Mask The subnet mask in like manner as the IP address and gateway is comprised of four octets Set the gateway by entering the four octets one at a time 1 Press key 3 to select line 3 Rotate the knob until line 3 appears as follows line 4 may differ gt SETTINGS Type TCP IP gt Option NM Oct 1 lt Status 0 This prepares the 1256 to set the first octet eight bits of the sub net mask 2 Select line 4 and rotate the knob until line 4 displays the first octet of your desired sub net mask Then press key 4 again to confirm 3 Proceed with the remaining octets of the sub net mask until all four are set Re enabling TCP IP Communications After setting the address gateway and net mask you must re enable TCP IP communications before the 1256 can use the Ethernet interface 1 Ens
83. TAL CONFIGURE command This command has the following syntax DIGital CONFigure lt port gt Examples of this command are shown below To set all ports of the 1260 114 module with address 7 to the asynchronous mode of operation DIG CONF 7 0 To set ports 0 through 3 to the synchronous mode and ports 4 through 11 to the asynchronous mode DIG CONF 7 12 DIG CONF 87 4 To read the presently selected mode of operation for port 10 on module 7 issue the following command The reply returns SYNC if it is synchronous or ASYN if it is asynchronous DIG CONF 7 10 Astronics Test Systems Publication Number 980873 Rev A Enabling and Disabling the Ports Using the Asynchronous Mode of Operation Astronics Test Systems 1256E User Manual The DIGITAL OUTPUT STATE command is used to enable or disable the output drivers on one or more ports of the 1260 114 module The 1260 1140C and 1260 114HVOC modules have open collector outputs and so this command has no effect This command affects the ports used in either the synchronous or the asynchronous mode of operation The command uses the syntax DIGital OUTPut STATe port list ON OFF 1 0 Examples of the command are shown below Enable port 11 of module 7 as an output DIG OUTP STATE 87 11 ON Disable ports 3 and 6 of module 7 DIG OUTP STATE 7 3 6 OFF Enable port 0 of module
84. TION The 1256 may be used to control the 1260 114TTL 1260 114CMOS 1260 1140C and 1260 114HVOC digital modules These modules may be programmed to work in either the synchronous or asynchronous modes of operation The modules may be programmed to operate in a combination of the two modes with some ports operating in the asynchronous mode and some ports operating in the synchronous mode The 1260 114 modules are programmed at the port level A port is a set of 8 consecutive input output pins Data is written to the ports in 8 bit bytes The 1260 114TTL 1260 114CMOS and 1260 1140C modules consist of twelve 8 bit ports for a total of 96 input output pins In the case of the 1260 114HVOC card it consists of six 8 bit ports For the TTL CMOS versions of the 1260 114 each port may be defined as an input or an output All 8 pins of an output port will be enabled to output data when the port is enabled Data may be read from an output port but data written to an input port will not appear on the signal pins The open collector versions of the 1260 114 are generally thought of as output only modules If an output bit is turned off high impedance state such that the 1260 114 is not actively pulling a signal low reading the port will return the present signal level It is possible therefore to determine whether something else is driving the system and whether the signal is either high or low when referenced to CMOS levels When
85. The error is placed on the error queue and may be read using the SYSTEM ERROR query The syntax for defining an include list is shown below ROUTe INCLude channel list INCLude channel list DELete channel list ALL The following examples illustrate the use of this command to define include lists INCLUDE 3 5 15 CLOSE 3 5 This first command places two relays on the include list Channels 5 and 15 of the module with address 3 are included together The second command closes channels 5 AND 15 on the module with address 3 INCLUDE 3 12 8 0 OPEN 68 0 The first command places channel 12 from module 3 and channel O from module 8 on an include list The second command opens both channel 6 from module 3 and channel 0 from module 8 INCLUDE 3 5 16 19 7 0 5 6 9 12 17 This command groups the following relays on a single include list Module 3 channels 5 16 17 18 and 19 Module 7 channels 0 1 2 3 4 and 5 Module 6 channels 9 10 11 12 and 17 Advanced SCPI Operations 8 2 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Any command which opens any of these relays will open all of them and any command which closes any of these relays will close all of them MOD DEF power 3 MOD DEF matrix 5 PATH DEF thispath 8 0 4 12 power 14 INCL power 15 matrix 323 thispath The
86. User Manual IEEE 488 GPIB Remote Interface PROBLEM POSSIBLE CAUSES WHAT TO DO 1256 does not respond to e 1256 is not set for remote e Use front panel controls to set GPIB commands GPIB operation the 1256 for GPIB operation See Chapter 4 GPIB AND RS 232 INTERFACES under the heading Selecting the GPIB Interface e Commands sent to wrong Make sure that the commands GPIB address are sent to the GPIB address currently assigned to the 1256 to set the 1256 GPIB address see Chapter 4 GPIB and RS 232 Interfaces under the heading Setting the GPIB Address e The 1256 is set to the Make sure that the 1256 is set same GPIB address as to a unique GPIB address to another device in the set the 1256 GPIB address system see Chapter 4 GPIB and RS 232 Interfaces under the heading Setting the GPIB Address Plug In Modules PROBLEM POSSIBLE CAUSES WHAT TO DO Slot containing a plug in is e Plug in not properly seated Loosen the retaining screws of indicated as an empty slot in slot the plug in Pull the plug in when using front panel part way out then gently push controls to scroll through it back in until it stops Then slots press it firmly to seat its connector with the backplane connector When properly installed the panel of the plug in is flush with the rear panel of the 1256 Astronics Test Systems Troubleshooting C 5 1256E User Manual Publication Number 980
87. ables the user to manually close and open pathnames For example suppose four pathnames have been defined using the remote interface for a combination of different relays and plug in cards PATH1 PATH2 PATHS and PATH4 1 Press the top key next to the display This selects the top display line so that you can change it The selection markers gt and appear on the line to indicate that it is selected Rotate the knob until the top line reads gt PATH CONTROL Using the Front Panel Controls 3 14 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Astronics Test Systems 2 Select line 3 next to the top line by pressing the third key This allows the pathname to be selected from a list of those that are presently defined in the 1256 switching system PATH CONTROL Select Filter Mask gt PATH1 lt Status Open 3 Rotate the knob until line 3 indicates the desired pathname PATH2 for this example PATH CONTROL Select Filter Mask gt PATH2 lt Status Open 4 Press the fourth key to select line 4 Rotate the knob until the display reads PATH CONTROL Select Filter Mask PATH2 lt Set to Closed 5 Press the fourth key to confirm the closure of the desired pathname The entire path then closes and the display indicates the updated status on line 4 PATH CONTROL Select Filter Mask PATH2 gt Status Closed lt O
88. ads OPERATIONS Slot 03 1260 118 Channel O0 Set to Open Then press the fourth key to confirm the opening of the relay Pressing any other key cancels the change If you have difficulties using the 1256 Switching System refer to Appendix C TROUBLESHOOTING to resolve the problem If the problem persists refer to contact Customer Support at Astronics Test Systems for assistance Getting Started 2 7 1256E User Manual Switching and Heat Dissipation Getting Started 2 8 Publication Number 980873 Rev A The 1256 accommodates all Adapt A Switch plug ins which gives it exceptionally high density switching capability When switching a large quantity of signals near its maximum rated loading current a plug in generates heat due to the resistance of its conducting paths and relay contacts To prevent excessive heat certain guidelines apply regarding the maximum number of channels that may carry full rated current at one time In a high density switching system it is not reasonable to have all relays simultaneously closed all carrying full rated current operating at the maximum rated ambient temperature Some form of de rating is necessary Whether or not a plug in requires de rating and to what degree depends on the type of plug in its switching density and the ambient temperature The following guidelines provide practical de rating for plug ins used in the 1256 chassis Signal Switch Plug Ins
89. al Publication Number 980873 Rev A For the remainder of this discussion of the INCL query assume the following commands have been executed NCL 1 0 2 0 4 0 NCL 2 7 10 INCL 3 16 19 NCL 1 3 5 INCL 4 1 4 14 23 These commands define five distinct include groups The reply to the query be one of the following A If no include groups are defined for any of the channels passed as a parameter the reply will be a single ASCII linefeed character For example if the query INCL 1 15 is specified the reply will be a single linefeed character since channel 15 of module 1 has not been placed on an include list B f all channels specified in the query reside on a single include group the reply will be a single channel list and terminated with an ASCII linefeed character For example the command INCL 2 0 returns the reply 81 0 2 0 4 0 Note that the reply maintains the order in which the include group was defined That is the reply begins with channel 1 0 even though the query was sent for channel 2 0 C If multiple channels are specified in the query and the channels reside on different include lists then multiple lists will be returned in the reply The lists will be separated from each other by a comma For example the command INCL 81 0 10 2 0 10 3 0 10 returns the reply 1 0 2 0 4 0 1 3 5 and the reply INCL
90. applications such as controlling via LabVIEW programs e Carriage return and line feed CR LF The factory default is line feed only To select the EOL terminator proceed as follows 1 Press the top key Rotate the knob until the top line reads SETTI 2 Select line 2 next to top line by pressing the second key This selects line 2 so that you may choose the type of setting to work with pe SETTINGS gt Type Display lt Option Format Status Decimal 3 Rotate the knob until line 2 reads as shown below lines 3 and 4 may differ cmm SETTINGS gt Type RS 232 lt Option Data Bits Status 8 4 Press the third key to select line 3 of the display Rotate the knob until line 3 appears as shown below c SETTINGS Type RS 232 gt Option EOL Mode lt Status CR Only Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Setting the Data Bits Stop Bits and Parity Astronics Test Systems 5 If line 4 of the display already indicates the desired EOL terminator then no action is necessary Otherwise press the fourth key Rotate the knob until the desired EOL terminator shows on line 4 In this example CR LP is desired SETTINGS Type RS 232 Option Baud Rate lt Update CR LF Then press the fourth key to confirm the update Pressing any other button cancels the change When u
91. ath from the controller to every device residing on the bus GPIB cables are available in two lengths e GPIB Cable 1 meter 3 28 ft P N 500310 001 e GPIB Cable 2 meters 6 56 ft P N 500310 002 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual To use the IEEE 488 GPIB interface with the 1256 Switching System you also need a computer equipped with a GPIB controller GPIB Cabling Adhere to the following guidelines to maximize the data transfer Guidelines rate of the GPIB system e Total cable length of no more than 20 meters 65 6 feet e Maximum separation of 4m 13 2 feet between devices Average separation of no more than 2 meters 6 6 feet e Maximum of 15 devices including controller connected to the bus Connecting the Use a GPIB cable to connect the rear panel GPIB connector on the GPIB Cables 1256 to the GPIB port of the host computer Refer to Figure 4 2 Connecting the GPIB Interface CAUTION Avoid stacking more than three cables on any single connector If the stack is too large side forces may damage the connector mounting CAUTION Tighten the locking screws finger tight on each connector Do not over tighten Astronics Test Systems Computer Interfaces 4 11 1256E User Manual Publication Number 980873 Rev A To GPIB Connector GPIB Connector GPIB Cable Figure 4 2 Connecting the GPIB Interface Before using the GPIB interface with the 1256 you must selec
92. bsidiaries affiliates and distributors harmless against all claims arising out of a claim for personal injury or death associated with such unintended use FOR YOUR SAFETY Before undertaking any troubleshooting maintenance or exploratory procedure read carefully the WARNINGS and CAUTION notices CAUTION T RISK OF ELECTRICAL SHOCK If this instrument is to be powered from the AC line mains through an autotransformer ensure the common connector is connected to the neutral earth pole of the power supply This equipment contains voltage hazardous to human life and safety and is capable of inflicting personal injury DO NOT OPEN Before operating the unit ensure the conductor green wire is connected to the ground earth conductor of the power outlet Do not use a two conductor extension cord or a three prong two prong adapter This will defeat the protective feature of the third conductor in the power cord Maintenance and calibration procedures sometimes call for operation of the unit with power applied and protective covers removed Read the procedures and heed warnings to avoid live circuit points UTION SENSITIVE ELECTRONIC DEVICES Dx AR Before operating this instrument 1 Ensure the proper fuse is in place for the power source to operate 2 Ensure all other devices connected to or in proximity to this instrument are properly grounded or connected to the protective third wire earth ground
93. change Enabling or Disabling the Screen Saver The purpose of the screen saver is to maximize the life of the fluorescent display The screen saver automatically turns the display off after no controls have been operated for a certain time interval To set this time interval refer to Setting the Screen Saver Timeout later in this section To enable or disable the screen saver proceed as follows 1 Press the top key next to the display Rotate the knob until the top line reads ETTI Select line 2 next to the top line by pressing the second key Rotate the knob until line 2 of the display reads Type Display ETTI Type Option Status Display Format Hex Press the third key to select line 3 of the display option Rotate the knob until line 3 of the display reads as follows ETTI Type Displ Option Saver Status Enabl ay ed If line 4 already shows the desired status then no further action is necessary Otherwise select line 4 Then rotate the knob until line 4 shows the desired status enabled or disabled This example uses Disabled eg SETTINGS Type Display Option Saver lt Update Disabled Then press the fourth key bottom to update Pressing any other key cancels the change NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desi
94. channel list The problem occurs when a path must go through the failsafe throw first throw To make this path the switch must be in an open or off state The open channel list readily accomplishes this task The PATH DEFINE command may be used to associate a name with one or more relays The format for this command is ROUTe PATH Jg DEFine path name gt close channel list lt open channel list gt The lt path name gt follows the same name requirements as a lt module name gt as described in the previous paragraphs The lt close channel list gt and the optional lt open channel list gt follows the syntax rules described in the Specifying Relays in Commands section of this chapter The following examples illustrate the use of a path name This associates the name pathi with the close channel list encompassing relays 6 through 9 on plug in module 8 and relay 77 on plug in module 4 PATH DEF pathl 8 6 9 4 77 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Removing Path Names Astronics Test Systems This associates the name dmm_to_P177 with the close channel list channels 205 and 305 on the module whose name is defined as matrix PATH DEF dmm to P177 matrix 305 205 This associates the name oscope with a close channel list for channels 0 and 3 on plug in module 3 and an open channel list for plug in module 5 channel 15 PATH
95. channel list gt is described in the previous paragraphs of this section of the manual The OPEN command may be used to query the present state of the relays in the system This command returns a reply of a sequence of 0 and 1 each of which are separated by a single ASCII space character The value of the reply is 1 if the corresponding relay is opened or 0 if the corresponding relay is closed Note that this is the opposite state from the CLOSE query The MOD LIST command may be used to query the 1256 for the types and slot numbers of the cards present in the system ROUTe MODule LIST module address As an example if a 1256 contains a 1260 136A 1260 167B and a 1260 138 in slots 4 7 and 8 respectively supposing that the following command was executed MOD LIST the reply would be 4 1260 136A HIGH CURRENT 1X42 2X21 MUX 7 1260 167B DUAL 1x6 RF SWITCHING MODULE 8 1260 138 64 CHANNEL DPST 2A MUX Individual slots can also be queried MOD LIST 87 Where the reply would be 7 1260 167B DUAL 1x6 RF SWITCHING MODULE This command is NOT defined in the SCPI standard This command follows the syntax rules of SCPI to implement this functionality SCPI Command Basics 5 37 1256E User Manual System Commands Reading Error Messages SCPI Command Basics 5 38 Publication Number 980873 Rev A The 1256 instrument supp
96. command is ROUTe MODule CATalog The reply to this command consists of the presently defined module names separated by a comma Module names are stored internally in upper case characters by the 1256 These upper case names are returned in the reply For example suppose the following commands have been executed MODULE DEFINE scanner 1 MODULE DEFINE matrix 2 MODULE DEFINE power 5 MODULE DEFINE rf mux 4 Then the query Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Reading the Module Address for a Module Name Storing the Module Names in Non Volatile Memory Astronics Test Systems MOD CAT returns the reply SCANNER MATRIX RF MUX POWER The module address associated with a module name may be read using the MODULE DEFINE query The syntax for this command is ROUTe MODule DEFine module name Using the example in the previous section of this manual the query MODULE DEFINE matrix returns the reply 2 All module names presently defined may be prepared for storage in non volatile memory using the MODULE SAVE command The actual process of updating non volatile memory for this command requires a separate SYSTEM NVUPD command This allows multiple relay states path names path definitions and module names to be updated in rapid succession followed by a single slower update of th
97. d using the PATH DEFINE query The syntax for this command is ROUTe PATH DEFine lt path name gt Using the example in the previous section of this manual the query PATH DEFINE dmm_to_pinl returns the reply 81 117 2 17 All paths presently defined may be prepared for storage in non volatile memory using the PATH SAVE command NOTE The actual process of updating non volatile memory requires a separate SYSTEM NVUPD command This allows multiple relay states exclude lists include lists and module names to be updated in rapid succession followed by a single slower update of the actual non volatile memory The CLOSE command may be used to close channels To say a channel is closed it means either a The input of the channel is connected to the output Single Pole Single Throw b The input of the channel is disconnected from the normally closed output and connected to the normally open output Single Pole Double Throw c The common input of a mux is connected to the output denoted by the channel number The syntax for the CLOSE command is ROUTe CLOSe lt channel list gt SCPI Command Basics 5 35 1256E User Manual Opening Relays SCPI Command Basics 5 36 Publication Number 980873 Rev A The format for a lt channel list gt is described in the previous paragraphs of this section of the manual The CLOSE command may be used to query the present
98. d automatically when the power is turned on Menu preferences include all preferences set by the user such as remote interface settings display intensity and display format The 1256 stores all menu preferences together as a single state Storing the Switching State To store the current switching state proceed as follows 1 Press the top key next to the display Rotate the knob until the top line reads gt STORE RECALL lt 2 Select line 2 next to the top line by pressing the second key Rotate the knob until line 2 of the display reads as shown STORE RECALL gt Type State lt Config Defaults Action lt select gt 3 Press the third key to select line 3 of the display Rotate the knob until line 3 indicates the desired location for saving the state There are two types of choices a To store the state as the power up state automatically restored when power is turned on rotate the knob until line 3 of the display reads as shown STORE RECALL Type State Using the Front Panel Controls 3 25 1256E User Manual Publication Number 980873 Rev A gt Config Powerup lt Action lt select gt b To store the state where you may select it at any time rotate the knob until line 3 of the display indicates the desired preset number 1 through 100 This example uses location 001 STORE RECALL Type State Config 001 lt Action lt se
99. disable flow control Note that sending large blocks of data without flow control may necessitate a slower baud rate to avoid data overrun problems Setting the Flow Control Option To select the flow control option or to disable flow control proceed as follows 1 Press the top key Rotate the knob until the top line reads iSi de SETTINGS lt 2 Select line 2 next to top line by pressing the second key This selects line 2 SETTINGS gt Type Display lt Computer Interfaces 4 19 1256E User Manual Publication Number 980873 Rev A Option Format Status Decimal 3 Rotate the knob until line 2 reads as shown below lines 3 and 4 may differ ced SETTINGS gt Type RS 232 lt Option Baud Rate Status 9600 4 Press the third key to select line 3 of the display Rotate the knob until line 3 indicates the Flow Control option as shown below pee SETTINGS Type Remote Option FlowCtrl Status Disabled 5 The three available flow control options on line 4 are e Disabled e XON XOFF e RTS CTS If line 4 of the display already indicates the desired choice then no action is necessary Otherwise press the fourth key Rotate the knob until the desired selection shows on line 4 In this example XON XOFF is desired Puce SETTINGS Type RS 232 Option FlowCtrl lt Update XON XOFF Then press the fourth
100. e actual non volatile memory All module names stored in non volatile memory may be recalled from non volatile memory using the MODULE RECALL command The syntax for these commands is shown below ROUTe MODule SAVe RECall These commands are NOT defined in the SCPI standard These commands follow the syntax rules of SCPI to implement this functionality SCPI Command Basics 5 31 1256E User Manual Naming a Path Defining Path Names SCPI Command Basics 5 32 Publication Number 980873 Rev A A group of channels may also be assigned a name When a group of channels is named it is called a path A path may consist not only of elements that must be closed the closed channel list but also of elements that must be opened the open channel list to complete the path This may at first seem contradictory to close a path with switching elements that must be opened but it nevertheless occurs A good example which illustrates the concept of an open channel list is a typical 1P2T failsafe microwave switch Because this type of switch is failsafe it only requires a single control line By default with no power applied the first throw is always connected to the common Energizing the control line opens the first throw and closes the connection between the second throw and the common Both are obviously mutually exclusive Defining a path through the second throw of the example switch can be done strictly with a close
101. e new terminal baud rate to set the 1256 baud rate see Chapter 4 GPIB and RS 232 Interfaces under the heading Setting the Baud Rate Text from 1256 to remote terminal overwrites itself staying on one line Text from 1256 to remote terminal is double spaced lines of text are separated by blank lines Remote terminal does not display characters that are typed Troubleshooting C 4 Cable is excessively long or not of high quality Termination characters of 1256 not compatible with terminal setup Termination characters of 1256 not compatible with terminal setup Echo mode of remote terminal is not set to half duplex local echo HyperTerminal included with Microsoft Windows can fail to echo characters properly Use a high quality shielded cable Set 1256 to use carriage return and line feed CR LF as termination characters see Chapter 4 GPIB and RS 232 Interfaces under the heading Setting the Message Termination Characters Set 1256 to use only carriage return CR as termination character see Chapter 4 GPIB and RS 232 Interfaces under the heading Setting the Message Termination Characters Set terminal for half duplex local echo mode Consult the terminal user s manual for instructions Download newer version known as HyperTerminal Private Edition from http www hilgraeve com Astronics Test Systems Publication Number 980873 Rev A 1256E
102. ection Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Local Lockout In some applications it may be desirable to lock out disable the front panel controls while controlling the 1256 via a remote interface The 1256 provides two types of local lockout Automatic lockout When the 1256 receives any command via the Ethernet RS 232 or GPIB interfaces it shows a message on the front panel display stating that the unit is in remote operation and which interface TCP IP GPIB or RS 232 is active For example after receiving a command via the RS 232 interface the display reads REMOTE OPERATION RS 232 is active lt Local Mode At this time the knob and all keys are disabled and the 1256 receives commands from the remote interface only The user may restore local control only by issuing a KLOCK OFF command The display then returns to the state that it was in when the 1256 entered lockout mode Manual control is also restored if the user cycles the power to the 1256 Manual lockout When the 1256 receives the command SYST KLOCK ON local lockout via the Ethernet RS 232 or GPIB interface it displays the following message assuming that the RS 232 port is selected REMOTE OPERATION RS 232 is active Local Mode Lockout In this case
103. eeds Line delay o milliseconds Character delay o milliseconds m ASCII Receiving Append line feeds to incoming line ends Force incoming data to bit ASCII Iv Wrap lines that exceed terminal width omen Figure 4 11 ASCII Setup Dialog Box Using the mouse check the boxes as shown in the figure Make sure all other boxes are unchecked Then click on OK taking you back to Setting Dialog Box Click OK again The main communications screen then appears as shown in Figure 4 8 To finalize the connection click on the Call menu then click on Connect To test the communications between the computer and the 1256 type the following command IDN Then press Enter The 1256 should respond with Racal Instruments 1256 Switch System 03 10 The number at the end of the response is the firmware revision number which may differ from what is shown above NOTE The version of HyperTerminal that is shipped with Microsoft Windows may not echo characters to the screen properly An updated version is available from Hilgraeve Inc at http www hilgraeve com The new version is called HyperTerminal Private Edition Computer Interfaces 4 30 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Chapter 5 SCPI COMMAND BASICS SCPI Command Overview Input Format Astronics Test Systems The 1256 accepts commands over either the GPIB or serial interfaces These c
104. element HOLD Triggers are ignored and the scan list will not advance IMMediate The scan list once initiated advances as fast as possible after considering the relay settling time trigger input delay and trigger output delay The Scan List operation is initiated by sending an INIT I MMEDIATE command or INIT CONTINUOUS command EXT This selects the 1256 external trigger input line Each time a low going pulse is received on the line the scan list advances to the next element After power up and after a RST command the trigger source is set to IMMEDIATE The present trigger source may be queried using the TRIGGER SOURCE query The reply to this query will be one of the following BUS HOLD IMM EXT Selecting the The trigger count determines how many elements will be scanned in the scan list That is if the trigger count is 10 then the scan list Trigger Count will advance 10 times before halting Any triggers received from the selected trigger source will be ignored after the trigger count has been satisfied The syntax for the TRIGGER COUNT command is TRIGger SEQuence COUNt trigger count The trigger count is a numeric value between 1 and 21747483647 2 1 The present trigger count may be queried by using the Advanced SCPI Operations 8 8 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Selecting a Trigger Delay Arming and Disarming the 1256 Astr
105. ems Publication Number 980873 Rev A 1256E User Manual change Storing the Menu Preferences The 1256 can store one menu preference state which is automatically restored when the power is turned on To store the current menu preferences as the power up state proceed as follows 1 Press the top key next to the display Rotate the knob until the top line reads STORE RECALL 2 Select line 2 next to the top line by pressing the second key Rotate the knob until line 2 of the display reads as shown STORE RECALL gt Type Menu lt Config Defaults Action lt select gt 3 Press the third key to select line 3 of the display Rotate the knob until line 3 reads as shown STORE RECALL Type Menu gt Config Powerup lt Action select 4 Press the fourth key to select line 4 of the display Rotate the knob until line 4 reads as shown STORE RECALL Type Menu Config Powerup lt Do Store 5 Press the fourth key again to store the power up state into temporary RAM Pressing any other key cancels the change Be sure to continue through the steps below to copy the state from temporary RAM to non volatile memory NOTE The temporary RAM is a section of SRAM dedicated to storing an image of the data that will be copied to non volatile RAM Continue with the following steps to copy this image into non volatile RAM
106. erface 2 6 5 4 RTS 5 26 safety 5 26 SCPI 2 6 5 1 5 2 5 3 5 4 5 11 5 13 5 17 5 21 5 22 5 23 5 30 5 33 5 39 5 40 5 41 5 43 8 19 8 20 8 21 Index 2 1256 User Manual self test 2 5 5 6 5 19 Service Request Enable Register 5 9 5 12 5 13 5 15 5 16 SRQ 5 7 5 12 5 16 5 21 Standard Event Status Enable Register 5 9 5 10 5 11 5 12 5 13 5 14 5 16 Standard Event Status Register 5 9 5 10 5 11 5 13 5 14 5 15 5 16 5 27 5 40 status byte 5 6 5 11 5 13 5 20 5 21 5 27 system commands 5 40 Trigger Input Delay 5 18 Trigger Input Source 5 18 Trigger Output Delay 5 18 trigger source 5 21 5 22 URQ 5 9 User Request 5 9 Waiting For Arm 5 21 XON XOFF 5 26 Astronics Test Systems
107. et the TCP IP address Press key 3 to select line 3 Rotate the knob until line 3 appears as follows line 4 may differ Weed SETTINGS Type TCP IP Option IP Oct 1 Status 0 This prepares the 1256 to set the first octet eight bits of the IP address Select line 4 Rotate the knob until line 4 the Status line displays the first octet of your desired IP address For example if you wish to set the IP address to 197 23 0 123 rotate the knob until line 4 shows the first octet i e 197 if line 4 already shows the desired octet then skip to the next step eo SETTINGS Type TCP IP gt Option IP Oct 1 lt Update 197 Then press key 4 again to confirm Select line 3 Rotate the knob until line 3 shows IP Oct 2 as follows If line 4 does not already show the desired second octet of your address then select line 4 Rotate the knob until line 4 shows the second octet of your address for IP address 197 23 0 123 the second octet is 23 SEER SETTINGS Type TCP IP gt Option IP_Oct_2 lt lt Update 23 Press key 4 again to confirm Continue in this manner setting the third and fourth octets of your IP address Setting the Gateway Setting the gateway is similar to setting the IP address The gateway is made up of four octets Set the gateway by entering Computer Interfaces 4 8 Astronics Test
108. f operation 2 Issue a verification command for the relays or range of relays of interest Advanced SCPI Operations 8 18 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Astronics Test Systems This process is illustrated with several examples If the following command was sent VERIFY MASK 2 0 10 1 the 1256 would set the verification masks for plug in module 2 channels O through 10 to inverted feedback The following command would do the same thing except set the same channels to normal non inverted feedback VERIFY MASK 2 0 10 0 If a channel needs to be set to don t care this is easily accomplished by sending a value of X for the mask VERIFY MASK 86 5 7 10 15 X Assuming in the first example that the plug in card located in slot 2 had channels 0 1 2 3 4 5 6 7 8 9 10 11 and 12 issuing the following query VERIFY MASK 2 0 12 would return p lshodo Gb uev TO SE XX which would indicate the masks for the first 11 channels were inverting and the last two were don t cares If this hypothetical card had a bad relay on channel 11 issuing the command VERIFY 2 0 12 would simply return OK If on the other hand channels 3 5 and 11 were bad sending the same verification command would return Z uto BPA 9 As was the case earlier channel 11 is excluded by the mask and will not show up
109. filter masks to wildcards or to specific characters to limit the display of pathnames to those meeting particular user criteria Defining a Path The 1256 front panel enables the user to manually close or open pathnames after they have been defined remotely using the SCPI path definition command through one of the remote interfaces Refer to Naming a Path section in Chapter 5 for more details on defining path names Once a path is defined through a remote interface it is immediately available for display and use on the front panel and will remain visible until either 1 the power is removed from the system or 2 the path is removed remotely using the SCPI path delete command If the intent is to define the pathnames once and make them accessible to the front panel after power is cycled to the 1256 the defined pathnames must also be stored in non volatile memory Refer to Storing Path Names in Non Volatile Memory section in Chapter 5 for more details It is important to realize that the SCPI command language allows pathname lengths that exceed the display capability of the 1256 18 characters If pathnames are defined greater than 18 characters only the first 18 characters will be visible lt is also only possible to selectively filter the first 18 characters using the display filter masks Characters extending beyond this limit are treated with wildcards when the filter mask is applied Closing a Path The 1256 front panel en
110. first three commands define module names and a path The last command shows that the INCLUDE command can use these definitions in an include list The include list relationship for a particular relay or multiple relays may be removed by using the INCLUDE DELETE command The following examples illustrate the use of the INCLUDE DELETE command INCLUDE 3 0 4 INCLUDE DELETE 3 2 The first command defines an include list consisting of channels 0 through 4 on module 3 The second command removes channel 2 from any include list definitions After the second command is executed the include list now consists of channels 0 1 3 and 4 These two commands are thus equivalent to a single command INCLUDE 3 0 1 3 4 INCLUDE 1 0 19 2 0 19 INCL DEL 1 5 8 2 11 15 17 The first command defines an include list of channels 0 through 19 on both modules 1 and 2 The second command removes include list association for channels 5 through 8 on module 1 and channels 11 15 and 17 on module 2 These two commands are equivalent to the command INCLUDE 1 0 4 9 19 2 0 10 12 14 16 18 19 INCL DELETE ALL All include list definitions are deleted The include list association for a single channel for multiple channels or for all channels in the system may be checked using the INCLUDE query Astronics Test Systems Advanced SCPI Operations 8 3 1256E User Manu
111. from battery leakage or problems arising from normal wear such as mechanical relay life or failure to follow instructions This warranty is in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular use The remedies provided herein are buyer s sole and exclusive remedies For the specific terms of your standard warranty contact Customer Support Please have the following information available to facilitate service 1 Product serial number 2 Product model number 3 Your company and contact information You may contact Customer Support by E Mail atshelpdesk astronics com Telephone 1 800 722 3262 USA Fax 1 949 859 7139 USA RETURN OF PRODUCT Authorization is required from Astronics Test Systems before you send us your product or sub assembly for service or calibration Call or contact Customer Support at 1 800 722 3262 or 1 949 859 8999 or via fax at 1 949 859 7139 We can also be reached at atshelodesk astronics com If the original packing material is unavailable ship the product or sub assembly in an ESD shielding bag and use appropriate packing materials to surround and protect the product PROPRIETARY NOTICE This document and the technical data herein disclosed are proprietary to Astronics Test Systems and shall not without express written permission of Astronics Test Systems be used in whole or in part to solicit quotations from a
112. fy channel list or path name gt VERify ALL Query Only SYSTEM Subsystem 5 36 SYSTem ERRor Query Only 5 40 VERSion Query Only 5 41 1994 0 NVUPD 5 43 NVUPD 5 43 KLOCK ON OFF 3 20 5 41 KLOCK 5 41 STATUS Subsystem 5 21 STATus 5 23 PRESet Command Only OPERation 5 23 EVENt Query Only 5 23 CONDition Query Only 255 0 0 5 23 ENABle enable mask gt 5 23 ENABle 5 23 QUEStionable When the register or status EVENt Query Only event are read they will CONDition Query Only return a value of zero 0 ENABle enable mask These commands are not ENABle used with the 1256 TRIGGER and Related Commands Subsystem 8 7 TRIGger 8 7 SEQuence 8 8 COUNt trigger count 2314 1 1 8 8 2 billion DELay trigger delay 10 0 0 0 0 0 8 9 resolution 0 000001 1 microsecond SOURce BUS HOLD IMMediate EXT IMMediate 8 8 IMMediate 8 11 OUTPut DELay output trigger delay time 10 0 0 0 0 0 8 12 resolution 0 000001 1 microsecond TRIGger 8 12 STATe ON OFF 1 0 8 12 INITiate 8 9 SCPI Command Reference 6 4 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Table 6 1 Continued Command Mex Min Defaut Seepage Notes IMMediate ON OFF 1 0 CONTinuous ON OFF 1 0 Command Only Command Only ABORt DIGITAL Subsystem 7 4 DIGital 7 4 STATe port list ON OFF 1 0 7 4 CONFigu
113. ge Termination CharactelS ooononnoccccnnnncconnnoconnccnnnncnnnnnnnnnnncnnnnnnnnnnnannnnns 4 22 Setting the Data Bits Stop Bits and Parity ccoomnconccccnnnniccnnncconoccnnnncconnnnnn cnn nnnccnnncnnnannnes 4 23 Using Microsoft Plyper Terminal ce o EE diia tend Let Lud 4 25 Gard m 5 1 SCPI COMMAND BASICS rennen nate ainda 5 1 SCPI Command OVOrVIgW e peo oni e conet e Gare aaa teo ee ptum oa 5 1 Iti bit FOI ess soto vatem cidad tds oda trad aeque 5 1 Command Keyword Long Form and Short ForM oooooonnnnnnnccccnnncnnnnnononcnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnns 5 3 Case Sensitivity sospes d LS as AS A eben ee E Eds 5 3 Optional Wound ta 5 4 Querying Parameter SettidQ oooconoccccnnononocccnnonancccnnnnnnnconcnnnnn cnn cnnnnn cra cnn nennen nnne nnne 5 4 SOF GCOMMANG PSM Oia A iA a EC Ru OR eI abate oe lema Rear 5 4 IEEE STD 488 2 Common Commands eese enne nnne nnne 5 5 IEEE 488 2 Common GOIimahldss s Anite ames ue opted Ane o pod Adee erben died 5 6 IEEE 488 2 Status Description ac ea ect eat ELS Uer e e 5 7 Standard EVENT STATUS Register s ioter E OE TP Str ER RP Dore diate abe ee eee it 5 9 STEATUS BYTE FOgISIBI 2 ob no pde ede te aa 5 9 SERVICE Register ENABLE Register sccccceeeeeeeeeeeeeeeeeeeeeeeeeeesaeaaeeeeeeeeeenesaaaes 5 12 CES GOMMANO PR Pr 5 13 NEES ECON sa 5 14 TESE iB SS EIL LM HMM MM MALE 5 14 TE OR QUE coa o tae 5 15 PORE COMMANG atada do aset de croatas odas rs caso 5 15
114. gger count Each time the INIT IMMEDIATE command is received scanning resumes from the point at which it was stopped NOT from the beginning of the scan list That is if the commands SCAN 81 0 19 Advanced SCPI Operations 8 9 1256E User Manual Publication Number 980873 Rev A n Jj IG COUNT 3 Ti Jj IG SOUR BUS INIT IMMEDIATE are executed the 1256 will accept up to 3 triggers After the third trigger scanning will be disabled since the trigger count value has been reached At this point channel 2 from module 1 will be closed because it is the third element in the scan list Now if a second INIT IMMEDIATE command is received the 1256 will accept up to 3 more triggers The first trigger received will open channel 2 and close channel 3 The INIT CONTINUOUS command also arms the 1256 This command allows the 1256 to continuously scan through the channels in the scan list The 1256 will NOT stop scanning after the number of triggers equal to the trigger count have been received This command effectively bypasses the trigger count limit The ABORT command disarms the 1256 Once the 1256 receives the ABOR or ABORT command it will not perform any scan list actions until it is rearmed by using the INIT IMMEDIATE or INIT CONTINUOUS commands At power up and after executing a RST command the 1256 is disarmed The trigger and arm state diagram is shown in Figure 8 1 This diag
115. ght clockwise The front panel speaker makes a clicking noise as the knob rotates At each click the selected display line shows another choice After the first click the display shows the following choice on line 1 e STORE RECALL Type State T j faults gt Option De O Action lt select gt Note that the top line has changed along with the related information on lines 2 3 and 4 3 Rotate the knob another click to the right The display now shows o HA Firmware Revisions qi eui ne Boot 02 05 O Flash 02 15 Astronics Test Systems Using the Front Panel Controls 3 3 1256E User Manual Publication Number 980873 Rev A 4 Rotate the knob one more click to the right The display shows Y PBc OPERATIONS Rc Slot 01 1260 118 e a np Channel 0 e Status Open Now the OPERATIONS menu is active This menu contains the functions for operating the relays 5 Press the second keypad switch corresponding to the second display line This selects the second line indicated by the selection symbols gt and lt Y OPERATIONS gt Slot 01 1260 118 lt ei e _ Channel 0 e Status Open Line 2 also indicates that slot 1 contains a 1260 118 plug in 6 Rotate the knob one click to the right Line 2 of the display now shows the contents of slot 2 1260 1
116. h may be read with ESR query The ESE command has the format ESE lt ESE value gt where the lt ESE value gt is an integer numeric value in the range from 0 through 255 This query reads the value presently programmed for the Standard Event Status Enable Register This reads the value as programmed by the ESE command Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual ESR Query SRE Command SRE Query Astronics Test Systems This query reads the value of the Standard Event Status Register Each bit of this register indicates a true false status condition When the bit is set the condition is TRUE when the bit is cleared the condition is FALSE The bit assignments are defined by the IEEE 488 2 specification The bit assignments are described in the text following Figure 5 1 The bits of the Standard Event Status Register are cleared at power on except for bit 7 which is set As conditions become true the corresponding bit in the register are set These bits remain set until e The ESR query is executed e The CLS command is executed The reply to the ESR query is a numeric integer value in the range O to 255 The SRE command sets the value of Service Request Enable Register The value of this register is logically ANDed with the contents of the Status Byte If any bits of this AND operation are set bit 6 of the Status Byte is set Bit 6 is
117. he RS 232 interface provides three parity options none no checking performed even sum of all bits including parity bit is an even number or zero and odd sum of all bits including parity is an odd number For most applications this is set to none Computer Interfaces 4 23 1256E User Manual Computer Interfaces 4 24 Publication Number 980873 Rev A To set these parameters proceed as follows 1 Press the top key Rotate the knob until the top line reads SETTINGS lt 2 Select line 2 next to top line by pressing the second key This selects line 2 so that you may select the type of setting to work with Stes SETTINGS gt Type Display lt Option Format Status Decimal 3 Rotate the knob until line 2 reads as shown below lines 3 and 4 may differ SETTINGS gt Type RS 232 lt Option Data Bits Status 8 4 Press the third key to select line 3 of the display Rotate the knob until line 3 indicates the desired parameter as shown below in this example the parity option is chosen ec SETTINGS Type RS 232 Option Parity lt Status Even 5 If line 4 of the display already indicates the desired choice for the parameter then no action is necessary Otherwise press the fourth key Rotate the knob until line 4 displays the desired choice in this example None is the desired choice SS
118. he complete menu hierarchy for the 1256 Switching System Menu items are indented according to their levels of hierarchy For example LEVEL 1 top line of display LEVEL 2 second line of display LEVEL 3 third line of display LEVEL 4 fourth line of display The complete menu listing is as follows OPERATIONS Plug In slot number and model number to control State of channel relay or digital I O Close or Open relay Or High or Low digital 1 0 PATH CONTROL Filter mask user selected Select Path s Reset Mask SETTINGS Remote Using the Front Panel Controls 3 29 1256E User Manual Publication Number 980873 Rev A Lockout Disabled Enabled RS 232 Baud Rate 1 200 2 400 4 800 9 600 19 200 38 400 57 600 115 200 Data Bits 8 7 Parity None Even Odd Stop Bits 1 2 Flow Control Disabled XON XOFF RTS CTS EOL Mode LF Only CR LF CR Only GPIB Address 0 1 2 30 PwrOnSRQ Enabled Disabled TCP IP Addr_mode Auto _ DHCP Man_Use Man_Set IP_Oct_1 0 Using the Front Panel Controls 3 30 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual 255 IP Oct 2 0 255 IP Oct 3 0 255 IP Oct 4 0 255 GW_Oct 1 0 255 GW Oct 2 0 255 GW Oct 3 0 255 GW_Oct 4 0 255 NM Oct 1 0 255 NM Oct 2 0 255 NM Oct 3 0 255 NM Oct 4 0 255 Display Format Hex Binary Decimal Intensity Astronics Test Systems Using the Front Panel Controls 3 3
119. hen starts and displays the Connection Description dialog box as shown in Figure 4 5 Computer Interfaces 4 25 1256E User Manual Publication Number 980873 Rev A Connection Description Figure 4 5 HyperTerminal Connection Dialog Box Enter a name such as 1256 for the new connection Then click on OK HyperTerminal then displays the Phone Number dialog box as shown in Figure 4 6 your screen may differ slightly Phone Number Dire ct to m2 Figure 4 6 Phone Number Dialog Box Computer Interfaces 4 26 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual On the Connect Using line select the serial port you wish to use This example uses Com 2 Click on OK HyperTerminal then displays the COM Properties dialog box shown in Figure 4 7 COM2 Properties 121 x Port Settings Bits per second 5 y Data bits e y Parity none Stop bits fi Flow control Noe ml Restore Defaults OK Cancel Figure 4 7 COM Properties Dialog Box Set the baud rate to match the 1256 baud rate Set the port for 8 data bits no parity one stop bit and no flow control as shown in Figure 4 7 Click on OK HyperTerm then displays the main terminal screen as shown in Figure 4 8 Astronics Test Systems Computer Interfaces 4 27 1256E User Manual Publication Number 980873 Rev A 1256 HyperTerminal File Edit View
120. ied criteria Setting filter selection masks is performed easily as follows 1 5 Press the top key next to the display Rotate the knob until the top line reads gt PATH CONTROL Select line 2 next to the top line by pressing second key The display shows line 2 as being selected and will show a flashing cursor on the first position of the mask wildcards are the default and appear as an asterisk PATH CONTROL DOKCKCkCk ck ck ck ck kc ck KKK KKK KK ES Select Paths s Move the flashing cursor to the desired character position in the filter mask by pressing the line 2 key as many times as required to advance the cursor to the desired mask position Once in the desired position rotate the knob left or right to select the appropriate filter character or wildcard character PATH CONTROL gt PRKKZKKKKKKKKKKKKKS Select Paths s lt Reset Mask When the mask is fully defined pressing the line 3 key Using the Front Panel Controls 3 16 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Settings Menu Astronics Test Systems Select Path s option will apply the mask condition to defined paths If the system has paths meeting the mask criteria they can be displayed selected and controlled in the manner described earlier in this section PATH CONTROL Select Filter Mask gt PATH3 lt Status Open If no paths exist that meet the filter
121. ify the status of all switches Path Level Switching Allows complex paths to be defined with open and close elements stored in non volatile memory and be controlled remotely or through the front panel display Confidence Mode Automatically verifies correct application of voltage to relay coils Non Volatile Memory Stores and recalls switch configurations and 1256 user preferences such as GPIB address and RS 232 baud rate Power Up Recall Automatically recalls a complete switching system configuration from non volatile memory at power up Self Test Ensures that critical system components are functioning correctly This test executes automatically at power up Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Items Shipped The following items are shipped with each 1256 Switching System with the 1256 ITEM PART NUMBER QUANTITY 1256 Enclosure Assembly 407837 1 Instruction Manual 980873 1 AC Power Mains Cable 600620 1 Blanking Plates to cover 407667 4 empty plug in slots Software Driver 921678 1 The following accessories may be ordered separately e Option 60 Rack Mount Kit e Option 04 European Power Cord unterminated e GPIB Cable 1 meter e GPIB Cable 2 meter e RS 232 Cable 10 ft 9 pin female D Sub to 9 pin male D Sub Astronics Test Systems P N 407731 P N 407730 P N 500310 001 P N 500310 002 P N 602248 Introducti
122. in the error report In addition the 1256 will show only the first ten failures it finds when a large number of channels are specified in a query These commands are NOT defined in the SCPI standard These commands follow the syntax rules of SCPI to implement this functionality Advanced SCPI Operations 8 19 1256E User Manual Publication Number 980873 Rev A Saving Recalling the All verification masks presently defined may be prepared for if storage in non volatile memory using the VERIFY SAVE Verification Masks mana All module names stored in non volatile memory may be recalled from non volatile memory using the VERIFY RECALL command The syntax for these commands is shown below ROUTe z ERify SAVe RECall These commands are NOT defined in the SCPI standard These commands follow the syntax rules of SCPI to implement this functionality NOTE The actual process of updating non volatile memory requires a separate SYSTEM NVUPD command This allows multiple relay states exclude lists include lists and module names to be updated in rapid succession followed by a single slower update of the actual non volatile memory Automatically In addition to defining verification masks the user has the ability to Recalling determine whether the masks stored in non volatile memory are a recalled on application of power to the system The command Verification Masks syntax is as follows at Startup ROUTe
123. ine Keypad Display Knob Ill Speaker D Figure 3 1 Front Panel Controls Understanding The 1256 uses a multiple level hierarchical menu tree To help the 3 p user visualize the menu tree the menu is limited to four levels the Hierarchical Each hierarchical level is shown on its own line on the front panel Menu display The top line shows the top level The user begins by selecting a general type of function on line 1 top line Then on line 2 the 1256 displays choices that are more specific to the general function that was selected on line 1 After the user selects from the choices on line 2 the 1256 shows related parameters on line 3 Once the user chooses a parameter from line 3 the 1256 displays the current status or value of this parameter on line 4 On line 4 the user may choose from among different values for the parameter For example suppose slot 3 of the 1256 contains a 1260 120 plug in To close relay channel 2 on this plug in the user proceeds as follows Using the Front Panel Controls 3 2 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual 1 Press the top keypad switch This selects line 1 top line of the display as follows o A Type Remote gt gt Sp SS Option Source O Status GPIB RT NOTE The selection markers gt and lt indicate the display line that is currently selected 2 Rotate the knob to the ri
124. ing The ROUTE command keyword is optional since it is enclosed in square braces The ROUTE command keyword may be specified as ROUTE long form or as ROUT short form since the last character is displayed in lower case The CLOSE keyword must be followed by a lt channel list gt A lt channel list gt represents any of a number of possible channels in a variety of formats The format for the lt channel list gt and other command parameters are described in Chapter 5 SCPI Command Basics Since the ROUTE keyword is optional and the CLOSE keyword is shown indented from the ROUTE keyword valid commands consist of ROUTE CLOSE CLOSE The command ROUTE OPEN ALL is a command only Therefore the command ROUTE OPEN ALL is not allowed Since they are NOT shown as command only the commands ROUTE CLOSE and ROUTE OPEN are valid commands Table 6 1 contains a synopsis of the commands implemented by the 1256 The maximum and minimum values and resolution are shown for numeric parameters The commands marked with an asterisk are NOT defined in the SCPI language These commands follow the SCPI syntax rules for implementing the operation of the command SCPI Command Reference 6 2 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Table 6 1 Commands Implemented by the 1256 Command Max Min Default See page Notes ROUTE Subsystem 6 1 8 1 ROUTe 5 2 5 25 CLOSe channel lis
125. ing conditions Minimum value 0 Maximum value 255 but less than or equal to the number of data points loaded Figures 7 1 A D show the interaction between the DIG SYNC DATA command and the DIG SYNC INDEX command After power on or a RST command no data is loaded into any output port buffer of a 1260 114 The index for each port points to the first location in the buffer After executing the command DIG SYNC DATA 7 4 10 20 30 40 the memory buffer for port 4 of module 7 is filled with data as depicted in Figure 7 1 A There are four bytes loaded The index for this port points to the next available position in the port buffer shown as location 4 in the figure Astronics Test Systems Digital Module Operation 7 9 1256E User Manual Publication Number 980873 Rev A After executing the command DIG SYNC DATA 7 4 50 60 70 80 90 the memory buffer for port 4 of module 7 tracks that depicted in Figure 7 1 B There are now a total of nine bytes loaded The index for this port now points to the next available position in the buffer After executing the command DIG SYNC INDEX 7 4 3 the index for the port buffer now points to the fourth entry in the buffer This is where the next data will be loaded This is depicted in Figure 7 1 C After executing the command DIG SYNC DATA 7 4 77 78 the fourth and fifth data bytes are overwritten The previous data 40 and 50 is re
126. ing the Trigger COIN cada a 8 8 Selecting a Trigger Delay coccoooccnnnnoocccnonncnnnnnnnanancnononnnnnnnnnnnnnnnnnnnnnnrnnnnn nro nn nnnnnnnnnnnnnnnnes 8 9 Arming and Disarming the Tu tias dad 8 9 Generating a Single FUE sero tarda uds 8 11 Output Trigger Signals from the 1256 ieri ii co casizecu deae 2ca2 22722222 s atate ae doc 8 12 Astronics Test Systems V 1256E User Manual Publication Number 980873 Rev A Selecting an Output Trigger Destination ooonnoconnccccnnnncconnconancncnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnns 8 12 Using Scan Lists and External Trigger IMput oooocoonnnonccccnnnnnccnanannnncnnnnnnnnnnannanncononnncnnnnns 8 13 SCAN ISIS Ria 8 13 DETININA A SCAN t 8 15 Advance Verification Features oooconnnnoncccnnnnnnccnnnnnnnccncnnnnncnnnnnnnnnnnnnnnnnnnnn nana nn nn nn enne 8 17 Confidence Mode aa 8 17 Using Relay Verification sco t eet e hs dd 8 18 Saving Recalling the Verification Masks oconnonnnnccccccnnnonccannnnannnnnnnnnncnnnnnnnnannnnncnnnnn 8 20 Automatically Recalling Verification Masks at Startup oooooocccccooccooooooooonnnnnnnnnnnnnnnnnnnnnnnnnos 8 20 APDE TCI i A O A 1 SBPEGIPIONTIONS ei it iria pedea bee ac orn ire dee eds A 1 COMP a AAA AAA AA ASE A 1 A STO MI oan ge ee ME A 1 Remote Ie jackie coco HE tere come ao A 2 ENVIFO MO Malasia cos atacantes D cotes inte get cece otto ette omnes A 3 EI aang EV hk nec ita A 4 A OEE PS ORE CREE DES FEET A E LM M EAN A 4 FRG MARDI e
127. ion Timeout lt Update 15 Min Press the fourth key bottom to update the timeout value Pressing any other key cancels the change NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to Using the Front Panel Controls 3 24 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Store Recall Menu Astronics Test Systems make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Description After the user has set up the 1256 Switching System the setup may be stored in non volatile flash RAM Later the user may recall this setup to instantly restore the 1256 to the same state it was in earlier The STORE RECALL menu contains the functions for doing this The non volatile RAM can store two types of setup information switching states and menu preferences A switching state includes the positions closed or open of all relays The 1256 stores the states of all plug ins together as a single state When a switching state is recalled it automatically restores the states of all relays on all installed plug ins The 1256 can store up to 100 switching states or presets plus an additional state that is restore
128. ion is necessary Otherwise press the fourth key Rotate the knob until the desired baud rate shows on line 4 In this example 9600 is desired cue SETTINGS Type RS 232 Option Baud Rate lt Update 9600 Then press the fourth key to confirm the update Pressing any other button cancels the change Set the RS 232 port of your data terminal or computer to operate at the same baud rate as the 1256 Refer to the user s manual for your terminal for instructions on making these settings If you are using a computer with terminal emulation refer to the user s manual for the terminal emulation software Astronics Test Systems Computer Interfaces 4 21 1256E User Manual Setting the Message Termination Characters Computer Interfaces 4 22 Publication Number 980873 Rev A NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Each message to or from the 1256 must end with an end of line EOL character known as a terminator You may select the EOL terminator to be any one of the following e Carriage return CR only e Line feed LF only for non terminal based
129. ironmental General Temperature Humidity Altitude Shock Vibration Bench Handling Astronics Test Systems 1256E User Manual Switched mode PWM 90 VAC to 250 VAC auto ranging 47 63 Hz 180 VA max 5 VDC 20A MIL T 28800E Type III Class 5 Style F 20 to 60 C 40 C to 70 C Operating Storage 95 non condensing 10 000 feet 15 000 feet Operating Storage 30 g 11 ms Ya sine wave 0 013 in P P 5 55 Hz 4 inch drop at 45 Specifications A 3 1256E User Manual EMC Immunity Emissions Safety Safety Reliability MTBF Mechanical Dimensions Chassis Weight Installation Specifications A 4 Publication Number 980873 Rev A EN61326 Class A Table 1 EN61326 Class A Table 3 CE EN61010 1 42 390 hours with fan 3 5 high 16 6 wide 11 3 deep 7 Ibs 11 oz 3 5 kg Rack mount Use optional rack mount ears Option 65 for forward or reverse mounting Bench top Tilt legs for tabletop use Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Appendix B RACK MOUNTING ltems Included The rack mount kit Option 60 includes the following items Item Description Qty Part Number 1 Rack mount Ear 2 456884 2 6x32x34 Pan head Screw 4 616257 3 Instruction Sheet Option 60 Rack Mount 1 980858 Installing Rack NOTE Mount Ears There is no need to open the unit 1 Remove the feet b
130. key to confirm the update Pressing any other button cancels the change NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Computer Interfaces 4 20 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Setting the Baud To set the baud rate bit rate in bits per second proceed as Rate follows 1 Press the top key Rotate the knob until the top line reads pee SETTINGS lt 2 Select line 2 next to top line by pressing the second key This selects line 2 so that you may select the type of setting to work with SETTINGS gt Type Display lt Option Format Status Decimal 3 Rotate the knob until line 2 reads as shown below lines 3 and 4 may differ ue SETTINGS gt Type RS 232 lt Option Data Bits Status 8 4 Press the third key to select line 3 of the display Rotate the knob until line 3 appears as shown below LET SETTINGS Type RS 232 gt Option Baud Rate lt Status 2400 5 If line 4 of the display already indicates the desired baud rate then no act
131. key to select line 4 Rotate the knob until line 4 shows the desired data to write to the port This example uses 170 which equals AA g or an alternating 1 0 pattern OPERATIONS Slot 03 114TTL Port 07 Write lt Set to 170 Press the fourth key to confirm the change The port output then changes and the display shows OPERATIONS Using the Front Panel Controls 3 11 1256E User Manual Publication Number 980873 Rev A Slot 03 114TTL Port 07 Write gt Value 170 lt Viewing a Digital Input Port The 1256 front panel controls allow the user to view the data from input ports of digital I O plug ins For example suppose a 1260 114TTL plug in is installed in slot 3 Also suppose that port 5 of this plug in is configured as an input see Chapter 7 Digital Module Operation for configuration instructions To view the status of port 5 proceed as follows 1 Press the top key next to the display Rotate the knob until the top line reads OPERATIONS Select line 2 next to the top line by pressing the second key The display shows line 2 as being selected gt S OP ERAT LONG gt gt Slot 01 1260 121A lt Channel 00 Status Open Rotate the knob until line 2 shows the contents of slot 3 OPERATIONS gt Slot 03 114TTL lt Port 00 Write Value 255 Press the third key to select line 3 of
132. keyword is optional since it is shown enclosed in square brackets CLOSE and OPEN are the next level keywords The ALL keyword is below the OPEN keyword in this command tree The colon is used to separate keywords from different levels on the command tree Each keyword is separated from the next by a single colon The SCPI commands which may be formed by this tree are shown below a lt channel list gt of 5 0 is used in these examples ROUTE CLOSE 5 0 CLOSE 5 0 ROUTE CLOSE 5 0 CLOSE 5 0 ROUTE OPEN 5 0 OPEN 5 0 ROUTE OPEN 5 0 OPEN 5 0 ROUTE OPEN ALL OPEN ALL Note that the optional ROUTE keyword is omitted in many of the examples Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Each keyword defined by SCPI has both a long form and a short Command form The long form is formed by using all letters shown in the Keyword Long keyword The short form is formed by using only those letters Form and Short shown in upper case in the command tree Form The short form is normally three or four letters in length and ends with a consonant where possible For example the ROUTE keyword may be specified by either of the following ROUT ROUTE since the final e is shown in lower case in the command tree Only the long form or short form may be used For example the keyword DEFINE
133. l list The 1260 line of switching cards used in the 1256 typically utilizes open drain or open collector drivers A separate signal between the coil of each relay and associated driver feeds back into the 1256 for verification and confidence mode checks Verification is somewhat different than confidence mode which is enabled with the MONITOR STATE command With confidence mode enabled the 1256 verifies the state of all relays in a system against expectations after performing any relay state changes i e open or close commands The result of this test is a high level pass or fail indication for the entire system Confidence mode therefore has the ability to quickly test a system but it is unable to resolve or identify the exact cause of the failure if one is detected Unlike confidence mode relay verification can be initiated by the user on a channel by channel basis and can be performed at anytime not just at relay state changes To be able to perform relay verification properly several steps need to be performed 1 Set the proper verification mask indicating whether the readback channel is normal inverted or don t care A channel s mask defaults to don t care For relay cards utilizing open drain drivers virtually all 1260 series relay cards the readback signal will be pulled low by the driver when the driver is enabled high or on state For relay cards the verification mask should be manually set to the inverted mode o
134. lect gt Press the fourth key bottom to select line 4 of the display Rotate the knob until line 4 reads as shown STORE RECALL Type State Config 001 q Do Store Press the fourth key again to store the state into temporary RAM pressing any other key cancels the change Be sure to continue through the steps below to copy the state from temporary RAM to non volatile memory NOTE The temporary RAM is a section of SRAM dedicated to storing an image of the data that will be copied to non volatile RAM Continue with the following steps to copy this image into non volatile RAM If you wish to change additional switch or menu settings and store them in non volatile RAM you may want to save time by storing all changed settings into the temporary SRAM first and then copy the temporary RAM image to non volatile RAM just once 6 Select line 2 next to the top line by pressing the second key Rotate the knob until line 2 of the display reads as shown STORE RECALL gt Type NVRAM lt Config Image Status Erase Press the fourth key bottom to select line 4 of the display Rotate the knob until line 4 reads as shown STORE RECALL Type NVRAM Config Image lt Do Update Press the fourth key again to copy the desired state into non volatile RAM Pressing any other key cancels the Using the Front Panel Controls 3 26 Astronics Test Syst
135. line by pressing the second key just below the first one This highlights line 2 indicated by the gt and lt markers so that you may select the slot to work with OPERATIONS Slot 01 1260 121A Channel O0 Status Open 3 Rotate the knob until line 2 shows the contents of slot 3 OPERATIONS gt Slot 03 1260 118 Channel O0 Status Open 4 Press the third key to select line 3 of the display OPERATIONS Slot 03 1260 118 gt Channel 0 lt Status Open Getting Started 2 6 Astronics Test Systems Publication Number 980873 Rev A Opening a Relay In Case of Trouble Astronics Test Systems 1256E User Manual 5 Rotate the knob until line 3 shows the desired channel number which is 4 in this example OPERATIONS Slot 03 1260 118 Channel 4 Status Open 6 Press the fourth key to select line 4 bottom line Rotate the knob until the display reads OPERATIONS Slot 03 1260 118 Channel 0 Set to Closed 7 Press the fourth key to confirm the closure of the channel The relay then closes and the display shows OPERATIONS Slot 03 1260 118 Channel 0 Status Closed Pressing any other key cancels the change To open a relay follow the steps given in the above section Closing a Relay except in step 7 rotate the knob until the display re
136. ll enabled bits of the Status Byte have returned to 0 The Service Request Enable Register is used to individually enable bits in the Status Byte to set the MSS bit of the Status Byte thereby generating an interrupt When the bit of the Service Request Enable bit is set and the corresponding bit of the Status Byte Register is set then the MSS bit will be a 1 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual CLS Command Astronics Test Systems The following IEEE 488 2 Common Commands relate to the Status Reporting Model CLS Clear status ESE Set the Standard Event Status Enable register ESE Read the Standard Event Status Enable register ESR Read the Standard Event Status register SRE Set the Service Request Enable register SRE Read the Service Request Enable register STB Read the status byte SPE Serial Poll Enable These common commands are described below The CLS command clears the SCPI and IEEE 488 2 defined status event registers These include The Standard Event Status Register is cleared to 0 This register is read using the ESR query The Standard Event Status Enable Register is cleared to 0 This register is set using the ESE command and read using the ESE query The Service Request Enable Register is cleared to 0 This register is set using the SRE command and read using the SRE query The Operation Status Enable Register is cleared to 0 This regis
137. n be saved to non volatile memory For further details on front panel usage refer to Chapter 3 Using the Front Panel Controls The 1256 has the ability to interface with terminals and terminal emulation software Unfortunately a wide variation of capabilities exists in terminal terminal emulators Most terminal terminal emulators generally treat the ENTER key as a carriage return will operate in half duplex mode and have the ability to add linefeeds to incoming carriage returns To minimize frustration and obtain the most legible communications set the terminal terminal emulator to operate in half duplex mode and add linefeeds automatically to incoming carriage returns In this configuration the 1256 should be configured to expect a carriage return only Using this method the terminal display will not have any overwritten lines and be much easier to read and use Another option for terminal terminal emulators that support character translation is to have carriage returns translated into linefeeds In this scenario the terminal terminal emulator still needs to operate in half duplex mode however the 1256 if configured to accept linefeeds only will now send a linefeed with replies This eliminates the need to add linefeeds to carriage returns since no carriage returns come into play on either side The two methods mentioned here are only suggestions and do not cover all possibilities The 1256 is a flexible instrument and will
138. nd query or command is sent When this error occurs an error is added to the error message queue Request Control Bit 1 Bit weight 2 decimal 2 hexadecimal This bit is never set by the 1256 and will always read 0 Operation Complete Bit 0 Bit weight 1 decimal 1 hexadecimal This bit is set when the OPC command is executed This may be used to synchronize the 1256 with the commands to ensure that the 1256 command buffer is empty in this register when the corresponding condition becomes true lt remains set until the ESR query is executed When the query is executed the reply contains the present value of the register and the register is then cleared to 0 The value returned by the ESR query represents a sum of the bit weight values for all conditions that are true For example if the PON bit is set and the QYE bit is set and the rest of the bits are cleared then the value returned for the ESR query is PON QYE 128 4 132 SCPI Command Basics 5 10 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Astronics Test Systems The Standard Event Status Enable Register provides a mask register The value of this register is logically ANDed with the Standard Event Status Register If the value of this ANDing is nonzero then bit 5 of the Status Byte Hegister is set This bit is known as the Event Summary Bit or ESB For example if the PON and QYE bits of the Standard E
139. nnnnnnnnnnannnnnnnnncnnnans 6 3 Astronics Test Systems ix 1256E User Manual Publication Number 980873 Rev A DOCUMENT CHANGE HISTORY Revision Date Description of Change Initial 7 18 05 Document Control release Release Update to current format and revise per ECNO1415 to add clarification of instructions to store settings in non volatile flash in Section 3 A 11 8 12 X Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Chapter 1 INTRODUCTION Overview The 1256 Switching System is a high performance switching and control system in a compact 2U rack mountable package The 1256 can contain up to eight Adapt A Switch plug ins for switching and digital I O These plug ins provide a wide range of switching capability e High current to 13 A e High voltage to 1 kV e RF and microwave to 18 GHz e Digital I O with 96 channels per plug in The user can easily insert these plug ins into the 1256 Switching System to meet the needs of nearly any switching application Figure 1 1 shows a picture of the 1256 Astronics Test Systems Figure 1 1 1256 Switching System Introduction 1 1 1256E User Manual Publication Number 980873 Rev A Features Ease Of Use The 1256 Switching System has many design features to make it easy and convenient to use e Fast Setup There are no configuration jumpers or switches to be set The 1256 is ready to use as soon as the pl
140. nnnnnnnnnnnos 2 1 Figure 2 2 Inserting a Plug In eiii n re Rte e RH do m a neam ates 2 3 Figure 2 3 Numbering of Switch Plug In Slots erem tnt rente 2 4 Figure 2 4 Activating Main AC Power sseessseesessseeeeeneeeneneennn nennen enne nnnnnneter nnne nnne nnne 2 4 Figure 3 1 Front Panel Controls osc scott itta ient e a etta Seo iba ua ek 3 2 Figure 4 1 Connecting the Ethernet Interface oooooonnnnccccccnnnncccnnnnnncnnnncnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnns 4 3 Figure 4 2 Connecting the GPIB Interface oooocconnnnccccncnnnnccncnnnncncnncnnnnnnnnncnnnnnnnnnnncnnnnnnnnnnns 4 12 Figure 4 3 Using the RS 232 Interface ooooonoocccccnncncccnnnonoccncconnncnnnnnannnnnnononcnnnnrnnnnnnnnnnnnnnnnnnnnnnns 4 16 Figure 4 4a Using the 1256 with a Compulter cccccccnnnnnncccnncccnnnnnnnnnnnnnnnonononnnnnnnnnnnnnnnnnnnnnnnnnnnes 4 17 Figure 4 4b Using the 1256 with a Modem oooocccccccccnnonononcccnnnccnnnnnnnnnnnnnnnnncnnnnnnn nono nennen 4 17 Figure 4 5 HyperTerminal Connection Dialog BOX ccooooooooccccnnccccconcoaocncnnnnnnonannnnnnnncnnnnnnnnnnnnannnns 4 26 Figure 4 6 Phone Number Dialog BOX esses nennen nennen nnn 4 26 Figure 4 7 COM Properties Dialog BOX e 2c code reete cor at aa 4 27 Figure 4 8 Main Communications Screen oooooocccccnnccccnncoooonncnnnnccnnnnnnnnnncnnnnnnnnnnncnnnnn nn nnrnnnnnnnnnnnnes 4 28 Figure 4 9 Properties Dialog BOX dere nni e rr 4 29 Figure 4
141. nserting the plug in engage the edges with the card guides of the 1256 Carefully slide the plug in into the chassis until it stops then push it firmly to engage its rear connectors with the 1256 backplane When the plug in is fully seated its panel is flush with the rear panel of the 1256 chassis Each plug in has retainer screws at the ends of its front panel Carefully thread the retainer screws into the 1256 chassis and tighten securely Numbering of Plug In Slots Astronics Test Systems Figure 2 2 Inserting a Plug In The 1256 references each plug in by the number of the chassis slot into which it is installed There are no configuration jumpers or settings Refer to Figure 2 3 Numbering of Switch Plug In Slots Getting Started 2 3 1256E User Manual Publication Number 980873 Rev A Slot 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8 Figure 2 3 Numbering of Switch Plug In Slots For information about connecting the switch plug ins to your Connecting to external hardware refer to the user manuals of the individual plug Plug Ins ins Activatina Main You are now ready to apply power to the 1256 Switching System ctivat 9 ma See Figure 2 4 Activating Main AC Power for instructions on AC Power activating main power To apply power set power switch to 1 An MOV 1 230V 47 62 Hz AN 150 VA MAX 3405 TCPAP TRIG OUT FUSE RANGE TYPE 1 6A T 250 90V 260V 5mm X 20mm
142. o 8 and corresponds to the slot number 1 through 8 of the relay plug in lt channel gt This is a number which identifies a single relay to operate The range of valid values for lt channel gt depends on the particular Adapt A Switch plug in being controlled So to close the relay channel 17 on the plug in with address 3 slot 3 use the command CLOSE 3 17 Multiple channels for a single plug in may be specified using the syntax A lt address gt lt channel gt lt channel gt So the command CLOSE 83 1 5 9 11 may be used to close channels 1 5 9 and 11 on the plug in with address 3 A range of channels for a single plug in may be specified by using the syntax lt address gt channell channel2 This format indicates that all relays between lt channel1 gt and lt channel2 gt are to be operated The command CLOSE 83 1 10 closes channels 1 through 10 inclusive on the relay plug in with address 3 A range of relays and a list of single relays may be mixed in a SCPI Command Basics 5 27 1256E User Manual Naming Relay Cards Defining Module Names SCPI Command Basics 5 28 Publication Number 980873 Rev A command For example the command CLOSE 3 1 10 12 15 17 19 Closes channels 1 through 10 12 15 17 18 and 19 on the plug in with address 3 Multiple relays on multiple plug ins may also be specified In general the syntax
143. ommands follow the rules defined by the SCPI standard SCPI is an acronym for Standard Commands For Programmable Instruments and defines standard command names and syntax rules for commands to the instrument and replies from the instrument SCPI is an ASCII based instrument command language designed for test and measurement instruments SCPI commands are based on a hierarchical structure known as a tree system In this system associated commands are grouped together under a common root thus forming command subsystems Throughout this chapter the following conventions are used for SCPI command syntax Square Brackets Enclose optional keywords or parameters Braces Enclose possible parameters within a command Triangle Brackets lt gt Substitute a value for the enclosed parameter Vertical Bar Separate multiple parameter choices Bold Typeface Letters Designate factory default values Command Only This indicates the command cannot be used in query form Query Only This indicates the command can only be used as a query The command form without the question mark is not allowed SCPI Command Basics 5 1 1256E User Manual SCPI Command Basics 5 2 Publication Number 980873 Rev A To illustrate the SCPI notation a part of the ROUTE command subsystem is shown below ROUTe CLOSe channel list OPEN channel list ALL ROUTE is the root keyword of the command This
144. on 1 5 1256E User Manual Publication Number 980873 Rev A This page was left intentionally blank Introduction 1 6 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Chapter 2 GETTING STARTED M ntin ion You may use the 1256 Switching System on a table or mount it in ount g Opt one a standard NEMA 19 rack See Appendix B Rack Mounting the 1256 for instructions on installing the rack mount kit Option 60 and placing the 1256 in a rack i The 1256 Switching System requires a power input of 90 VAC to Main AC Power 250 VAC 43 Hz to 63 Hz The 1256 requires no adjustments settings or changes in fuse capacity to accommodate variations of voltage and frequency within these ranges Simply connect the 1256 AC power inlet to the power source CAUTION CAUTION A RISK A a Before connecting the unit to a power source make sure that the installed fuse has the capacity marked on the rear panel of the 1256 For instructions on changing the fuse refer to Figure 2 1 Changing Fuse for Main AC Power DO NOT OPEN Fuse Cover Fuse The fuse holder has two slots for a fuse one on the top and one on the bottom Put the fuse in the bottom slot of the fuse holder Leave the top slot empty Fuse Holder Figure 2 1 Changing Fuse for Main AC Power Astronics Test Systems Getting Started 2 1 1256E User Manual Getting Started 2 2 Publication Number 980873 Rev A The 1256 is grounded in
145. onics Test Systems TRIGGER COUNT query The 1256 may be programmed to delay before acting on a trigger This provides the ability to slow down the scan list operation if so desired The TRIGGER DELAY command is used to program the trigger delay The syntax for this command is TRIGger SEQuence DELay trigger delay The trigger delay is a real number between 0 0 and 10 0 The trigger delay is programmed in seconds with a resolution of 1 microsecond This is the resolution and not the accuracy That means that you will receive 0 00000 5 decimal places when you read it Any delay over 10 milliseconds rounds the delay to the nearest 10 milliseconds When a non zero trigger delay is programmed the 1256 performs an idle wait for the trigger delay period before acting on the trigger The present trigger delay may be queried by using the TRIGGER DELAY command Before scanning of channels can be performed the 1256 must be armed Arming is accomplished with the INITIATE command The syntax for the INITIATE command is INITiate IMMediate ON 1 OFF 0 CONTinuous ON 1 OFF 0 The INITIATE IMMEDIATE command arms the 1256 This enables the 1256 to accept new triggers and continue scanning Each time the INIT MMEDIATE command is received by the 1256 it enables triggering for the scan list Each time this command is received the number of elements which may be scanned is set to the tri
146. or this command is shown below SYSTem NVUPD NVUPD The SYSTEM NVUPD and SYSTEM NVUPD query are used to both initiate and determine whether a non volatile update cycle is in progress To improve system reliability and eliminate the need for batteries the 1256 stores configuration information into flash memory The downside of flash memory is that it updates more slowly than battery backed memories To minimize the effects of the flash memory update cycle the 1256 allows individual selections i e include list exclude lists path names menu selections etc to be instantaneously saved into intermediate volatile memory When all of these intermediate operations are completed the SYSTEM NVUPD command starts the actual process of transferring the contents of intermediate volatile memory into non volatile flash memory with a single slower update For example the command SYST NVUPD will cause the 1256 to start the transfer process The command SYST NVUPD will return ACTIVE during the update process and DLE at any other time or after the update process has completed Attempting to change intermediate memory during a flash update cycle is prohibited To illustrate this point sending a MOD SAV while SYST NVUPD returns ACTIVE will cause the 1256 to ignore the request and push an error onto the system error queue SCPI Command Basics 5 41 1256E User Manual Publication Number 980873 Rev
147. orts several system commands These commands generally access errors SCPI standard information as well as user interface issues Additionally the 1256 uses a special command to update non volatile memory Whenever an error is encountered by the 1256 it will perform two actions 1 One of the bits of the Standard Event Status Register will be set This register may be read using the ESR query 2 An error message will be added to the error message queue The error message queue may be read using the SYSTEM ERROR query or SYST ERR Consult Appendix B for a list of error messages and more detailed explanations The error queue holds up to 15 error messages Each time an error is detected by the 1256 it adds a new error to the error queue Each time the SYSTEM ERROR query is received the oldest least recent error message is returned The syntax for this command is shown below SYSTem ERRor The reply to the SYSTEM ERROR query uses the format error code lt error message gt where error code gt This parameter is a numeric value This value is 0 if there are no errors remaining in the error queue This value is negative when an error exists on the error queue error message This parameter is a string enclosed in double quotes The error message provides some additional information about the error Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual
148. pening a Path To open a relay follow the steps given in the above section Closing a Relay except in step 4 rotate the knob until line 4 bottom line of the display reads as shown below PATH CONTROL Select Filter Mask PATH2 Set to Open Then press the fourth key to open the relay Viewing Path States It is easy to view the states of pathnames on a 1256 system from the PATH CONTROL menu 1 Press the top key next to the display Rotate the knob until the top line reads Using the Front Panel Controls 3 15 1256E User Manual Publication Number 980873 Rev A gt PATH CONTROL Select line 3 by pressing the third key PATH CONTROL Select Filter Mask gt PATH1 lt Status Open Rotate the knob until line 3 indicates the desired pathname PATH2 for this example PATH CONTROL Select Filter Mask gt PATH2 lt Status Open Rotate the knob right or left to scan through the pathnames as desired Each pathname when displayed will indicate whether it is open or closed on the fourth line of the display Setting Filter Masks Since a large number of path permutations may exist for a given selection of cards it may take time to scroll through all the possibilities if a large number are defined in the 1256 system To minimize scrolling time on the display filter masks can be easily set from the front panel to limit the pathnames displayed to only those that meet user specif
149. placed by the new data 77 and 78 The index now points to the sixth entry which has a value of 60 The next DIG SYNC DATA command would begin by overwriting this data This final configuration is depicted in Figure 7 1 D Location Data 9 8 7 6 5 Index gt 4 3 40 2 30 1 20 0 10 Figure 7 1 A Port 4 Data after DIG SYNC DATA 7 4 10 20 30 40 Digital Module Operation 7 10 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Location Data Index gt 9 8 90 7 80 6 70 5 60 4 50 3 40 2 30 1 20 0 10 Figure 7 1 B Port 4 Data after DIG SYNC DATA 7 4 50 60 70 80 90 Location Data 9 8 90 7 80 6 70 5 60 4 50 Index gt 3 40 2 30 1 20 0 10 Figure 7 1 C Port 4 Data after DIG SYNC INDEX 7 4 3 Astronics Test Systems Digital Module Operation 7 11 1256E User Manual Publication Number 980873 Rev A Location Data 9 8 90 7 80 6 70 Index gt 5 60 4 78 3 77 2 30 1 20 0 10 Figure 7 1 D Port 4 Data after DIG SYNC DATA 7 4 77 78 The query form of the command may be used to read the present index location for the specified port For example the command DIGITAL SYNC INDEX 7 4 would return the reply 5 The DIGITAL SYNCHRONOUS DATA query may be
150. port 7 of this plug in is configured as an output Using the Front Panel Controls 3 10 Astronics Test Systems Publication Number 980873 Rev A Astronics Test Systems 1256E User Manual see Chapter 7 Digital Module Operation for configuration instructions To change the output of port 4 proceed as follows 1 Press the top key next to the display Rotate the knob until the top line reads OPERATIONS Select line 2 next to the top line by pressing second key The display shows line 2 as being selected OPERATIONS Slot 01 1260 121A Channel 0 Status Open Rotate the knob u ntil line 2 shows the contents of slot 3 OPERATIONS gt Slot 03 114TTL lt Port 00 Write Value 255 Press the third key to select line 3 of the display port number OPERATIONS Slot 03 114TTL gt Port 00 Write lt Value 255 Rotate the knob until line 3 shows the desired port number which in this example is 7 and the desired mode which is Write OPERATIONS Slot 03 114TTL gt Port 07 Write lt Value 255 Line 4 now shows the current states of the eight bits of port 7 expressed as an eight bit decimal number By default the display uses decimal notation To change the notation to hexadecimal or binary refer to the Display Format section in this chapter under the Settings heading Press the fourth
151. r consists of three logical registers a condition register an enable register and an event register If any bit is set in the operation event register bit 7 of the status byte register will also be set The Operation Status Condition Register holds the present condition of various instrument attributes This register is a set of 1 bit flags The conditions assigned to the bits of the register are shown below Digital trigger event Bit 7 Bit weight 128 decimal 80 hexadecimal Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Astronics Test Systems This bit is set when a trigger event occurs on a 1260 114 digital IO card Waiting For Arm Bit 6 Bit weight 64 decimal 40 hexadecimal This bit is set when a Scan List has been defined but the 1256 is not armed Use the INIT IMMEDIATE or INIT CONTINUOUS command to arm the 1256 Waiting for Trigger Bit 5 Bit weight 32 decimal 20 hexadecimal This bit is set when a Scan List has been defined and the 1256 has been armed but is waiting for a trigger The TRIGGER SOURCE command may be used to select a trigger source If the trigger source is BUS then the TRG command will satisfy a trigger Settling Bit 1 Bit weight 2 decimal 2 hexadecimal This bit is set when the relays are settling due to a CLOSE OPEN or SCAN operation This bit is cleared after the settling time has elapsed All of the other bits of this register are not
152. ram shows that the 1256 must be armed before it responds to triggers Once it is armed it remains armed and sequences through the scan list until the number of triggers equal to the trigger count is received After that it is disarmed and must be rearmed again The 1256 may also be manually disarmed with the ABORT command Advanced SCPI Operations 8 10 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Sy Command ABORT ARMED Trigger Received es ls Thiet Ld J Scan Action Complete Command INIT IMMEDIATE and Triggers lt Trigger Count p Scan Action Complete amp OS Triggerz Trigger Count 4 N N Command TRIG IMMEDIATE a IDLE gt SCAN Scan Action Complete After N TRIG IMMEDIATE Ss oe TON AO n E Trigger Received d TRIGGER ARMED ACTION E SCAN Command ABORT CONTINUOUS Scan Action Complete EC LS d Figure 8 1 State Transition Diagram For Arming and Triggering the 1256 Generating a Single The 1256 may be armed and a single trigger may be sent using Trigger the TRIGGER IMMEDIATE command The syntax for this command is TRIGger SEQuence IMMediate This command is equivalent to the following A Programming the trigger source B Arming the 1256 with an INIT IMMEDIATE command C Sending a single trigger on the selected trigger source This command may be used to execute the next step of a scan list Astronics Test S
153. re expected if terminal baud rate is not set to 115 200 Ignore unintelligible text that is received immediately after power turn on Remote terminal receives unintelligible text from 1256 No intelligible text is received at all Astronics Test Systems Baud rate of 1256 not matched to baud rate of terminal Set baud rate of 1256 to match that of the data terminal see Chapter 4 GPIB and RS 232 Interfaces under the heading Setting the Baud Rate Parity setting of 1256 not matched to parity of terminal Number of data bits setting of 1256 not matched to number of bits for terminal Set parity of 1256 to match that of the data terminal see Chapter 4 GPIB and RS 232 Interfaces under the heading Setting the Data Bits Stop Bits and Parity Set number of data bits of 1256 to match that of the data terminal see Chapter 4 GPIB and RS 232 Interfaces under the heading Setting the Data Bits Stop Bits and Parity Slow data terminal response usually when using an older terminal Set number of stop bits of 1256 to 2 see Chapter 4 GPIB and RS 232 Interfaces under the heading Setting the Data Bits Stop Bits and Parity Troubleshooting C 3 1256E User Manual PROBLEM Publication Number 980873 Rev A WHAT TO DO POSSIBLE CAUSES e Baud rate too high for cable and terminal being used Change to a lower baud rate Make sure that the new 1256 baud rate matches th
154. re lt port gt 7 4 OUTPut 7 5 DATA port list data list 255 0 n a 7 5 maximum minimum for each data byte INPut port list 7 6 SYNChronous 7 7 maximum minimum for each data byte DATA port data list 255 0 n a 7 9 DATA lt port gt 7 15 INDex port list index 7 10 INDex port list 7 15 POINts port number of points 256 0 0 7 17 POINts port 7 17 CLEar port list Command Only 7 16 CLOCK 7 16 POLarity module list NORMal INVerted BUSY 7 16 POLarity module list NORMal INVerted IEEE 488 2 Common Commands 5 6 IDN Query Only 5 17 RST Command Only 5 17 TST Query Only 5 19 CLS Command Only ESE lt register value gt 255 0 0 5 14 ESE 5 15 ESR Query Only 5 15 SPE 5 20 SRE lt register value gt 255 0 0 5 15 SRE 5 16 STB Query Only 5 16 OPC 5 16 OPC 5 16 TRG Command Only 5 21 SAV lt state gt Command Only 0 100 100 5 19 RCL lt state gt Command Only 0 100 100 5 19 OPT Query Only WAI 5 21 no function in the 1256 Astronics Test Systems SCPI Command Reference 6 5 1256E User Manual Publication Number 980873 Rev A This page was left intentionally blank SCPI Command Reference 6 6 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual General Digital Module Ports Asynchronous Digital Operation Astronics Test Systems Chapter 7 DIGITAL MODULE OPERA
155. red change s to settings first and Astronics Test Systems Using the Front Panel Controls 3 23 1256E User Manual Publication Number 980873 Rev A then proceed to the section Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Setting the Screen Saver Timeout When the screen saver is enabled it blanks the screen after no controls have been operated for a certain period of time The purpose is to maximize display life The time interval is adjustable from one minute to one hour To set the time interval proceed as follows 1 Press the top key next to the display Rotate the knob until the top line reads SETTINGS lt Select line 2 next to the top line by pressing the second key Rotate the knob until line 2 of the display reads Type Display eese SETTINGS gt Type Display lt Option Format Status Hex Press the third key to select line 3 of the display option Rotate the knob until line 3 of the display reads eet SETTINGS Type Display gt Option Timeout lt Status 1 min If line 4 already shows the desired timeout value then no further action is necessary Otherwise select line 4 Then rotate the knob until line 4 shows the desired value This example uses 15 min asas SETTINGS Type Display Opt
156. rface Basic RS 232 Information Equipment Required Computer Interfaces 4 14 Publication Number 980873 Rev A the fourth key Rotate the knob until line 4 indicates the desired address In this example 15 is the desired address See SETTINGS Type GPIB Option Address lt Update 15 Then press the fourth key to confirm the update Pressing any other button cancels the change NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up The 1256 may generate a service request SRQ in response to a variety of events These events include detecting a programming error or confidence mode failure generating a response to a query and many others Consult the IEEE 488 2 Status Description section in Chapter 5 SCPI Command BASICS for a description of how to program the 1256 to generate a service request The RS 232 interface provides a simple way to control the 1256 from virtually any computer Nearly every computer has a serial Com port The only extra hardware required is a serial cable This section gives information about connecting the 1256 to the comp
157. rument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Setting the GPIB The 1256 as a GPIB bus member must be assigned a unique Address address This address can be set only by means of the front panel controls Set the address to a number from 0 to 31 as follows 1 Press the top key Rotate the knob until the top line reads SETTINGS lt 2 Select line 2 next to top line by pressing the second key This selects line 2 PRESS SETTINGS gt Type Display lt Option Format Status Decimal 3 Select the GPIB settings mode by rotating the knob until line 2 reads as shown below lines 3 and 4 may differ Saas SETTINGS gt Type GPIB lt Option Lockout Status Disabled 4 Press the third key to select line 3 of the display Rotate the knob until line 3 reads as shown below EAE SETTINGS Type GPIB gt Option Address lt Status 14 5 If line 4 of the display already indicates the desired address number then no further action is necessary Otherwise press Astronics Test Systems Computer Interfaces 4 13 1256E User Manual Service Request SRQ Using the RS 232 Inte
158. s mode mn Output values 10 20 30 to port 1 in synchronous mode G Read 5 data bytes from port 2 in synchronous mode H Read 256 data bytes from port 3 in synchronous mode Digital Module Operation 7 16 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Astronics Test Systems I Output the value 44 to port 4 55 to port 5 88 to port 8 and 99 to port 9 in asynchronous mode J Input a byte from ports 6 7 10 and 11 in asynchronous mode Resets the 1260 114 modules to power up defaults RST Enable ports 0 1 4 5 8 and 9 as output ports Others are defaulted by RST as input ports DIG STATE 7 0 1 4 5 8 9 ON Sets ports 0 to 3 as synchronous ports 4 to 11 as asynchronous DIG CONF 7 4 Loads the data bytes 1 2 3 and 4 into port O buffer DIGS SYNCsDATA 07 0 1 2 3 4 Loads the data bytes 10 20 and 30 into port 1 buffer DIG SYNC DATA 7 1 10 20 30 Set the number of points to 5 for port 2 DIG SYNC POINTS 7 2 5 Set the number of points to 256 for port 3 DIG SYNC POINTS 7 3 256 Outputs 44 to port 4 55 to port 5 88 to port 8 and 99 to port 9 DIG OUTPUT 7 4 5 8 9 44 55 88 99 Commands the 1260 114 to read the data The reply will be a set of 4 data byte values in decimal format separated by commas DIG INPUT 7 6 7 10 11 Enables the synchronous mode for module 7 DIG SYN
159. s selected rotating the knob changes the contents of that line 2 Select line 2 next to top line by pressing the key just below top key The display describes the plug in that is in slot 1 OPERATIONS gt Slot 01 1260 121A Channel O0 Status Open Getting Started 2 5 1256E User Manual Publication Number 980873 Rev A In this example the plug in is 1260 121A Lines 3 and 4 indicate the status of the plug in discussed later 3 Rotate the knob one click to the right clockwise to check the contents of the next slot slot 2 OPERATIONS gt Slot 02 1260 138A Channel O0 Status Open The plug in is 1260 138A 4 Continue to rotate the knob to view the contents of the remaining slots If any of the installed switch modules do not appear on the display as you scroll through the slot numbers refer to Appendix C Troubleshooting to correct the problem To use the IEEE 488 or RS 232 interfaces to verify plug ins see Chapter 5 SCPI Command Basics Look under the heading Checking for Installed Plug Ins The front panel controls may be used to close relays on the plug Closing a Relay ins For example suppose a 1260 118 plug in is installed in slot 3 To close relay channel 4 on this plug in proceed as follows 1 Press the first key next to the display Rotate the knob until the top line reads OPERATIONS 2 Select line 2 next to top
160. s used the user defines a list of channels to operate Each time a trigger is received by the 1256 the presently closed channel is opened and the next channel on the list is closed This capability may be used in conjunction with a Digital Multimeter DMM or other measurement device to allow a group of measurements to be made without having to program the 1256 for each relay operation For example without the Scan List feature for each DMM reading you must A Program the 1256 to close a channel B Wait Query the 1256 to ensure the channel is closed Advanced SCPI Operations 8 13 1256E User Manual Publication Number 980873 Rev A C Program the DMM to take a reading D Program the 1256 to open a channel With the Scan List feature the DMM and 1256 are programmed to trigger each other for each DMM reading After this sending a trigger to the 1256 intiates the cycle of Close Relay Take DMM Reading Open Relay automatically When all of the desired readings have been made the DMM may be read to obtain the group of measurements This method usually results in increased measurement rate by minimizing the command processing time of the instruments involved To set up the Scan List the programmer must A Program the 1256 to define the list of channels to scan through using the SCAN command B Program the 1256 to select an input trigger source This input trigger source should be the external trigger input The TRIGGER
161. sac Sata ata pe Al A 4 Mechanical caca tenements das ob nes Savin tato i ves aa Antes aaa yes aan tects A 4 DDE NGG Braco dl do Meade B 1 RACK MOUN TINO dt B 1 tems neluded creia ed apad E ame be asd tue B 1 Installing Rack Mount BARS t coste Sto n Eae emu var tubae mess tme tu B 1 Installing the 1256 Chassis Into a Rack usina B 2 ADOSI A E E 64 TROUBLESHOOTING enit nene cares UR E ED Farc tac Cdi DAR EA edes at dicho ERR HALO cu ERE CM C 1 HOW Io Use tliis SON aa C 1 Power ltd iia ode C 1 Front Panel Gontrols j uiis ctii e a eoe a e a C 2 H5232 Remote MLCT ACG sarta bitu oes ob elt oracle apra CCP pe C 3 IEEE 488 GPIB Remote Interface eet da C 5 vi Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual PUG a Mod le T P P C 5 Non Volatile M rnory ecce re tree e C 6 Astronics Test Systems vii 1256E User Manual Publication Number 980873 Rev A List of Figures Figure 1 1 1256 Switching System oocoooonnocccncnccnnncnnnonancnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnne nnn nnne 1 1 Figure 1 2 1256 Features Front Panel veni putet reed PR ette Ee pude eto RR Cr un dava ei Ee pd CE 1 2 Figure 1 3 1256 Features Rear Panel esses nennen nennen nennen 1 3 EIQUre 754 JDIEIGHISIOTTS ecco edente Sete ceca Rite sod a noe Oe Bact be 1 3 Figure 2 1 Changing Fuse for Main AC Power ococcccnooocccccccccnnccnnnnnnnnnnnnnnnncnnnnnnnnnnnnnnnnnann
162. sing a data terminal or a computer with terminal emulation software it is recommended that you set the 1256 to use the CR only terminator In this case also set the data terminal or computer to half duplex operation local echo with line feed appended to incoming messages see your data terminal manual for information on how to do this NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up The 1256 allows the user to set the following additional RS 232 parameters e Data bits Data bits per frame The RS 232 interface allows either 7 or 8 bits per data frame For most applications set this to 8 e Stop bits Stop bits at end of each frame The RS 232 interface can insert either one or two stop bits at the end of each data frame Slow data terminals may require the extra delay resulting from two stop bits However for most applications one stop bit is sufficient e Parity Type of parity checking Parity checking provides a level of confidence that data has been received properly When parity checking is used an extra bit the parity bit is inserted at the end of each data frame T
163. st 6 digits follow the decimal point Integer values may be sent in the command using decimal octal hexadecimal or binary values The default base for values is decimal To specify a hexadecimal value use the prefix H To specify an octal value use the prefix HQ To specify a binary value use the prefix B The following values are all equivalent 123 123 decimal B1111011 1111011 binary 123 decimal H7B 7B hex 123 decimal 0173 173 octal 123 decimal When an integer value is returned In a reply from the 1256 the value will be a decimal number Discrete parameters are used to program settings that have a limited number of values Parameters are NOT case sensitive As an example of the discrete parameter the TRIGGER SOURCE command is specified as TRIGger SOURce BUS HOLD IMMediate EXT Meaning the parameter must be one of the following BUS HOLD IMM SCPI Command Basics 5 23 1256E User Manual Boolean Parameters SCPI Command Basics 5 24 Publication Number 980873 Rev A IMMEDIATE EXT Note that just like command keywords discrete parameters may be specified using either the long form or the short form Whenever a discrete parameter is used the query form of the command returns the SHORT form of the parameter value in upper case characters That is the command may be specified using either IMMEDIATE or IMM but the query T
164. t 5 2 5 28 CLOSe 5 38 6 1 OPEN channel list 5 2 5 27 OPEN 5 37 6 1 ALL Command Only 5 2 6 1 SCAN lt scan list gt 8 15 PATH 5 33 CATalog Query Only 5 35 DEFine path name gt close channel list 5 36 open channel list gt DEFine path name gt 5 36 no chan list for query DELete 5 35 NAME path name gt Command Only 5 35 ALL Command Only 5 35 SAVe Command Only 5 33 RECall Command Only 5 33 MODule 5 29 8 3 CATalog Query Only 5 31 LIST module list Query Only 5 38 DEFine module name gt module number 5 29 DEFine module name gt 5 29 no module number for query DELete 5 31 NAME module name gt Command Only SAVe Command Only 5 33 RECall Command Only 5 33 CONFigure lt module list gt BBM MBB IMMediate BBM 8 1 no relay mode for query CONFigure module list 8 1 EXCLude channel list 8 5 no exclude list EXCLude 8 5 DELete channel list gt 8 6 ALL 8 6 INCLude lt channel list gt 8 2 INCLude 8 2 DELete lt channel list gt 8 2 ALL 8 2 MONItor 8 17 STATe ON OFF 1 0 5 25 VERify MASK channel list 0 1 X Astronics Test Systems SCPI Command Reference 6 3 1256E User Manual Publication Number 980873 Rev A Table 6 1 Continued Command Max Min Default Seepage Notes MASK channel list SAVE RECALL STATE ON OFF 1 0 VERi
165. t BNC AC power input IEC System Analog Bus Four two wire buses on backplane for interconnecting the plug ins Non Volatile Memory 101 non volatile memory locations for storage of switch states and user preferences Additional power on state Switch Settling Time Automatically selected by 1256 according to each plug in Astronics Test Systems Specifications A 1 1256E User Manual Remote Interface IEEE 488 GPIB Compliance Address Selection Publication Number 980873 Rev A IEEE 488 2 Manual via front panel controls RS 232 Hardware Protocol Data Communications Equipment DCE Connects directly to computer COM port with straight through cable no null modem Baud Rates 1 200 2 400 4 800 9 600 19 200 38 400 57 600 115 200 Start bits 1 Stop bits 10r2 Number of bits 7 or8 Parity Even odd none Flow Control Software XON XOFF Hardware RTS CTS TCP IP Ethernet Protocol TCP IP Connects directly to computer COM port with straight through cable no crossover Speed 10Base T 10 M bit s 100Base TX 100 M bit s Command Set SCPI Identical to current 1260 Series switch family except for modifications to triggering functions to accommodate non VXIbus operation Software Drivers Drivers and soft front panels provided for all Adapt A Switch plug ins Specifications A 2 Astronics Test Systems Publication Number 980873 Rev A Electrical Power Supply Type AC Input DC Supply Output Env
166. t the GPIB interface via the front panel controls as follows Selecting the GPIB Interface 1 Press the top key Rotate the knob until the top line reads pe SETTINGS lt 2 Select line 2 next to top line by pressing the second key This selects line 2 so that you may select the type of setting to work with a SETTINGS gt Type Display lt Option Format Status Decimal 3 Select the remote interface settings mode by rotating the knob until line 2 reads as shown below lines 3 and 4 may differ SETTINGS gt Type Remote lt Option Lockout Status Disabled 4 Press the third key to select line 3 of the display Rotate the knob until line 3 indicates the Source option as shown below RN SETTINGS Type Remote gt Option Source lt Status GPIB 5 If line 4 of the display already indicates the status as GPIB Computer Interfaces 4 12 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual then the GPIB interface is already active no further action is necessary Otherwise press the fourth key Rotate the knob until line 4 indicates GPIB SETTINGS Type Remote Option Source lt Update GPIB Then press the fourth key to confirm the update Pressing any other button cancels the change NOTE Menu preferences are not normally retained after the power is removed from the inst
167. ter is set using the STATUS OPERATION ENABLE command This register can also be read using the STATUS OPERATION ENABLE query The Operation Status Event Register is cleared to 0 This register is read using the STATUS OPERATION EVENT query The Questionable Status Enable Register is cleared to 0 To set this register the STATUS QUESTIONABLE ENABLE command is issued To read this register the query STATUS QUESTIONABLE ENABLE indicates whether this feature is enabled The Questionable Status Event Register is cleared to O It is read using the STATUS QUESTIONABLE EVENT Query SCPI Command Basics 5 13 1256E User Manual ESE Command ESE Query SCPI Command Basics 5 14 Publication Number 980873 Rev A The ESE command sets the value of the Standard Event Status Enable Register The value of this register is logically ANDed with the contents of the Standard Event Status Register see the ESR query description If any bits of this AND operation are set then bit 5 of the Status Byte is set Bit 5 is known as the Event Summary Bit or ESB and is shown in Figure 2 3 ESB of Status Byte bit O of ESE AND bit 0 of ESR OR bit 1 of ESE AND bit 1 of ESR OR bit 2 of ESE AND bit 2 of ESR OR bit 3 of ESE AND bit 3 of ESR OR bit 4 of ESE AND bit 4 of ESR OR bit 5 of ESE AND bit 5 of ESR OR bit 7 of ESE AND bit 7 of ESR where ESE is the value as set by the ESE command ESR is the value whic
168. the 1260 114 modules are programmed to operate in the asynchronous mode data is written to the output pins immediately upon receipt of the DIGITAL OUTPUT command Likewise the data is read from the input pins immediately upon receipt of the DIGITAL INPUT command Digital Module Operation 7 1 1256E User Manual Synchronous Digital Operation Mixing Synchronous and Asynchronous Modes of Operation Digital Module Operation 7 2 Publication Number 980873 Rev A When the 1260 114 modules are programmed to operate in the synchronous mode data will be clocked in and out of the module by using the CLKIN line on the module s edge connector To output data in the synchronous mode one must A Enable the drivers on the ports B Tell the 1256 which ports of the module are to be used as synchronous ports C Load data into the memory of the 1256 D Arm the 1260 114 module E Generate TTL level pulses on the CLKIN pin of the module One data pattern is written per clock pulse To input data in the synchronous mode one must A Disable the drivers on the ports B Tell the 1256 which ports of the module are to be used as synchronous ports C Tell the 1256 how many data bytes will be read from the ports D Arm the 1260 114 module E Generate TTL level pulses on the CLKIN pin of the module One data pattern is read per clock pulse F When the number of bytes specified in step C has been captured the 1260 114 a
169. the SCAN command is shown below ROUTe SCAN lt scan list gt DELete ALL SCAN The lt scan list gt is the same as a lt channel list gt used with the CLOSE OPEN and PATH commands but with one addition special keywords may be used to indicate that all channels controlled by the 1256 are placed in the state as recalled from nonvolatile memory In short the lt scan list gt is comprised of A Individual channel designators Examples 3 0 6 37 1 323 B A list of single channels separated by commas 3 0 2 4 6 7 9 2 1 10 C A range of relays separated by a colon 3 1 8 7 10 2 D A path name Pathl Thispath E A state name State names begin with the letters STATE and end with a number between 0 and 100 The following are valid state names STATEO STATE7 State53 Statel00 For example the commands PATH DEF example 7 0 5 10 13 SCAN 81 323 4 0 2 5 8 5 example 1 0 statel4 1 224 Define a path name example and then define a SCAN list Each time a trigger is received the next channel path or state in the scan list is closed after the previous channel or path is opened Using the SCAN command example above the following Advanced SCPI Operations 8 15 1256E User Manual Publication Number 980873 Rev A sequence of actions occurs A After a trigger is received channel 323 of module 1 is closed B After the next trigger channel 1 323 is
170. the display port number OPERATIONS Slot 03 114TTL gt Port 00 Write Value 255 Rotate the knob until line 3 shows the desired port number which in this example is 5 and the desired mode which is Read OPERATIONS Slot 03 114TTL gt Port 05 Read lt Value 43 Now line 4 shows the states of the eight input signals of port 5 expressed as an eight bit decimal number By default the display uses decimal notation To change the notation to hexadecimal or binary refer to the Display Format section of this chapter under the Settings heading If desired rotate the knob in either direction to view the states of other digital ports Ports programmed as inputs reflect the states of their input signals Ports configured as Using the Front Panel Controls 3 12 Astronics Test Systems Publication Number 980873 Rev A Path Control Menu Astronics Test Systems 1256E User Manual outputs show the most recent data written to them Enabling a Digital Port Before using a digital port as an output its output buffers must be enabled For example suppose a 1260 114TTL plug in is installed in slot 3 To enable output port 4 proceed as follows 1 Press the top key next to the display Rotate the knob until the top line reads 2 OPERATI LONS 2 Select line 2 next to the top line by pressing the second key The display shows line 2 as being selected
171. the range from O through Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual SPE Command 100 If lt location gt is not specified the instrument state will be saved into non volatile memory location 100 State 0 is recalled at power up The 1256 is shipped without any data in state 0 This effectively tells the 1256 to open all relays at power up This default may be overwritten by placing all relays in the desired power up state and then executing the command SAV 0 In the manner indicated earlier a separate SYSTEM NVUPD command must follow to actually update the non volatile memory If new relay modules are added to the system after the SAV 0 command has been executed the new relay modules will not be programmed at power up Also if module addresses are changed after the execution of the SAV 0 command the modules whose addresses have changed will not be programmed In general whenever new modules are added or module addresses are changed then the SAV 0 command should be used to place the relays of the new modules into the desired power up state The status byte is returned to the controller in response to a Serial Poll Enable SPE message The status byte carries the following information Astronics Test Systems Bit Number Bit Value Description 1 LSB 1 Unused 2 2 Unused 3 4 Unused 4 8 Scan list at break point 5 16 Ready 6 32 Programming error 7 64 Ser
172. thods for identifying and locating these problems The 1256 supports an operational mode that performs a high level system wide verification When Confidence Mode is enabled the 1256 checks the status of all switches after it closes or opens any of them The syntax for the command is shown below ROUTe MONitor STATE ON 1 OFF O If any relay is not in the correct state and Confidence Mode is enabled the 1256 pushes an error message onto the system error queue and asserts the Execution Error bit in the Event Status Register If the 1256 is accessed through the GPIB interface this condition can further be made to generate an SRQ interrupt This is Advanced SCPI Operations 8 17 1256E User Manual Publication Number 980873 Rev A accomplished by writing a 1 into the Execution Error mask bit of the Standard Event Status Register and a 1 into the ESB mask bit of the Service Request Enable Register When Confidence Mode is enabled commands are executed more slowly because of the time consumed in reading the status of all relays The amount of slowdown depends on the quantity and types of switch modules that are installed Using Relay The 1256 system also supports the ability to verify that a switch or Th A a range of switches is closed or open The syntax for these Verification commands is shown below ROUTe gt VERify ALL MASK channel list 0 1 X MASK channe
173. tion Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Computer Interfaces 4 4 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Entering the Ethernet Communication Settings Astronics Test Systems When connecting the 1256 to an Ethernet network you must assign it a unique TCP IP address a gateway and a subnet mask The front panel controls must be used to make these settings Two modes are available Dynamic Host Configuration Protocol In this mode a network server automatically provides an IP address gateway and subnet mask for the 1256 Manual In Manual Mode the user assigns a static IP address gateway and subnet mask to the 1256 Using DHCP Addressing To select the DHCP mode proceed as follows 1 Press the top key which will select line 1 top line Rotate the knob until the top line reads Pa ees SETTINGS lt Select line 2 next to top line by pressing the second key Rotate the knob until the display shows Remote TCP IP in line 2 lines 3 and 4 may differ ae SETTINGS Type TCP IP lt Option IP Oct 1 Status 0 Press the third key selecting line 3 Rotate the knob until line 3 reads as follows line 4 may differ wi SETTINGS Remote TCP IP gt Option Addr_Mode lt Status
174. tly Defined Path Names SCPI Command Basics 5 34 Publication Number 980873 Rev A The syntax for these commands is ROUTe PATH Jg DELete path name gt ALL The following examples illustrate the use of this command Removes the name path1 ROUTE PATH pathl Removes the name testit PATH DEL testit Removes all path names PATH DEL ALL The PATH CATALOG command may be used to read back all of the presently defined path names The format for this command is ROUTe PATH CATalog The reply to this command consists of the presently defined path names each of which is separated by a comma Path names are stored internally in upper case characters by the 1256 These upper case names are returned in the reply For example suppose the following commands have been executed PATH DEFINE dmm 2 pinl 1 117 2 17 PATH DEFINE dmm 2 pin2 01 116 2 14 7 23 PATH DEFINE cntr_2 pinl 61 217 2 24 PATH DEFINE cntr 2 pin2 81 216 2 37 7 3 Then the query PATH CAT returns the reply DMM 2 PIN1 DMM 2 PIN2 CNTR 2 PIN CNTR 2 PIN2 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Reading the Channel List for a Path Name Storing Path Names in Non Volatile Memory Closing Relays Astronics Test Systems The module address associated with a module name may be rea
175. top key next to the display Rotate the knob until the top line reads SETTINGS 2 Select line 2 next to the top line by pressing the second key Rotate the knob until line 2 of the display reads Type Remote as follows Seo SETTINGS gt Type Remote lt Option Lockout Status Disabled 3 Select line 3 by pressing the third key Rotate the knob until line 3 reads as shown below Seo SETTINGS Type Remote gt Option Source lt Status RS 232 4 Line 4 now indicates the remote interface source that is active The choices are TCP IP Ethernet GPIB and RS 232 If the choice shown is not the desired one then rotate the knob until the correct choice is displayed Ra SETTINGS Type Remote Option Source lt Update TCP IP Then update to this choice by pressing the fourth key The display now reads Has SETTINGS Type Remote Option Source gt Status TCP IP lt Before using the remote interface set the communication parameters See Chapter 4 Computer Interfaces NOTE Menu preferences are not normally retained after the power is Using the Front Panel Controls 3 18 Astronics Test Systems Publication Number 980873 Rev A Astronics Test Systems 1256E User Manual removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the s
176. toring the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up Setting the Display Intensity The display intensity brightness is adjustable to accommodate different ambient lighting conditions It may be set to 25 50 75 or 100 of its maximum brightness To set the display intensity proceed as follows 1 Press the top key next to the display Rotate the knob until the top line reads S a gt SETTINGS lt 2 Select line 2 next to the top line by pressing the second key Rotate the knob until line 2 of the display reads Type Display pese SETTINGS gt Type Display lt Option Format Status Hex 3 Press the third key to select line 3 of the display option Then rotate the knob until line 3 of the display reads as follows ae SETTINGS Type Display gt Option Intensity lt Status 75 4 If line 4 already shows the desired intensity then no further action is necessary Otherwise select line 4 Then rotate the knob until line 4 shows the desired intensity This example uses 50 Side SETTINGS Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Type Display Option Intensity lt Update 50 Then press the fourth key bottom to update the status Pressing any other key cancels the
177. trol selection select SETTINGS on the top line then select Type RS 232 on the second line and then Option FlowCtrl on the third line Then choose the appropriate setting on the bottom line The default power up state of the instrument is no flow control To select a different power up state this setting like all SCPI Command Basics 5 25 1256E User Manual Reply Output Buffer SCPI Command Basics 5 26 Publication Number 980873 Rev A other menu options can be saved to non volatile memory For further details on front panel usage refer to Chapter 3 Using the Front Panel Controls The 1256 waits for a linefeed carriage return or carriage return line feed will also work in RS 232 mode if the 1256 is configured properly or GPIB EOI terminator before any command is parsed If 1024 characters are sent to the 1256 without any terminators the 1256 will flush both input and output buffers and then queue and error message Because the 1256 uses an input buffer to store commands it is possible that multiple CLOSE or OPEN commands may be stored in the input buffer before the first command is executed To synchronize the application program with the 1256 and to ensure that relays are in the programmed state a query may be sent to the 1256 Once the reply to the query is read you can be sure that the relays are in the programmed state For example the following command sequence may be used CLOSE
178. ug ins have been inserted e Flexible Controller Interface The controller host computer may communicate with the 1256 using Ethernet IEEE 488 GPIB or RS 232 interfaces This allows an external computer to automate the operation of the 1256 e Front Panel Controls The front panel controls provide an intuitive user interface for manually controlling the plug ins and setting user preferences The front panel controls also provide access to all interface parameters such as Ethernet IP address GPIB address and RS 232 baud rates These controls are often helpful during system setup e Command Set Commonality The 1256 supports the Standard Commands for Programmable Instruments SCPI Language This command set is used in other switching platforms such as 1260 Series VXI For an introduction to the SCPI command set and its usage see Chapter 5 SCPI Command Basics For a complete description of all SCPI commands for the 1256 see Chapter 6 SCP Command Reference Front and Rear Figures 1 2 and 1 3 show the features of the front and rear Panels panels respectively Figure 1 4 gives the physical dimensions of the 1256 chassis Keypad and LEDs Display Knob Y Speaker Figure 1 2 1256 Features Front Panel Introduction 1 2 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Note Earlier versions may not be equipped with Ethernet capability and may have different connector layout
179. ule is disarmed DIG SYNC STATE 7 This queries the present arm state of each of the following modules 7 8 9 and 10 DIGITAL SYNCHRONOUS STATE 87 10 The reply consists of a single 1 or O for each port Each state indication is separated by a comma For example the reply 0 1 0 0 indicates that module 8 is armed while modules 7 9 and 10 are not Reading Data from a Once the data transfer is complete each of the synchronous input Synchronous Input jJ ri read data rom the synchronous np pors s eh The following examples illustrate the use of this query Reads all of the data from port 4 of module 7 DIG SYNC DATA 807 4 The reply to this query consists of a series of numeric values each separated by a comma For example the following reply could be returned This indicates that seven data bytes were stored by the module from port 4 255 0 128 93 66 17 23 Reads all of the data from port 11 of the module whose name is digio The name must have been defined using the MODULE DEFINE command DIG SYNC DATA digio 11 Digital Module Operation 7 14 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual The number of points stored in the port memory for a synchronous input port may be read using the DIGITAL SYNCHRONOUS INDEX query This query will return the number of data points stored for the specified port s One numeric reply is returned
180. ure that the display shows the SETTINGS Remote TCP IP menu cius SETTINGS Remote TCP IP Option IP Oct 1 Computer Interfaces 4 9 1256E User Manual Using the IEEE 488 GPIB Interface Basic GPIB Information Computer Interfaces 4 10 Publication Number 980873 Rev A Status 0 2 Select line 3 Rotate the knob until line 3 appears as shown below Remote TCP IP gt Option Addr_Mode lt Status Man_Set 3 Select line 4 Rotate the knob until line 4 reads as shown below Se SETTINGS Remote TCP IP Option Addr Mode Update Man Use Then press key 4 again to confirm The 1256 is now ready for TCP IP communications NOTE Menu preferences are not normally retained after the power is removed from the instrument To make a menu preference s permanent make the desired change s to settings first and then proceed to the section Storing the Menu Preferences to make the changes permanent Following this procedure will put the settings into non volatile memory and allow them to be restored during instrument power up The GPIB standard permits up to 15 devices including the controller to interconnect and reside on a single bus GPIB cables have identical stackable connectors at each end allowing several cables to connect to a single source System devices and instruments may be interconnected in almost any desired configuration There must be a p
181. used Some commands accept a more general form of specifying multiple ports This is shown in the command syntax as a lt port list gt A lt port list gt uses the format lt module address gt lt port range gt module address port range where the lt module address gt is a number in the range 1 through 12 or a module name The lt port range gt is a sequence of port speciifiers separated by commas A lt port range gt may be a lt port number gt where a single port number is specified The port number is in the range 0 to 11 Or lt port1 gt lt port2 gt where two individual ports are specified Each of these is a number in the range 0 to 11 Or lt port1 gt lt port2 gt which specifies a range of inclusive ports All ports between lt port1 gt and lt port2 gt are included Each of lt port1 gt and lt port2 gt is a number in the range 0 to 11 Astronics Test Systems Digital Module Operation 7 3 1256E User Manual Selecting the Mode of Operation Digital Module Operation 7 4 Publication Number 980873 Rev A Examples of lt port list gt are shown below Port 0 on module 7 7 0 Ports 0 and 11 on module 7 7 0 11 Ports 0 through 11 on module 7 87102117 Port 0 on module 7 port 4 on module 8 07 0 8 4 Ports 0 2 and 3 on module 7 ports 7 through 11 on module 8 7 0 2 3 8 7 11 The mode of operation may be selected using the DIGI
182. ut the module generates an interrupt to the Pins 1256 The 1256 responds to this interrupt by writing the next data byte from each synchronous output port and reading a new data byte from each synchronous input port The BUSY status line on the 1260 114 module is asserted until the 1256 is ready to accept a new CLKIN line Any new CLKIN pulses received while the BUSY line is asserted will be ignored The CLKIN signal is edge sensitive The active edge is positive at power up and after a RST command This may be set to the negative falling edge by using the command DIG SYNC CLOCK INVERTED command It may be set back to the positive rising edge by using the command DIG SYNC CLOCK NORMAL The BUSY signal is active high after power on and after a RST command This may be set to be active low by sending the command DIG SYNC BUSY INVERTED and may be set back to active high using the command DIG SYNC BUSY NORMAL Synchronous and To illustrate a command sequence assume module 7 is a 1260 Asynchronous 114 module The following command sequence may be used to Example gt Select ports O and 1 as synchronous output ports UJ Select ports 2 and 3 as synchronous input ports O Select ports 4 5 8 and 9 as asynchronous output ports U Select ports 6 7 10 and 11 as asynchronous input ports m Output values 1 2 3 4 to port 0 in synchronou
183. uter via serial cable setting up the 1256 for serial port operation and communicating with the 1256 by using a terminal emulation program To use the RS 232 interface you need an RS 232 data terminal or a computer equipped with an RS 232 serial port such as the COM Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Connecting to a Computer or Data Terminal Astronics Test Systems port of a personal computer In addition a shielded cable is required for compliance with the radiated emissions standards specified for the 1256 A shielded RS 232 cable suitable for connecting the 1256 to a computer is available from Astronics Test Systems RS 232 Cable 10 feet 3 meters P N 602248 DTE Versus DCE All equipment with an RS 232 interface must be designed as either Data Communications Equipment DCE or Data Terminal Equipment DTE depending upon the end of the communications link from which it will operate Computers are usually DTE and modems are DCE This allows a straight through connection where connector pins 1 2 3 at one end connect to pins 1 2 3 respectively at the other end The 1256 is designed as DCE to facilitate direct connection to a computer or data terminal DTE Connecting to a modem requires a null modem described in the section Connecting to a Modem Electrical Connection Using a shielded RS 232 cable connect the nine pin female RS 232 connector on
184. utomatically disarms itself G Read the number of data bytes captured from the 1256 Both synchronous and asynchronous modes of operation may be used on a 1260 114 module simultaneously The following restrictions apply A You cannot use the asynchronous read command DIGITAL INPUT to read data from a synchronous port B All synchronous ports on a module must be contiguous The synchronous ports are always the lower numbered ports on the module The synchronous ports begin with port 0 and go through port N The asynchronous ports begin with port Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual N 1 and go through port 11 For example if the last synchronous port is 7 then ports 0 through 7 will use the synchronous mode and ports 8 through 11 will use the asynchronous mode The following paragraphs describe the commands used to operate the 1260 114 modules Specifying Ports on When a lt port gt is shown on the command syntax it represents the i combination of the module address and the port number The a Digital Module syntax for a lt port gt is lt module address gt lt port number gt where lt module address gt is a number in the range 1 through 12 or a module name defined using the MODULE DEFINE command This selects the 1260 114 or 1260 114C module The lt port number gt is a value in the range O through 11 This selects which of the 12 ports on the module will be
185. value 1 to port 5 of module 7 output 2 to port 11 of module 7 and output 3 to port 4 of module 8 DIGITAL OUTPUT 7 5 11 8 4 1 2 3 The DIGITAL INPUT query is used to read data from the port The lt port list gt specifies which ports will be read The reply to this query is a comma separated list of values one per port Data are returned in decimal values Examples of this query are shown below Read data from port 4 of module 7 and return the data in the reply An example of the reply is 37 DIG INPUT 7 4 Read data from ports 1 through 6 in reverse order from the 1260 114 or 1260 114C with module address 11 DIGITAL INPUT 11 6 1 Digital Module Operation 7 6 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual An example reply is 38 44 255 0 94 77 which indicates that port 6 read a value of 38 port 5 read a value of 44 port 4 read a value of 255 and so on When data is read from an enabled output port the data should equal the last value written to that port using the DIGITAL OUTPUT command Using the The syntax for the synchronous mode commands is shown below Synchronous Mode DIGital of Operation SYNChronous STATe lt module list gt ON OFF 1 O DATA lt port gt lt data list gt DATA port INDex lt port list gt lt index gt INDex port list POINtsS port number of points
186. vent Status Register are set but the Standard Event Status Enable Register value is 0 then the ESB of the Status Byte Hegister will not be set If either or both bits 7 and bit 2 of the Standard Event Status Enable Register are set then the ESB bit of the Status Byte Register will be set Another way of viewing the Standard Event Status Enable Hegister is that it selects which conditions reflected in the Standard Event Status Hegister are enabled to set the ESB bit of the status byte The Status Byte Register is similar to the Standard Event Status Register Each bit of this register reflects the true or false condition of the corresponding bit These bits reflect the PRESENT value of the condition whereas the Standard Event Status Register bits are latched That is once a bit in the Standard Event Status Register is set it remains set until a CLS command is executed or an ESR Query is executed However the bits of the Status Byte Register change states as the corresponding condition becomes true or false These bits are NOT latched Also the Status Byte is not cleared by reading the register Each bit of the Status Byte remains set until the condition indicated by the bit is no longer present The following bits are assigned in the Status Byte Register All other bits are not used and will return 0 when read with the STB query OSE Operation Status Event Bit 7 bit weight 128 decimal 80 hexadecimal This bit is set when any
187. vice requested 8 MSB 128 Unused SCPI Command Basics 5 19 1256E User Manual TRG Command WAI Command SCPI Status Registers SCPI Command Basics 5 20 Publication Number 980873 Rev A NOTE When bit 7 of the status byte Service Requested is set to show that SRQ is asserted the 1256 will not respond to any GPIB commands until the interrupt has been serviced Servicing may be done with a serial poll After the interrupt has been serviced the error code generated must be obtained via GPIB Bits 6 and 7 are cleared after each Serial Poll Enable SPE command Bit 5 is cleared by sending instructions to the 1256 and is set when the 1256 finishes executing a command These transitions coincide with the rising and falling edges respectively of the External Trigger Out signal All status bits are active high The TRG command is required by the IEEE 488 2 specification If the 1256 is armed see the INIT IMMEDIATE and INIT CONTINUOUS commands and the trigger source is BUS see the TRIGGER SOURCE command then this will cause the next scan list action to occur This is equivalent to sending a GPIB bus trigger The WAI command is required by the IEEE 488 2 specification This command is accepted but has no effect on the 1256 SCPI defines two additional registers beyond those shown in Figure 5 1 These are the Operation Status Register and the Questionable Status Register The Operation Status Registe
188. wed but not changed Using Static Addressing In Manual Mode the user decides what static IP address gateway and sub net mask to use and enters them manually The first step is to put the 1256 into Manual Set mode to allow setting of the TCP IP parameters Before attempting to use static or manual addressing on a 1256 several important things must be kept in mind Do not randomly assign an address to the 1256 Duplicate or incorrect addresses on a central network can cause unpredictable problems and failures that are difficult to identify and trace They also tend to be intermittent which further compound troubleshooting efforts If the 1256 will be used on a central network contact the network administrator for an assignment or a block assignment of addresses Make sure that the assigned subnet mask for a 1256 system is consistent with the class of network For example a class C network i e 192 168 X X would typically have a subnet mask of 255 255 255 0 A class B network i e 172 16 X X would typically have a subnet mask of 255 255 0 0 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Astronics Test Systems Most private networks found inside commercial industrial environments are typically contiguous which means that one instrument can communicate directly to other computers and equipment without the assistance of an intermediate gateway In this situation the gatewa
189. wnloaded to any synchronous output port on the module equals the value returned by DIGITAL SYNC INDEX 2 The greatest number of data points defined for any synchronous input port on the module equals the value returned by DIGITAL SYNC POINTS All data operations are complete when the module disarms itself The DIGITAL SYNCHRONOUS STATE query may be used to determine if the specified module s are armed or disarmed Digital Module Operation 7 8 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Setting Up the The DIGITAL SYNCHRONOUS DATA command is used to load data into the memory of the 1260 114 This defines the data that Synchronous Test will be clocked out one byte per CLKIN pulse Each synchronous output port may hold up to 256 data bytes Each byte may have a value between 0 and 255 Each time the DIGITAL SYNCHRONOUS DATA command is executed new data bytes are added to any data that was previously downloaded For example the commands DIG SYNC DATA 7 4 10 11 12 DIG SYNC DATA 7 4 50 60 70 80 90 DIG SYNC DATA 7 4 255 254 are equivalent to the command DIG SYNC DATA 7 4 10 11 12 50 60 70 80 90 255 254 The DIGITAL SYNCHRONOUS INDEX command provides flexibility for loading new data to output This command sets the location at which the next DIG SYNC DATA command will download The value passed as the index for this command must satisfy the follow
190. y address need not be specified in the 1256 If the 1256 exists in a network that has individual subnets isolated by gateways or bridges the gateway parameters must also be specified or the 1256 will only be able to communicate with computers and equipment local to its own subnet To select manual mode proceed as follows 1 Press the top key which will select line 1 top line Rotate the knob until the top line reads ESTE SETTINGS lt Select line 2 next to top line by pressing the second key Rotate the knob until the display shows line 2 as follows lines 3 and 4 may differ Se SETTINGS gt Remote TCP IP lt Option IP Oct 1 Status 0 Press the third key selecting line 3 Rotate the knob until line 3 reads as follows line 4 may differ SETTINGS Remote TCP IP gt Option Addr_Mode lt Status Auto_DHCP If line 4 already indicates the Manual Set mode no further action is necessary Otherwise select line 4 Rotate the knob until the display reads PRSES SETTINGS Type TCP IP Option Addr Mode Update Man Set Then press key 4 again to select the Manual Set mode This temporarily disables the TCP IP interface allowing you to change the TCP IP settings Computer Interfaces 4 7 1256E User Manual Publication Number 980873 Rev A Setting the TCP IP Address 1 Once you have selected the Manual Set Mode you may s
191. y removing the screws that secure them 2 Remove two pan head allen screws from each side of the chassis They are the top and the bottom screws Refer to the diagram in Figure B 1 3 Secure rack mount ear Item 1 to the unit using 6X32 panhead screws Item 2 as shown 1256 MAINFRAME Figure B 1 Installing the Rack Mount Ears Astronics Test Systems Rack Mounting B 1 1256E User Manual Publication Number 980873 Rev A CAUTION DO NOT attempt to support the mainframe in the rack with the rack mount ears only Right angle runners or a base plate MUST be used to support the mainframe Installing the 1256 Slide the instrument fully into the rack on previously installed right angle runners Figure B 2 or a base plate until the rack mounting Chassis Into a Rack ears strike the front rail Secure the instrument in place using two each side Phillips Pan Head 6 32 x 3 4 screws Item 2 Fixed Rack Mount installation is now complete Right angle runners already installed Figure B 2 Rack Mounting Rack Mounting B 2 Astronics Test Systems Publication Number 980873 Rev A 1256E User Manual Appendix C TROUBLESHOOTING How to Use this If you have difficulty using the 1256 Switching System refer to the following troubleshooting tables If you are still unable to Section resolve the problem contact the Astronics Test Systems Customer Support Department Power Up PROBLEM POSS
192. ystems Advanced SCPI Operations 8 11 1256E User Manual Output Trigger Signals from the 1256 Selecting an Output Trigger Destination Publication Number 980873 Rev A The 1256 may be programmed to generate an output trigger pulse each time a relay operation has been completed The output trigger pulse may be placed on the external trigger output found on the rear panel of the 1256 Refer to Figure 8 2 External Trigger In and External Trigger Out for connector location and signal information This trigger pulse may be used to inform other instruments that the relay s have settled and a new measurement may take place The OUTPUT TRIGGER command is used to enable or disable the external trigger line The syntax for this command is OUTput TRIGger STATe ON 1 OFF O Once the trigger output is enabled it may be disabled by A Deselecting the line using the OFF parameter B Sending the RST command For example the following commands may be sent To enable the external trigger output OUTPUT TRIGGER ON To disable the external trigger output OUTP TRIG 0 The present destination for the trigger output pulse may be read by sending each of the following queries OUTPUT TRIG If the trigger output is disabled the reply to this query will be a 0 If an output trigger is enabled the reply will be 1 A delay may also be used to prevent the trigger form getting to the UUT until a

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