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3.8.3.2 Using SRQs to Input Data

The 4863 can be set to monitor the status inputs, digital lines or the EDR
flip-flop and generate an SRQ (2363 generates a SRM) when selected input
signals change state. The signal changes are collected in the individual
event registers and summarized in the Status Byte Register. Refer to the
488.2 Status Structure in Figure 3-2.

When the SRQ is sensed, the user queries the Status Byte and then the
appropriate event register to determine the cause of the SRQ. The following
example generates an SRQ whenever the EDR flip-flop becomes set
(external data is ready) or the Status A signal goes low (In the example of
2.10, the external device has lost power).

Setup:

STAT:OPER:PTR 4

'enables bit 2 to set on EDR

STAT:OPER:NTR 1

'enables bit 0 to set on a nega-
tive transition of Status A

STAT:OPER:ENAB 5

'enables Event bits 0 and 2

*SRE 128

'Status Byte bit 7 enabled

After the SRQ occurs:

Serial Poll the 4863
If Status Byte bit 5 is on then
        Read the ESR Register
    If ESR bit 6 then
              Read the input data
    Else
       Report error!!!
   End If
Else If Status Byte bit 7 is on then
      Print "External Unit off line" + (TIME)

Beep

Else
Report error!!!
End If

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Содержание 4863

Страница 1: ...ICS ELECTRONICS ICS MODEL 4863 GPIB Parallel Interface MODEL 2363 Serial Parallel Interface 4863 2363...

Страница 2: ...al Parallel Interface Instruction Manual 7034 Commerce Circle Pleasanton CA 94588 Phone 925 416 1000 Fax 925 416 0105 Publication Number 120143 Web Site http www icselect com October 2006 Edition Rev...

Страница 3: ...maycauseinterference to radio communications The Model 4863 and 2363 have been tested and found to comply with the limits for a Class A computing device pursuant to Subpart J of Part 15 of the FCC Ru...

Страница 4: ...63 General Operation GPIB Address 488 2 Status Structure 488 2 Commands SCPICommands SingleLetterCommands Programming Guidelines and Serial Interface Operation Theory of Operation Describes the 4863 a...

Страница 5: ...ii This page left intentionally blank...

Страница 6: ...48 programmable digital lines with TTL levels for controlling devices or for data transfer The digital interface is user configurableintogatedinputsand orlatchedoutputsineightbitincrements As inputs e...

Страница 7: ...blinking the front panel LEDs before displaying their normal Power on Ready condition The 4863 is a member of ICS s Minibox product family and is packaged in a small metal case that is less than 1U 1...

Страница 8: ...your unit 4863 X General Model Number Option Codes 1 Special Crystal 3 Custom Paint 5 Custom Front Panel 6 Special Settings 7 Special Program 8 Hardware Modification A Ship with Australian 230 Vac Ada...

Страница 9: ...er is provided to remote the LEDs and the power switch is removed A separate header is provided for the optional serial interface The Digital I O connectorremainsthesame RefertoFigure1 6fortheOEMBoard...

Страница 10: ...ponds to a single primary address and secondary addresses 00 and 01 The lower address is used for commands the upper address is used for transparent data transfer Valid primary addresses are 0 to 29 f...

Страница 11: ...SCPI Parser The 4863 and 2363 include an extended SCPI parser that complies with the SCPI Standard Version 1994 0 1 4 6 Buffers The 4863 and 2363 use the same input and output buffers Buffer size is...

Страница 12: ...at 7 or 8 data bits odd even or no parity Stop Bits 1 or 2 stop bits 1 5 2 RS 232 Interface The RS 232 Interface has the following characteristics Signals BA BB and AB Mode Full Duplex with or without...

Страница 13: ...Command Echo Message Terminator Prompt CNTL E On Response CR LF CR LF CNTL F Off Response LF LF The user should not attempt to send a new command until it has completed the current command Echo mode...

Страница 14: ...II number 0 9 with a hex value of 30 3F An example is the IDN query sent to a 2363 at address 4 i e STX 4 I D N LF Promptsaresupportedwhennetworkaddressingisenabled Thetransmitter is enabled until the...

Страница 15: ...here ASCII characters 0 to 1F hex are reserved for message control ASCII characters 20 7F are for address and data Address character is 30 3F hex STX is ASCII character 02 hex ETX is ASCII character 0...

Страница 16: ...X characters Active EDR edge and Inhibit signal polarities are selected by configuration commands The EDR F F is reset when the data is read or by the SENSE RESET EDR command or by a Device Clear Stan...

Страница 17: ...TRG or 488 1 GET commands Pulse polarityisdefinedbyconfigurationcommand Signallevelssameasoutput levels in paragraph 1 6 1 1 6 6 Reset Output Resetoutput ispulsedby488 2 RSTor RCLcommandandwhentheuni...

Страница 18: ...nput inhibits data transfer Status B may be used as a request for the 4863 to go to the local state The 4863 will deassert the Remote output in response to a true Status B input if the unit is not in...

Страница 19: ...dTDav is the time to output first byte on GPIB Bus Figure 1 1 Input Data Timing DAV Pulses Data Lines Data Strobe TdStb TdOut TdOut is delay from command terminator to data output TdStb is the delay f...

Страница 20: ...5 sec TdSTB Delay from comd terminator to pulse SOUR DATA STR 7 5 ms DATA STR 6 3 ms SP 0 8 to 1 1 ms TdStb2 Delay to next data strobe SOURCE DATA hhhh hhhh 140 s DATA hhhh hhhh 140 s PO hhhh hhhh 140...

Страница 21: ...t Format HEX HANDshake Enables Output Handshaking OFF CLEar Sets Clear pulse active level 0 EDR Sets EDR input active level 0 INHibit Sets Inhibit output active level 1 REMote Sets Remote output activ...

Страница 22: ...Clear pulse active level 0 EDR Sets EDR input active level 0 INHibit Sets Inhibit output active level 1 REMote Sets Remote output active level 0 RESet Sets Reset pulse output active level 0 STRobe Se...

Страница 23: ...onds during which time the PWR indicator is on At the end of the self test the unit displays its current GPIB or network address by blinking it address on the front panel LEDs for a half a second If t...

Страница 24: ...ge 40 C to 70 C Humidity 0 90 RH without condensation Shock Vibration Normal handling only Construction All metal case 4863 Power 9 to 32 Vdc 3 VA unloaded outputs Connectors IEEE 488 Interface Amphen...

Страница 25: ...1 20 1 Figure 1 5 Outline Dimensions 18 52 cm 254 cm End View 3 86 cm Side View 0375 Maximum Connector Clearance 18 92 cm Switch...

Страница 26: ...M Board Outline Dimensions J2 Digital I O Connector 25 J5 GPIB Header 1 J4 Serial Header 150 TYP 150 TYP MAX COMPONENT HEIGHT 187 in 4 40 UNC STAND OFF 25 DIA X 187 26 J7 Remote LED Header 62 42 21 43...

Страница 27: ...of US FCC Docket 20780andcomplieswithEECStandardsEN55022and 50082 1 CE Certificate of Compliances reproduced in Figures 1 7 and 1 8 UL CSA VDE AC Wall adapter has applicable UL CSA VDE and CE approva...

Страница 28: ...1 23 1 Figure 1 8 2363 Certificate of Compliance...

Страница 29: ...04705 IEEE 488 Bus Cables multi shielded design in 104740 0 5 1 2 and 4 meter lengths standard connectors 104505 IEEE 488 Bus Cables multi shielded design in 104520 0 5 1 and 2 meter lengths with a st...

Страница 30: ...l sales representative immediately Also call the carrier immediately and retain the shipping carton and packing material for the carrier s inspection ICS will make arrangements for the unit to be repa...

Страница 31: ...ctive program lets you enter and query all of the configuration settings and is the most flexible configuration method The Minibox configuration programs guide you through a menu driven configuration...

Страница 32: ...USB 488 PCI 488 PCILt 488 PCM and 488 cPCI Cards Measurement Computing or National Instruments Cards See para 2 7 DOS Supported card or Interface mconfig exe ICS 488 PC2 Card National Inst GPIB PC2a C...

Страница 33: ...OM port in the PC with a Serial Cable See Section 2 7 Plug the AC adapter plug into teh DC jack in the 4863 s rear panel Plug the AC adapter into an AC outlet GPIB Bus Cable AC Adapter 4863 GPIB Port...

Страница 34: ...d back on The unit will display its primary GPIB address at the end of its self test routine by blinking its LEDs A double blink indicates the unit is in the dual secondary address mode The LED bit we...

Страница 35: ...o continue 10 Saving the New Settings The program will ask if you want to save the current configuration Enter Y to save N to continue Theprogrammayaskifyouwanttolocktheinterfaceconfiguration paramete...

Страница 36: ...the 2363 s network address by one of the following methods a Use the factory default value of 4 for new units b If you do not know your unit s address turn the unit off and back on The unit will disp...

Страница 37: ...SE 32 EOTMode Call Send Bd Addr ESE EOTMode Instring String Lin 32 fills the string with spaces Call Receive Bd Addr Instring Term Print A Displays the result IfyouenteredaninvalidcommandandtheredERRL...

Страница 38: ...20 primary 20 secondary 0 CmdStr SYST COMM GPIB ADDR MODE DUAL Call Send Bd Addr CmdStr EOTMode Instring String Lin 32 fills the string with spaces Call Receive Bd Addr Instring Term Print Instring 8...

Страница 39: ...UT ENTERCOMMANDSTRING orHELPforDirections A 310 IF A HELP THEN GOSUB 520 320 IF A SPOL THEN GOSUB 650 330 IF A DATA THEN GOSUB 720 340 IF A CMD THEN GOSUB 770 350 IF A ENTER AND A XXX THEN 360 PRINT O...

Страница 40: ...RUPT OCCURRED 650 PRINT Serial Polling now 660 Stat SPOLL Adr 670 PRINT SRQ SPOLL RESULTS Adr Devadr Status Stat 680 PRINT 690 A XXX 700 ENABLE INTR 7 710 RETURN 720 REM DATA mode 730 PRINT DATA Addre...

Страница 41: ...1 180 A SYST COMM GPIB ADDR 190 OUTPUT Adr A END 200 ENTER Adr B 210 PRINT Device address B 220 INPUT Enter new device address 0 30 Newadr 230 A SYST COMM GPIB ADDR 240 OUTPUT Adr A Newadr END 250 WA...

Страница 42: ...lti shielded cables to minimize noise pickup Limit the total GPIB bus cable length to 20 meters Refer to the appendix for a GPIB signal pin list if one is needed or contact ICS for more information ab...

Страница 43: ...16 contain RS 485 signals and should not be connected to any RS 232 level signals Check standard RS 232 cables to be sure these pins are open before plugging the cable into a 2363 Table 2 1 lists the...

Страница 44: ...ve resistors R5 R6 and R7 from the PC board These resistors are located near the front of the PC board between the PWR and RDY LEDs The 2363 s RS 485 port can be tested by using a RS 232 to RS 485 con...

Страница 45: ...Use the mating connector supplied with the unit and follow the directions in Sections 2 9 to connect the OEM Board to the host equipment 2 7 3 1 Power Connections DC power is connected to the 4867 236...

Страница 46: ...ces and male connectors DB 25P for DTE devices Because the 4863 only has Tx and Rx signals the user can easily makeaDataTerminal DTE orDataCommunication DCE styleinterface for the end product by addin...

Страница 47: ...DE 9P J4 Header Pin Pin Pin Signal RxD 2 3 2 Receive Data TxD 3 2 3 Transmit Data RTS 7 7 CTS 8 8 DSR 6 GND 5 5 7 GND DCD 1 DTR 4 4 DSR 6 6 5 Vdc thru 3 K 2 7 3 3 LED Header The LED Header J7 contains...

Страница 48: ...s GPIB Connector Address Switch Assembly although any GPIB connector and address switch may be used with the OEM Board ICS sGPIBConnector AddressSwitchAssembliesaresmall PCassemblies that mount a GPIB...

Страница 49: ...D 2 IFC 13 ORG 2 NDAC 14 YEL 2 EOI 15 GRN 2 ATN 16 BLU 2 SRQ 17 VIO 2 DIO1 18 GRY 2 DIO2 19 WHT 2 DIO3 20 BLK 2 DIO4 21 BRN 3 DIO5 22 RED 3 DIO6 23 ORG 3 DIO7 24 YEL 3 DIO8 25 GRN 3 GROUND 26 BLU 3 a...

Страница 50: ...tes Switch show set to address 4 Rocker S used for Address 0 Figure 2 8 Address Switch Layout 2 7 3 5 Board Jumpers 4863 2363s have two jumpers on the PC board as shown in Figure 2 6 The jumper functi...

Страница 51: ...2 22 2 1 This page intentionally left blank...

Страница 52: ...t data strings can be used to transfer data in multiple byte wide words Bytes used by the string commands must be configured into input or output strings by the configuration commands Depending upon t...

Страница 53: ...tring Characters in a data string can be HEX characters user assigned ASCII characters ASCII numbers or binary characters When HEX or user assigned ASCII characters are used each character represents...

Страница 54: ...ve the bytes unassigned for direct byte I O or assign multiple bytes into Talk input or Listen output strings Bytes assigned to strings must be assigned in numerical order and can start with any byte...

Страница 55: ...MSN 3 Bit 8 58 CH 11 Byte 2 Bit 2 MSN 3 Bit 4 38 CH 10 Byte 2 Bit 1 MSN 3 Bit 2 17 CH 9 Byte 2 Bit 0 MSN 3 Bit 1 59 CH 24 Byte 3 Bit 7 MSN 4 Bit 8 54 CH 23 Byte 3 Bit 6 MSN 4 Bit 4 34 CH 22 Byte 3 Bi...

Страница 56: ...MSN 10 Bit 4 26 CH 46 Byte 6 Bit 5 MSN 10 Bit 2 5 CH 45 Byte 6 Bit 4 MSN 10 Bit 1 47 CH 44 Byte6 Bit 3 LSN Bit 8 27 CH 43 Byte 6 Bit 2 LSN Bit 4 6 CH 42 Byte 6 Bit 1 LSN Bit 2 48 CH 41 Byte 6 Bit 0 L...

Страница 57: ...atus A input is in its logic 1 state Holding the Status A input in the logic 0 state inhibits data transfer User programs the Strobe polarity and enables disables Listen Handshaking 2 8 7 Trigger Outp...

Страница 58: ...t Sets number of Talk bytes POLarity Sets Input data polarity HANDshake Enables Input Handshaking EDR Sets input polarity of edge INH Sets inhibit output polarity TALK Selects Input String Format TRAN...

Страница 59: ...ve foot long cable terminated into a 62 pin connector Table 2 9 lists the cable wire colors Figure 2 10 4863 Open End Cable Connector 2 Make a rough determination of the number of output and input sig...

Страница 60: ...2 MSN 3 Bit 4 Wht of Blu Wht CH 10 Byte 2 Bit 1 MSN 3 Bit 2 Grn of Grn Red CH 9 Byte 2 Bit 0 MSN 3 Bit 1 Red of Red Vio CH 24 Byte 3 Bit 7 MSN 4 Bit 8 Brn of Org Brn CH 23 Byte 3 Bit 6 MSN 4 Bit 4 Grn...

Страница 61: ...f Grn Blk CH 45 Byte 6 Bit 4 MSN 10 Bit 1 Brn of Brn Blu CH 44 Byte6 Bit 3 LSN Bit 8 Wht of Wht Grn CH 43 Byte 6 Bit 2 LSN Bit 4 Blk of Grn Blk CH 42 Byte 6 Bit 1 LSN Bit 2 Blu of Brn Blu CH 41 Byte 6...

Страница 62: ...g enabled status EDR polarity and Inhibit polarity 5 If output data is being transferred by a string command the output data lines should be assigned next Start with the lowest available byte in Table...

Страница 63: ...eir signals should be connected now Assign the signals to the remaining data lines All signals on a byte should go in the same direction Record the device signal names and pin numbers in Table 2 7 or...

Страница 64: ...could be read either transparently or with the PORT 2 3 query Typical in range responses are 199 to 199 The Overrange signal is wired to bit 8 of the 100s digit so Overrange responses are 999 or 999...

Страница 65: ...t 8 58 2 Overrange CH 11 Byte 2 Bit 2 MSN 3 Bit 4 38 gnd 0 CH 10 Byte 2 Bit 1 MSN 3 Bit 2 17 gnd 0 CH 9 Byte 2 Bit 0 MSN 3 Bit 1 59 3 100s 1 CH 24 Byte 3 Bit 7 MSN 4 Bit 8 54 4 10s 8 CH 23 Byte 3 Bit...

Страница 66: ...6 CH 46 Byte 6 Bit 5 MSN 10 Bit 2 5 40 Control bit 2 CH 45 Byte 6 Bit 4 MSN 10 Bit 1 47 41 Control bit 1 CH 44 Byte6 Bit 3 LSN Bit 8 27 CH 43 Byte 6 Bit 2 LSN Bit 4 6 42 LED 3 CH 42 Byte 6 Bit 1 LSN B...

Страница 67: ...nd of message string 10 LF Listen String OUTput Sets Listen bytes 4 5 POLarity Sets Output polarity 0 HANDshake Enables Output Handshaking OFF STRobe Sets Output Strobe polarity 0 LISTen Sets Output F...

Страница 68: ...otocol can be saved in Flash and are automatically recalled at power turn on or when the unit is reset Data transfer between the computer and the 4863 and 2363 s digital interface can be by a combinat...

Страница 69: ...e primary address two consecutive primary addresses or a primary address with two secondary addresses The data transfer capabilities of the different address modes are shown below in Figure 3 1 The up...

Страница 70: ...he sum of the binary bits in a byte or binary bytes 4863 only If listen handshaking is enabled data transfer will only occur if the Status A input signal is in its logic true state Data overrun is be...

Страница 71: ...on the 4863 restores the last configuration and output values stored in its Flash memory by the SAV 0 command as the current configuration These values are used until a command is sent to the 4863 wi...

Страница 72: ...OEM Board Differences OEM Board versions of the 4863 are available with various interface combinations Board configurations with GPIB capability have an GPIB signal header with extra inputs for readi...

Страница 73: ...ted the primary address range is limitedfrom1to30 The4863cannotrecognizesecondaryaddresseswhen set to primary address 0 The selected address setting and mode is stored in the 4863 s Flash Follow the d...

Страница 74: ...occurred and or that the unit needs service There are three major sources of SRQs eachofwhichissummarizedintheStatusByteRegister Twoofthesources are event registers with their own enabling bits and th...

Страница 75: ...ration Condition Register Not Used 15 10 9 8 7 6 5 4 3 2 1 0 Transistion Register WTG Status A Questionable Event Register Questionable Enable Register 15 14 7 6 5 4 3 2 1 0 15 Digital Inputs CH Numbe...

Страница 76: ...any changes in the digital inputs Bit alignments are shown in Figure 3 2 The Questionable Transition Register filters the inputs and passes only the enabled state changes to the Questionable Event Reg...

Страница 77: ...ghoranopencontact Alogical0isalowinputofacontact closure to ground To read the Questionable Condition Register use the following SCPI query STAT QUES COND reads the status inputs The response is a dec...

Страница 78: ...in bit 4 of the Status Byte Register when it contains a message s to be read by the bus controller Reading the Output Queue by addressing the 4863totalkatitsGPIBaddressclearsthesummarybit IftheOutput...

Страница 79: ...ESE 192 SRE 32 enables Power on and EDR bits Note that the ESE and SRE commands must be on the same line or set prior to the PSC 0 command to be saved A later PSC 1 command sets the PSC flag which wi...

Страница 80: ...ds to the state 1 or 0 of bits in the register 4863 returns the value of the Event StatusRegister andthenclearsit value is an integer whose binary equivalent corresponds to the state 1 or 0 of bits in...

Страница 81: ...ng selected 4863 operations have been finished PlacesanASCIIcharacter1intothe4863 s Output Queue when all pending selected 4863 operations have been finished Controls the automatic power on clearing o...

Страница 82: ...corresponds to the state 1 or 0 of bits in the register If value is not between 0 and 255 an Execution Error is generated 4863 returns the value of the Service Request Enable Register with bit six se...

Страница 83: ...SCPI commands in the 4863 2363 are not case sensitive The portion of the command shown in capitals denotes the abbreviated form of the keyword Either the abbreviated or whole keyword may be used when...

Страница 84: ...UD numeric value 9600 PARity EVEN ODD NONE BITS 7 8 SBITs 1 2 RS485 1 0 NETwork OFF ADDRess PACKet ADDRess 0 15 4 UPdate ERRor 0 No error VERSion 1994 0 CONFigure Configure Strings DIGital INPut chann...

Страница 85: ...9 LISTen ASCii HEXL HEX 4833 BINary HEX FL ROUTe Bit Manipulation CLOSe byte bit CLOSE OPEN byte bit OPEN RESET byte BRESET SENSe Bit Sense BIT byte bit READ BYTE byte BREAD DIGital Port Input DATA VA...

Страница 86: ...NABLE PTRansition 0 h7FFF All 1s PTRansition NTRansition 0 h7FFF 0 NTRansition QUEStionable Digital Inputs EVENt bits 0 14 active 0 CONDition bits 0 14 active 0 ENABle bits 0 14 active 0 ENABLE PTRans...

Страница 87: ...AL DEFault command resets the Flash to it factory settings Caution All user settings will be overridden by this command 12 Most parameters can be output in various numeric formats radix The parameters...

Страница 88: ...e GPIB address instead of the value saved in Flash Values 0 1 or OFF ON MODE SINGle Selects GPIB address mode Single mode uses one primary address to transfer data with commands Dual enables two con s...

Страница 89: ...OFF selects no protocol and uses standard ASCIIcharactermessagesforpoint to point operation ADDRess enables ICS s net work protocol When network is enabled every serial message has to be preceded by a...

Страница 90: ...mmand error 200 Execution error 400 Query error VERSion 1994 0 4863 returns the value of the applicable SCPI version number CONFigure Starts string configuration branch DIGital Optional digital data i...

Страница 91: ...ignal both EDRs in 4803 A value of 1 selects positive signal transition A value of 0 selects negative signal edge Values are 0 1 INH 1 Sets the active level for the Inhibit output signal both Inhibits...

Страница 92: ...th a linefeed BINary placeseachinputbytedirectlyintotheGPIB output buffer without any conversion BINary output is terminated by asserting EOI on the last character Values are ASCii HEX HEXL TABLE BINa...

Страница 93: ...bit manipulation branch CLOSe Sets a bit to the logic true value set by the SOURCe DATA PORTn POL command Bit is defined by a byte bit parameter Byte value is 1 to n bit value is 0 to 7 MSB OPEN Rese...

Страница 94: ...ist Format set by FORMat TALK setting Value is 1 to 6 PORTn Queries the value of byte n Format set by FORMat TALK setting Value of n is 1 to 6 POLarity 255 Sets input byte logic true polarity for the...

Страница 95: ...r SOURce data to the external device STATus Starts Status Reporting Structure OPERational Identifies Operational registers QUEStionable Identifies Questionable registers EVENt Returns contents of the...

Страница 96: ...r IDN message String is up to 72 charactersandconsistsoffourfields manu facturer model code serial number and firmware revision separated by commas e g ICS Electronics 4863 S N 012345 Rev 0 6 05 19 06...

Страница 97: ...s Their parameter form is the same as that of the SCPI commands A space isrequiredbetweenthecommandandtheparameter Shortformcommands ending with a lower case n are really six commands one for each byt...

Страница 98: ...rt as an input or as an output The SENSe and SOURce branches have a POLarity command that sets each bit s logically true state The following commands set bits on the Digital I O connector SOURCe DATA...

Страница 99: ...start review Section 2 10 to learn how the 4863 is connected to the example device MSD MSD 1 MSD 2 MSD 3 Byte4 Byte1 Logic Signals Byte Input h0E Byte6 LEDS and Control Signals Byte Output 25 Polarit...

Страница 100: ...tput to hold the DPM Note that the above commands use the values recorded in Table 2 10 when the example cable was designed The 4863 uses the DPM s polarity output signal to generate plus and minus si...

Страница 101: ...i 1 23 254 HEXL 01 17 FE HEX 0117FE 4833 0117 The output string can be sent using the SOURce DATA command using a single primary address The output string can also be sent as a transparent string usin...

Страница 102: ...nd if the 4863 is set for a single primary address or if the lower primary or secondary address is used If dual addresses are used the output data string can be sent to the upper primary or secondary...

Страница 103: ...nfiguration commands Individual input bytes are configured and read with the SCPI SENSE subsystem The PORTn command automatically sets the byte for inputtingdatawhenitisread The POLaritycommandconfigu...

Страница 104: ...e BSTATus 0 selects low true input 3 8 2 8 Reading the Digital Input String Now that the talk string has been defined and digital interface has been configured itistimetoinputdata Besurethattheexterna...

Страница 105: ...is enabled If ESR bit 6 is set the data is ready to be read If the bit is not set the EDR input line was not pulsed e g ESR Queries register status ENTER dev A Reads 4863 response AND A h40 Tests bit...

Страница 106: ...thecauseoftheSRQ Thefollowing example generates an SRQ whenever the EDR flip flop becomes set external data is ready or the Status A signal goes low In the example of 2 10 the external device has lost...

Страница 107: ...utput ports FORM LIST BIN SYST COMM GPIB ADDR MODE DUAL enables two primary addresses Sending 8 data bytes to the upper primary address 23102301 data ends with EOI on last byte 3 8 3 4 Locking the Set...

Страница 108: ...urrent date Use either the CAL DATe or SAV 0 command to save the IDN message 3 8 3 6 Saving the Configuration The4863usesthe488 2 SAV0commandtosavethecurrentconfiguration in the 4863 s Flash or the 48...

Страница 109: ...provides echos and prompts on its RS 232 interface The 2363 defaults to echo on at power turn on for keyboard operation The echo function can be disabled for computer operation by sending the unit a...

Страница 110: ...3 Rev 1 1 CR LF CR LF 3 9 3 Program operation examples Send CNTL F before any serial commands to turn echo off CNTL F turns echo off e g Program command echo off ESE 255 LF LF e g Program IDN query ec...

Страница 111: ...llresponsesarethesameasfornormal RS 232 and RS 485 operation The Address command message format is STX Addr Message LF e g The IDN query example becomes STX 4 IDN LF ICS Electronics 2363 S N 910123 Re...

Страница 112: ...essage was not a query The command acknowledgment packet contains the ESR register value e g ACK Addr ESR Register Value ETX Checksum ACK Addr Optional query response ETX Checksum A NAK packet with th...

Страница 113: ...it the command If the command is a query and contains a the Auto Query function will read the Receive Buffer and display its contents in the Device Response window The Network Protocol and Device Addr...

Страница 114: ...g contains a the Auto Query function will read and display a the serial device s response 3 9 8 Programming Suggestions For Windows 98 NT 2K or XP programming use a late version of Visual Basic revisi...

Страница 115: ...ns 4 Using the 488 2 Status Reporting Structure Define what the digital inputs mean if they are part of the system The SCPI Standard requires that the SCPI command tree and SCPI conformance informatio...

Страница 116: ...microprocessor to accept GPIB command and data characters When the command terminator is sensed the command characters are parsed and used to charge the 4863 s operational settings or invoke some acti...

Страница 117: ...tch Latch Latch Latch FIGURE 4 1 4863 BLOCK DIAGRAM The Flash memory also contains all of the 4863 s configuration settings serial number and other parameters that are subject to change At power on ti...

Страница 118: ...des the 8 Vdc necessary to drive the RS 232 line The RS 485 transceiver provides the differential transmitter andreceiverfunctionsfortheRS 422orRS 485differentialsignalpair The remainder of the 2363 s...

Страница 119: ...4 4 4 Microprocessor Address DCDR Power Supply 12 24 VDC 5V GPIB CTLR RAM P BUS EEPROM GPIB EPROM Digital Inputs and Outputs Latch Latch Latch Latch RS 232 or RS 485 FIGURE 4 2 OEM BOARD BLOCK DIAGRAM...

Страница 120: ...ignals into the logic 1 or mark state and avoid receiver errors When the serial interfaces are installed they are activated at power turn on and remain active until the unit is addressed on the GPIB i...

Страница 121: ...4 6 4 This page left intentionally blank...

Страница 122: ...plication where the IEEE 488 bus cables are frequently changed or if the input signals appear erratic the 4863 s connectors may require cleaning to remove wax and dirt buildup New GPIB bus and other b...

Страница 123: ...4863 Faults and solutions apply to the 2363 also unless otherwise noted 5 3 2 Operating Failures Use the fault isolation information in Table 5 2 to narrow the problem down to a specific area The maj...

Страница 124: ...replace PLD U8 in 4863 or in 2363 RDY Flash 4863 Flash failed write test Replace Flash U9 and reprogram configuration See DEFAULT command TALK Flash 4863 Flash loose in its socket or has a bent pin Ch...

Страница 125: ...30 Setting Check and or correct address setting SRQ GPIB Wrong firmware or GPIB chip for hardware configuration Check hardware configuration ERR and change firmware or replace GPIB Controller chip U4...

Страница 126: ...Open GPIB chip selection line After hung or grounded interrupt into Z180 blinking address ERR Cal Date Flash data reset and all calibration settings When reset lost Reset defaults reconfigure the uni...

Страница 127: ...e CAL DATE command to accept default configuration and clear the error so the ERR LED will not come on at next power on time Reload your configuration and use the SAV 0 command to save the new configu...

Страница 128: ...strings to see if any dataoutputted EDR missing with Talk handshake enabled Dual Address Mode Talk address not recognized No talk data unless unit is UNTALKed between messages in Dual Address Mode Se...

Страница 129: ...table when the procedure is completed Turn power off and again disconnect the power supply cable All configuration parameters have now been restored to the settings listed in Table 1 4 or 1 5 5 Remove...

Страница 130: ...be resolved over the phone as opposed to returning a unit for repair 2 Writeadescriptionoftheproblemandattachittothematerialbeing returned Describe the installation system failure symptoms and how it...

Страница 131: ...5 10 5 This page left intentionally blank...

Страница 132: ...erial Data Communications Background A 17 A2 1 Introduction to Serial Communication A 27 A2 2 RS 232 Standard A 22 A2 3 RS 422 and RS 485 Standards A 24 A2 4 RS 530 Pinouts A 25 A2 5 Serial Interface...

Страница 133: ...and windows DDL make the 488 PC2 operate as a 488 2 compatible controller The controller protocols are built in to the PC2 drivers All IEEE 488 2 common commands queries and SCPI commands are placed...

Страница 134: ...dress devices to talk or listen and command specific actions within devices A talker sends device dependent messages i e data status A listener accepts interface messages bus commands and device depen...

Страница 135: ...l Devices that are SCPI 1991 compatible can have their bus address set by a GPIB SYSTEM configuration command Information is transmitted on the data lines under sequential control of the three handsha...

Страница 136: ...the system or leaving characters that will be output when the device is addressed as a talker again IFC interface clear is sent by the system controller and places the interface system in a known qui...

Страница 137: ...Enable ADDRESSED COMMAND GROUP UNIVERSAL COMMAND GROUP LISTEN ADDRESS GROUP TALK ADDRESS GROUP SECONDARY COMMAND GROUP PRIMARY COMMAND GROUP PCG LSD MSD MSG GTL SDC PPC GET TCT ASCII DLE DC1 DC2 DC3...

Страница 138: ...II data characters have the same code values as bus commands but are transmitted with ATN off The following chart lists the standard command and address mnemonics Address Commands MLA My listen addres...

Страница 139: ...the logic true level Cable connectors are modified Amphenol 24 pin Blue ribbon style connectors 57 30240 with metric jack screws Figure A 2 GPIB Signal Pin Assignments 1 2 3 4 5 6 7 8 9 10 11 12 13 1...

Страница 140: ...a RESPONSE MESSAGE Asterisk defines a 488 2 common command Ends a query where a reply is expected A1 2 2 IEEE 488 2 Reporting Structure With IEEE 488 2 status reporting was enhanced from the simple se...

Страница 141: ...Operation Complete Standard Event Status Register ESR 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Logical OR Standard Event Status Enable Register ESE NRf ESE Queue Not Empty 7 5 4 3 2 1 0 Logical OR 7 6 3 2 1 0...

Страница 142: ...ue Command Devices that support parallel polls must support the following three commands IST Individual Status Query PRE Parallel Poll Register Enable Command PRE Parallel Poll Register Enable Query D...

Страница 143: ...a serial poll The RQS bit is reset by the serial poll The same 488 2 device outputs the Status Byte Register contents plus the MSS bit in response to a STB query The MSS bit is cleared when the condit...

Страница 144: ...op of the hardware independent portion of the IEEE 488 2 and operates with any language or graphic instrument program generators The obvious benefits of SCPI for the ATE programmer is in reducing the...

Страница 145: ...showssomesingleSCPIcommandsforsetting up and querying a serial interface SYSTem COMMunicate SERial BAUD 9600 nl Sets the baud rate to 9600 baud SYST COMM SER BAUD nl Queries the current baud setting S...

Страница 146: ...fourth itemXONmeansthatXONisactive Thelastitemis32 ESRregister bit 5 which means execution error caused by the BIT 6 command A1 3 3 Variables and Channel Lists SCPI variables are separated by a space...

Страница 147: ...ists random values Figure A 6 Channel List Examples A1 3 4 Error Reporting SCPI provides a means of reporting errors by responses to the SYST ERR query If the SCPI error queue is empty the unit respon...

Страница 148: ...al data speed is referred to as Baud Rate A baud is defined as a signaling bit which includes data bits as well as start stop framing parity or any other bits that make up the data format Typical comp...

Страница 149: ...ually contains 5 to 8 bits and is transmitted least significant bit first Today most of the computers and terminals use the 7 bit ASCII code to represent numbers and characters Figure A 7 shows how th...

Страница 150: ...e phone company s direct dial network DDN as shown in Figure A 8 Modems are used to convert the serial data bits into tones that will pass through the telephone system s 300 to 3000 Hz voice band For...

Страница 151: ...hemorecommon control signal pairs are Request to send Clear to send Data terminal ready Data set ready All signals must be high to enable data transmission Dropping any line normally means the receivi...

Страница 152: ...it data characters with no parity and single start and stop bits The 2303 will also work with 7 bit data characters The unused data bits are outputted on the 488 Bus as fixed zeros The user can also a...

Страница 153: ...eir functions Therelationshipofinterchangecircuitstostandardinterface types Thespecificationdoesnotmeanthattwodevicesthatare RS 232 compatible can be connected together with a standard cable and be ex...

Страница 154: ...a DTE are a PC computer or a terminal DTE devices can be mated to DTE devices byaspecial null modem cablethatcrossesthetransmitsignalsofone device with the receive signals on the other device In Europ...

Страница 155: ...connecting cable are 2 to 6V or 2 to 6V Receivers are specified to have a 0 2V sensitivity 4Kohm minimum input impedance and be capable of withstanding a maximum input of 10V Cable terminators and tra...

Страница 156: ...itsserialinterface The2303isdesignedsothatitmayreceiveeithersingleendedRS 232 or differential RS 422 RS 485 signals A2 5 SERIAL INTERFACE PROBLEMS Most of the problems that arise when connecting seria...

Страница 157: ...A2 4 Same character formats It may be obvious but often the character formats and parity settings are incorrect A typical parity setting symptom is half good half bad characters i e 1 2 4 good 3 and 5...

Страница 158: ...s the Address Switch in line with the IEEE 488 connector as shown in Figure A 9 a The Vertical Connector Switch Board Assembly has the Address Switch located on top of the IEEE 488 connector as shown...

Страница 159: ...l Connector Assembly b Vertical Connector Switch Assembly A3 2 BOARD INSTALLATION Both the Horizontal and the Vertical Connector Switch Board Assemblies are designed to be mounted to the rear panel of...

Страница 160: ...studs and two thin lock washers to hold the assembly to the panel 5 Route the flat ribbon cable to the 4803 so it avoids any high RFI or electrical noise area Plug the cable into J2 6 Mark or silkscre...

Страница 161: ...80 dia 2 plcs 4 Allow 0 25 inches for cable bend 1 750 0 920 0 350 1 578 1 842 0 350 0 700 1 775 0 420 0 635 Notes 1 All dimensions are in inches 2 D cutout radius is 0 2 inches 3 Holes are 0 180 dia...

Страница 162: ...1 18 J2 Signal Pin Table 2 20 Jumpers 2 21 Options 1 3 Physical specifications 1 19 Rear panel 1 19 Repair 5 1 Specifications 1 3 Theory of Operation 4 1 Timing 1 15 Troubleshooting 5 1 488 1 Capabili...

Страница 163: ...er Output 1 12 Digital I O Lines Clear output 2 28 Description 2 25 EDR timing 2 25 Input handshaking 2 25 Block diagram 4 2 4863 4 2 Description 4 1 OEM Board 4 4 Buffer 1 8 Byte Handling Commands 3...

Страница 164: ...ction Signal Assign ments 2 36 Example Digital Connections 2 35 External Reset Input 1 12 F Factory Configuration 2 2 2363 1 17 4863 1 16 Fault Isolation 5 2 Functions Programmable 1 16 G General Info...

Страница 165: ...IEEE 488 2 Common Commands CLS 3 13 ESE 3 13 ESE 3 13 ESR 3 13 IDN 3 14 OPC 3 14 OPC 3 14 PSC 3 14 PSC 3 14 RCL 3 14 RST 3 14 3 15 SAV 3 15 SRE 3 15 SRE 3 15 STB 3 15 TRG 3 15 TST 3 15 WAI 3 15 Table...

Страница 166: ...Command Tree 3 17 3 18 3 19 O OEM Copyright wavier 3 48 Documentation 3 48 OEM Board Block Diagram 4 4 Block Diagram Differences 4 5 Configuration Table 1 4 Dimensions 1 21 GPIB Address Switch Header...

Страница 167: ...42 Serial Interface Problems A 25 Serial poll 1 5 SERkybd program 3 46 Service Request Message Format 1 8 Setting Address 3 6 Shipment Verification 2 1 Short Form Commands 3 30 Signal Pin assignments...

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