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Metrolab FDI 2056 User`s Manual, version 2.0 rev

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1. Syntax TRIGger EXTernal POSitive NEGative EITHer DEFault TRIGger External DEFault OPTions mi ETRO Jala 35 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Default POSitive Arguments POSitive A transition from low to high of the trigger in signal located on the front panel is used to exit the trigger level NEGative A transition from high to low of the trigger in signal located on the front panel is used to exit the trigger level EITHer Is a conjunction of both POSitive and NEGative conditions Example ARM ENT EITH Configures the transition detector to generate an event each time a transition occurs on the external input trigger signal 3 7 45 TRIGGER SEQuence ENCoder DIRection When the trigger source is set to ENCoder this subcommand helps to specify whether the encoder direction of interest is FORward or BACKward Syntax TRIGger ENCoder FORward BACKward DEFault TRIGger ENCoder DEFault OPTions Default FORward Arguments FORward The forward definition must be set in accordance with the LED FW located on the front panel of the FDI channel BACKward The backward definition must be set in accordance with the LED BW located on the front panel of the FDI channel Example TRIG ENC BACK Configures the trigger system to react only to pulses generated when the encoder is travelling backwards 3 7 46 TRIGger SEQuence TlMer RATe Sets the
2. 2014 Metrolab Technology SA e Over range error STATUS 1 bit 4 e Overlap timeout STATUS 2 bit 0 e Measurement buffer full STATUS 2 bit 1 4 11 8 Automatic Use of a Motor MOT Al As the FDI2056 does not incorporate a motor driver this command calls an external library that can be tailored by the end user Please read the section 4 3 for more details Assuming the user has provided the adequate software layer the instrument will behave as follows Apart from the three commands MOT A MOT and MOT S which are used to start and stop the motor there is also the possibility of controlling the motor automatically during a measurement cycle Thus the motor starts when the RUN command is received and stops when the measurement cycle is completed This automated mode is entered after the reception of the MOT A command and exited at the reception of the MOT S command 4 11 9 Autotest TST and AUT Each time the FDI2056 is powered up it performs an autotest which lasts five seconds and performs five preset measurements and verifies the results During the autotest the display shows the word Test Once finished if the autotest was successful the display will show the channel to which it is assigned and the current value of the gain Should the test prove incorrect the display will show one of the following words ICAL MEM INP or RNG Message Cause K ICAL The internal compensation file is corrupt Yo
3. Disabled state the Sync signal acts as the Error input of the decoder The Error input polarity is set in bit 3 0 No index present 1 Index present 0 Differential 1 Single ended Bit O Bit 1 Bit 2 Bit 3 A when set to 0 A when set to 1 B when set to 0 B when set to 1 when set to 0 I when set to 1 E when set to 0 E when set to 1 Metrrolab 77 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Data processing reported events BAR3 0x108 Read only Bit 0 Partial integral accumulator has overflowed Bit 1 Partial timestamps accumulator has overflowed Bit 2 Float32 result has overflowed on its exponent part Bit 3 Float64 result has overflowed on its exponent part Acquisition reported events BAR3 0x109 Bit 0 Acquisition done Bit 1 ADC was reset Indicates a serious problem Bit 2 ADC sampling is too fast A sampling request was received while the current conversion operation was still in progress Bit 3 Trigger rate is too fast Your trigger rate is higher than the sampling rate Bit 4 Error detected on Bi Phase encoder the Error signal is active Its activity state depends on the configuration See register Hardware configuration Bit 5 Error detected on Bi Phase decoder edge count incorrect at index Writing a value again in the Bi Phase decoder maximum count register will reset this bit Bit 6 Positiv
4. This bit indicates that the motor has been activated in the positive direction corresponds to FW if the cabling is correct see the MOT command for more details This bit is set or cleared even if the software motor interface is unused see chapter 4 3 for more details Motor This bit indicates that the motor has been activated in the negative direction corresponds to BW if the cabling is correct see the MOT command for more details This bit is set or cleared even if the software motor interface is unused see section 4 3 for more details MetrrRolab o wwumenolabaom FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Table 4 3 STATUS 3 Trigger source STATUS A Integrator Channel 1 Byte Access to integrator channel status for channel C to are accessed using the CHA command Channel B Bit 7 6 Channel D Channel F Channel H ps Bit 5 Bit 4 Channel A Bit 3 22 Channel C Channel E Channel G Channel I K Bit 1 Metrrolab VFC Type These bits show if the channel is active The reported Voltage To Frequency type depends on the value set during the configuration Please read section 4 2 00 Channel B is inactive 01 VFC 100 kHz 10 VFC 500 kHz 11 VFC 1 MHz Negative over range This bit reports the instantaneous negative over range status When the negative over range LED on the bargraph display of the channel is lit this bit is set Positi
5. ERRor signals are omitted the configuration will consider these signals as absent and will behave accordingly Third field ROTational LINear lt numerical value gt Specifies if a LINear or a ROTational encoder is used The numerical value specifies the number of lines found on the encoder Please note that a 1024 lines encoder will internally be interpreted as a 4096 pulses encoder Example CONTR ENC CONF DIFF A B IND ROT 256 mi ETR olab 21 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA This will configure the system to decode the signal fed from the encoder connector using a differential to single ended circuitry Once this adaptation is made the A signal is used directly the B signal is inverted before use The encoder provides an index signal which is used directly No error signal is present in the system The encoder is rotational and will generate 256 pulses per turn It is to be noted that using a differential system physically permuting a pair of signal or setting the same pair to be inverted by software is the same operation Notes When the decoder is configured to use an index the first time the index is reached the internal counter keeping track of the current position will be set to 4 lt numerical value gt 1 or 0 depending on the rotational direction The value of this counter is available by using the command CONTR ENC POS When configuri
6. FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA The trigger IN is a 3 3V 5V tolerant TTL input The software selected edge of the Trigger IN signal determines when partial integrals are computed Each trigger pulse ends the previous partial integral if there was one and starts a new one Thus a sequence of N partial integrals requires N 1 trigger pulses The rise times should be as fast as possible to minimize timing jitter The trigger OUT signal allows you to monitor the activity of the trigger signal being used internally Please observe that the actual timing used in the system is not identical to the one that can be observed on this output Using this signal to daisy chain all boards together would result in measurements being very poorly synchronized The system provides an internal channel synchronization designed for that purpose The FDI2056 front panel connectors are NOT protected against over voltages or electrostatic discharge Please be very careful and verify your signal levels on an oscilloscope when making your connections 2 2 1 Description of the encoder input Micro D connector The FDI2056 is supplied with a 50 cm cable with a Micro D connector The color in the table below refers to this cable Pin n Cable color Function 1 Black B 2 Brown B 3 Red A 4 Orange A 5 Yellow 5 Volts or 3 3 Volts Factory default 5 Volts A re armable
7. MINimum Sets the input gain to its minimal value MAXimum Sets the input gain to its maximal value UP Increases the gain using the next valid value DOWN Decreases the gain using the next valid value value Valid values are 0 1 0 2 0 5 1 0 2 0 4 0 5 0 10 0 20 0 40 0 50 0 100 0 Any other value will generate an error Example INP GAIN 10 Sets the gain of all channels to 10 3 7 20 MEASure SCALar VOL Tage Query only Instantly measures a single non averaged voltage value Syntax MEASure SCALar VOLTage lt digits gt Default digits 6 Arguments digits The number of digits that must be returned to the user Example MEAS VOLT 3 This command might return 0 123 V n Related commands FORMat DATa FORMat READings ALL FORMat UNIT ENAB1e UNIT VOLTage m ETR olab 27 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA 3 7 21 MEMory STORe STATe Event Store the current user s settings in local hard drive Syntax MEMory STORe STATe Example MEM STOR Store the current system state into the local hard drive Related commands MEMory DELete RST SYSTem PRESet 3 7 22 MEMory DELete Event Deletes the current user s settings from local hard drive Syntax MEMory STORe STATe Example MEM DEL Delete all user s settings keeping only factory defaults Related commands MEMory STORe STATe RST SYSTem PRESet 3 7 23 READ ARRay
8. channel by adjusting the voltage offset at the input The voltage offset depends greatly on the gain value Therefore as a best practice recommendation the offset adjustment should be requested each time a new gain is set This adjustment is made each time the ADJ command is sent The ADJ command can be sent to any channels in the system at the same time lts up to the user to decide whether the input will be short circuited by the internally provided circuit or by using an external circuit Should you decide to use the internal short circuitry the ISC command will help you to do so 4 8 INTEGRATOR MODE The Integrator Timer mode TRS T which is the default mode at power on is generally used with fixed coil configurations to analyze time dependent flux variations The Integrator Displacement or Encoder mode TRS E is used with moving coil configurations to analyze space dependent flux variations In these modes every channel can be selected or deselected individually by using the CHA command The trigger source must be selected by the TRS trigger source command if the default value TRS T is not desired Finally a TRI sequence must be programmed defining a sequence of integration intervals After the execution of the TRI command the RUN command starts the measuring sequence The TRI sequence is memorized and can be repeated as many times as required by the RUN command If needed the parameters of the current TRI se
9. events This section follows these conventions No query form exists for commands identified as Set only mi ETR olob 16 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA A question mark appended to the command and Query only indicates query only commands Acommand generating an internal event is identified as Event All commands are listed in alphabetic order excluding IEEE 488 2 commands starting with an asterisk which are described in section 3 5 and excluding STATus command which are described in section 3 3 3 7 1 ABORT Event Stops the execution of a command Syntax ABORT Example ABORT 3 7 2 ARM SEQuence LAYER SOURce Selects the source for the arm event detector Only one source may be specified at a time Syntax ARM SOURCe IMMediate SYNChro ENCoder EXTernal INTernal TIMer BUS ARM SOURCce DEFault OPTions Default IMMediate Arguments IMMediate Specifies an immediate exit of the arm state SYNChro ENCoder EXTernal Specifies that the arm source is fed by the synchronization signal found on the encoder connector The slope to be used is configured using the command ARM SEQuence LAYER SYNChro POLarity Specifies that the arm source is fed by the signal extracted from the encoder The configuration of this extraction is made using the command CONTRo1 ENCoder CONFigure Specifi
10. response ready to be read 5 ESB Event Summary Bit 6 RQS ReQuest for Service m ETR olab 10 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA Bit Name Description 7 OSB Operation Summary Bit 3 3 2 Standard Event Status Register Memorizes certain standardized events The FDI2056 uses the following bits Bit Name Description 0 Operation Complete OPC has flagged operation complete 2 Query Error Error in preceding query 3 Device Dependent Error Errors specific to the FDI2056 including internal errors 4 Execution Error Error detected during command execution 5 Command Error Error in preceding command 6 User Request A parameter has been changed T Power On FDI2056 has been powered up 3 3 3 QUEStionable Status Indicates conditions that may reduce the quality of the measurement The FDI2056 sets the following bits Bit Name Description 0 Voltage The input voltage generated an over range 8 Calibration The recommended calibration period has been exceeded 9 Trigger Trigger signal is too fast 10 Integration A calculation overflow occurred in the integration subsystem 11 Encoder The pulse count at the index is not correct 3 3 4 OPERation Status Captures conditions which are part of the instrument s normal operation The FDI2056 uses the following bits Bit Name Description 4 MEASuring Measuring voltage or flux 5 Waiting for TRIGger Waiting for trigge
11. 1 0 2 04 0 5 je 4 5 10 20 40 50 100 z Gain_5 Numeric O 1 2 O44 OF 1 2 4 5 10 20 40 50 100 Gain_10 Numeric 0 1 0 2 0 4 0 5 1 2 4 5 10 20 40 50 100 E Gain_20 Numeric Ol 02 O 0S l A 4 5 10 20 40 50 100 Z Gain_50 Numeric 0 1 0 2 0 4 0 5 1 2 4 5 10 20 40 50 100 Z Gain 100 Numeric Ol O24 O44 0S 1 2 4 5 10 20 40 50 100 Gain_200 Numeric 0 1 0 2 0 4 0 5 1 2 4 5 10 20 40 50 100 Gain_500 Numeric Ol 02 04 O50 ik A 4 5 10 20 40 50 100 Gain_ 1000 Numeric 0 1 0 2 0 4 0 5 1 2 4 5 10 20 40 50 100 E InternalTimeTriggerRate Numeric Default 1000 Up to 500 000 Internal time trigger rate expressed in Hertz The PDI default value is 1000 Hz When changing this parameter you must not exceed the sampling rate of the system SamplingRate Numeric Default 100 000 Up to 500 000 Sampling rate used by the analog front end E VFCType VFC Inactive enumeration 100kHz 500kHz 1MHz This value is only provided as a means to fill the status register 4 It is not used otherwise 7 Communication Baudrate Numeric 75 29 bat emt 20101 600 1200 1800 2400 4800 7200 9600 14400 19200 28800 me TROlab 42 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA 38400 57000 57600 115200 128000 230400 Z ByteSize Numeric 7
12. 8 E FlowControl Flow control none enumeration xonxoff ctsrts Parity Parity no enumeration odd even mark Z Port Port name COM1 to last system COM This value must be set carefully if the port doesn t exist the PDI emulator application will exit and reboot the system resulting in an endless startup reboot loop E StopBit Stop bit 1 0 values 1 5 2 0 QuadratureSignalConfiguration m HasIndex Boolean true false When set to true indicates to the system that the encoder connected to the system provides an Index signal This information is used to define the way the decoder will behave when an index search is performed With index the decoder waits until the index is found and sets its internal counter to zero Without index the decoder is set to zero immediately after the reception of the IND command InvertA Boolean true false All InvertX parameters indicate whether the input signal is used in its direct form or in its inverted version This way the direction detected by the bi phase decoder can be configured The configured version of the signals A B and Index are then directly used to create a 90 index which must be positive InvertB Boolean true false InvertError Boolean true Metrrolab 43 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA m false InvertIndex Boole
13. 80 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA NOTICE me TROlab 81 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA gt PXI cards use a locking card extractor When inserting the card Push the levers outward Push the card in until the black plastic extractor levers touch the crate and Push the levers inward until you hear both locks click When removing a card Press the red lock levers with your thumbs Push the black extractor levers outward to extract the card and Gently pull the card out of the slot See Caution note above To provide additional assurance that the card does not vibrate loose for example when shipping you can tighten the screws behind the extractor lever me T ROLD 82 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA 5 5 WARRANTY CALIBRATION CERTIFICATION AND MAINTENANCE Warranty 2 years Recommended calibration interval 12 months Maintenance None NOTICE This product conforms to the WEEE Directive of the European Union 2002 96 EC and belongs to Category 9 Monitoring and Control Instruments For proper environment friendly disposal you can return the instrument free of charge to us or our local distributor mi ETR olob 83 www metrolab com
14. CHA1 SER This command might return 2056915 An 3 7 35 SYSTem FWVERsion Query only Returns the firmware version of the instrument The returned value is the same as the fourth parameter returned by the IDN command Syntax SYSTem FWVERSion Example SYST FWVER This command might return 1 0 2 n 3 7 36 SYSTem LANGuage Select the command set used by the instrument Syntax SYSTem LANGuage SCPI PDI5025 SYSTem LANGuage DEFault OPTions Arguments SCPI No effect m ETR olab 32 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA PDI5025 The language switch is made immediately leading to an instant loss of communication as the PDI5025 idiom is carried through a serial communication port Example SYST LANG This command will return SCPI n 3 7 37 SYSTem SERial Query only Returns the serial number of the instrument The returned value is the same as the third parameter returned by the IDN command Syntax SYSTem SERial Example SYST SERial This command might return 2056 0001 n 3 7 38 SYSTem POWER Shuts the system down This is the best way to turn the system off Syntax SYSTem POWer ON OFF SYSTem POWer DEFault OPTions Arguments ON No effect OFF Properly shuts the system down Example SYST POW OFF Shuts the system down 3 7 39 SYSTem PRESet Event Reinitializes the system using user s settings Syntax SYSTem PR
15. HELP HEADers Query only Returns all commands known by the system Syntax SYSTem HELP HEADers Example SYST HELP HEAD Lists all available commands 3 7 30 SYSTem HELP SYNTax Query only Returns the syntax of the specified command Syntax SYSTem HELP SYNTax lt command_header gt Example SYST HELP SYNT INP The above command returns INPut COUPling GND DC n INPut COUPling OPTions DEFault n INPut GAIN MINimum MAXimum UP DOWN DEFault lt value gt n INPut GAIN OPTions DEFault n 3 7 31 SYSTem CHAnnel CDATe Query only Returns the calibration date of the specified channel Syntax SYSTem CHAnne1 CDATe Example SYST CHA1 CDAT This command might return Tue Jan 22 14 03 45 2013 n 3 7 32 SYSTem CHAnnel MDA Te Query only Returns the manufacturing date of the specified channel Syntax SYSTem CHAnne1 MDATe Example SYST CHA1 MDAT This command might return mi ETR olab 31 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Thu Jan 01 13 53 19 2009 n 3 7 33 SYSTem CHAnnel HWVERsion Query only Returns the hardware version of the specified channel Syntax SYSTem CHAnne1l HWVERSion Example SYST CHA1 HWVERsion This command might return CORE v1 3 PXI DISPLAY v1 MEMORY vi On 3 7 34 SYSTem CHAnnel SERial Query only Returns the serial number of the specified channel Syntax SYSTem CHAnne1 SERial Example SYST
16. Motor control Available Unavailable Gain selection 0 1 0 2 0 4 0 5 E SC i 10 20 50 e E 100 200 500 1000 Timestamp Unavailable Available Acquisition buffer Limited to 5200 Limited to 512k measures measures Front panel FNC and Gain buttons Available Unavailable Channels lat 1 up to 9 Autonomous Talker only mode Available Unavailable 1 Although a physical driver motor is not present in the system a software layer is made available to help you to start and stop the motor with the same set of commands that were provided on the PDI 5025 Please read section 4 3 Using an extended command IMD 2 This is the lower limit If the data are read at a sufficient speed there is no limitation 4 The FNC and Gain buttons were used on the PDI 5025 to Change the gain Set the unit in offset compensation mode m ETR oloabl 40 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Send a software trigger Start a measurement During the following explanations the red flag symbol signifies a change between the PDI 5025 original behavior and the new emulation one 4 2 CONFIGURATION Before using the FDI2056 in its PDI 5025 emulation mode some parameters must be set according to the user s specific hardware interface and bi phase encoder All parameters are located in the FDI2056 operating system registry On 32 bit systems the root key is HKLM Software Metrolab
17. Query only Read data values Equivalent to the sequence ABORTt INIT FETCh ARR Syntax READ ARRay lt size gt lt digits gt Default digits 6 Arguments size The amount of data being read into the system digits The number of digits that must be returned to the user Example READ ARR 555 6 Read 555 values each having 6 digits Related commands mi ETR olab 28 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA FORMat DATa FORMat TIMestamp ENABle FORMat READings ALL FORMat UNIT ENAB1le UNIT FLUX UNIT VOLTage UNIT TIMestamp 3 7 24 SENSe CORRection ALL AC Quire Event Proceeds to an offset and slope correction over all available gain on a channel When proceeding to the offset correction the input is not short circuited It s up to the user to proceed to that operation if needed Syntax SENSe CORRection ALL ACQuire Example SENS CORR ALL Automatically proceeds to an offset and slope correction over all available gain Related commands INPut COUPling SENSe CORRection MEMorized 3 7 25 SENSe CORRection ZERo AC Quire Event Proceeds to an offset correction on a channel When proceeding to the offset correction the input is not short circuited It s up to the user to proceed to that operation if needed Syntax SENSe CORRection ZERo ACQuire Example SENS CORR ZER Starts the offset correction Related co
18. TECHNICAL SPECIFICATIONS DIGITIZER Gain 0 1 0 2 0 4 0 5 1 0 2 4 5 10 20 40 50 100 Dynamic range 10 Gain Max common mode voltage Max input bandwidth Noise floor 1 kHz bandwidth Noise Floor dB Input impedance Digitizer resolution Max sample rate Nonlinearity Single Tone Nonlinearity Dual Tone INTEGRATOR Timer resolution 12 5 ns Time base stability over temperature 0 075 0 to 60 C Time base stability over time lt 5x 10 30 5 0 7 1 year Drift 105 FS min 1 Drift variation typical lt Noise Floor 5 Vs s COMMON Trigger sources External timer encoder software multichannel Trigger rate 0 02 to 500k Encoder input Voltage 3 30r5 Current protection 750 Hold 1500 Trip mA Signal type Single ended or differential Index type None or 90 270 Memory capacity 1M PI 2 me TROlab 72 www metrolab com FDI2056 User s Manual SYSTEM v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Industrial computer Intel x86 architecture Windows OS 16 GB RAM 32 GB Flash drive Ethernet USB 2 0 3 Number of channels 1 3 Ethernet interface VXI 11 IEEE 488 2 SCPI compliant Max transfer rate Ethernet 1000 3 PI s 2 RS 232 Interface PDI5025 compatibility mode Power requirements 100 240 V 50 60 Hz 80 A inrush current max Operating temperature 0 40 C Size
19. and weight Mounting Horizontal or vertical optional rack mount kit Recommended calibration interval 445 x 130 x 245 mm 19 x 3U 7 2 kg max 12 months 5 2 1 FS Full Scale 2 Pl Partial Integral including timestamp 3 Subject to change contact Metrolab for exact specifications INTEGRATOR CHANNEL REGISTERS DESCRIPTION Memory mapping unless mentioned all registers are readable writable Offset BAR2 0x000 BAR3 0x100 0x104 0x108 0x10C 0x110 0x114 0x118 0x120 0x124 0x128 0x12C 0x130 0x134 Metrrolab 0x0 0x1 0x2 0x3 Read Data Write Trigger configuration FIFO Status Mode Interrupt Interrupt enable pending Gain Signal path Trigger input Bi Phase configuration configuration configuration decoder amp configuration Voltage reference selection Data processing Data acquisition FIFO status reported events reported events PXI Star Trigger configuration and enabling system Bi Phase decoder current position Edge count Bi Phase decoder maximum count 1 Edge count Bi Phase decoder target count Edge count Sampling Rate Period Integrator mode only Time Trigger Rate Period Gain Factor Double precision IEEE 754 floating point 64 bits Offset Signed integer 32 bits JTAG Configuration 73 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA 0x13C Version Revision Frequency Frequency
20. ege eet nade edn ein ea eel eta Oh eee eit Beet iad 46 4 8 Integrator Mode asch Ze date nein Aint aie devise EEN Rist a eins dn ae eee 46 4 9 Programming The Integration Intervals AAA 46 4 9 1 Trigger SOUTCO NEE 47 4 9 2 Trigger Source Bi Phase Encoder enne 48 4 9 3 Trigger Source E TEE 49 4 10 The PDI 5025 Status Heogeters AAA 51 4 11 Data ACQUISITION EE 58 4 11 1 Individual data storage CUMO 58 4 11 2 Cumulative data storage CUDM TE 58 4 11 3 Last cumulative data storage CUMTIL 58 4 11 4 Direct Data Transfer IMD 1 2 c cccccecscececerseecevensenensaneesnneneneeseesenessaaeesenenenesuansenesenaeeneseneatenenes 59 4 11 5 Block Data Transfer IMD O isining a E E ees 59 4 11 6 End RETTEN 60 4 11 7 Interrupting a measurement cycle DP 60 4 11 8 Automatic Use of a Motor MOT Al 61 4 11 9 Autotest TSTand AUT perenensis i aa EE a E Eia a TE 61 4 11 10 Offset compensation ISC ADJ ecccccscccesceceneceneeceneeeseaeeseeeesaeesaaeeseaeesaaeesaeseaeeseaeesaeeseaeennates 62 4 11 11 Synchronization by the Host Computer GN 62 4 12 PDI 5025 Emulated COMMANDES nenna 63 REFERENCE eer 72 5 Technical Details ousgeuugesrgenugegrgegu uniunea nnan ntti 72 5 1 Digitizer performances aea aaea E aa Ea NEE a Erreur Signet non d fini 5 2 Integrator channel registers description ec eeeseeeeeeneeeeteneeeeeeeneeeeesaeeeeeeneeeeeeeaeeetesaneeesenaeeeeteeeereeaes 73 953 np t adaptation EE 79 mMm ETR olab iv www
21. frequency of an internal periodic signal source Its value affects the trigger system only when it is selected as the SOURce for the event detector Syntax TRIGger TIMer RATe lt value HZ gt DEFault TRiGger TIMer RATe DEFAult Default 100 kHz Example TRIG TIM 1KHZ mi ETRO Jala 36 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Sets the internal periodic signal source to generate a pulse every 1 ms 3 8 PROGRAMMING HINTS Note that National Instruments Measurement amp Automation Explorer part of the LabVIEW package provides a very useful tool to explore the command set Under System Peripherals amp Interfaces VISA TCP IP Resources or USB Resources select the FDI2056 and click the Open VISA Test Panel icon This opens a window from which you can try all functions available through NI VISA Here are a few notes on how the native command set is intended to be used Use the UNIT command to set the units in which the results are returned and the digits parameter to control the number of significant figures returned assuming FORMat is ASCii Use the TRIGger SEQuence commands to control the measurement timing As trigger source you can select an internal timer a trigger command sent from an encoder or an external Trigger In signal After setting up the trigger source you initiate a measurement using the INITiate command Use th
22. having to wire all integrator channels with your trigger source See section 4 2 for more details regarding this option Following the reception of the RUN command each trigger signal defines the start of a new integration period The measurement sequence is terminated by the BRK command after which the external trigger signals are ignored The bit End of Run of STATUS 1 bit 3 is then set During a measurement cycle the external trigger can be disabled by sending the command FPT 0 To re enable the external trigger the command FPT 1 must be executed Note The FPT command does not terminate the measurement that is in progress as does the BRK command A measurement sequence can be initiated by an external synchronization signal To select this mode use TRS X S This works in the manner described above except that the trigger signals are disabled until the first external synchronization pulse occurs after the RUN command Any following external SYNC signals are ignored The external synchronization shares the same pin as the ERROR signal found on the bi phase trigger input connector mi ETRO Joly 50 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA 4 10 THE PDI 5025 STATUS REGISTERS The PDI 5025 has seven internal status registers that can be accessed by the user These registers can be used to interrogate the instrument about its current state Each status register contains eig
23. is 123 15 means a number having 1 digit That number is 5 123 means a number having 1 digit That number is 2 the 3 which follows is part of the data Encoded data are 32 bit little endian floating point values When timestamps are enabled data are formatted by pairs constituted by a timestamp followed by a measured value If timestamps are disabled all data are measured values Enabling or disabling the timestamp is controlled by the command FORMat TIMestamp ENABle Related commands FETCh ARRay READ MEAS VOLT FORMat TIMestamp ENAB1le mi ETR olab 24 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA SENSe FUNCtion 3 7 15 FORMat TIMestamp ENABle Determines if the timestamp must be sent when reading measurement results Syntax FORMat TIMestamp ENABle lt Boolean gt DEFault FORMat TIMestamp ENABle DEFault Default 1 Arguments 0 Disables the timestamp readout 1 Enables the timestamp readout 3 7 16 FORMat READings ALL Determines the behavior of the readings when using commands addressing multiple channels Syntax FORMat READings ALL lt Boolean gt DEFault FORMat READings ALL DEFault Default 1 Arguments 0 Only data coming from channel 1 will be read out A warning is sent to the user if the value is not the same on every channel 1 All values are read back each value is preceded by the string CH lt Numbe
24. metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA 5 4 Adding a supplementary integrator channel 5 5 Warranty Calibration Certification and Maintenance cccccsccceeeeseeeeeneeeeeseeeeeesneeeseneeeeessneeeessaes m E T D olab V www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA GETTING STARTED 1 Introduction The Fast Digital Integrator FDI2056 is a high precision high speed voltage integrator developed at the European Organization for Nuclear Research CERN Combined with an appropriate flux coil the FDI2056 makes an extraordinarily flexible fast and sensitive magnetometer The CERN s original objective was to perform high precision multi pole measurements of dynamic field effects in conjunction with a fast rotating coil system The FDI2056 is however a general purpose instrument capable of measuring low level and rapid flux changes in all imaginable coil configurations rotating coil moving coil flip coil moving wire static coil in an AC field etc The FDI2056 communicates to any host computer using an ethernet VXI compliant protocol by default or using a serial PDI 5025 protocol when configured as such The software interface to the instrument is provided via the NI VISA library VISA Virtual Instrument Software Architecture is an industry standard with NI VISA being an implementation from Nation
25. new command before finishing reading the response to a preceding query me T rRolob 38 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA 420 440 100 101 102 103 105 200 200 201 202 203 204 205 206 207 208 Query UNTERMINATED The host is trying to read a response without having sent a complete query Query UNTERMINATED Indicates that a query was received in the same program after indefinite response message after a query requesting an indefinite response was executed On the FDI2056 the only command returning an indefinite response Arbitrary ASCII Response Data is IDN INSTRUMENT DEPENDENT COMMAND ERRORS Invalid value in list One or more values in a numeric list parameter are invalid e g floating point when not allowed Wrong units for parameter A parameter within the command has the wrong type of units for the command Invalid number of The channel list provided refers to more layers of dimensions in channel multiplexers than allowed Numeric suffix invalid The channel number provided is not valid INSTRUMENT DEPENDENT EXECUTION ERRORS Software Error The firmware has encountered an unexpected error Data not all available The user is trying to fetch more data than was acquired Data buffer was overrun No probe plugged in Unit already exists The user is trying to register a unit which already exists in the system Unknown unit
26. 27 is reached the system will instantly process the trigger related instructions 3 7 4 ARM SEQuence LA YER S YNChro SLOPe Configures the transition detector of the synchronization signal to generate an arm condition on a specific slope Syntax ARM SYNChro POSitive NEGative EITHer NONe DEFault mi ETR olob 18 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA ARM SYNChroe DEFault OPTions Default NONe Arguments POSitive A transition from low to high of the synchronization signal found on the encoder connector is used to leave the arm level NEGative A transition from high to low of the synchronization signal found on the encoder connector is used to leave the arm level EITHer Is a conjunction of both POSitive and NEGative conditions NONe Disables the synchronization function to the benefit of the error signal that might be found on some encoders Example ARM SYNC POS Configures the transition detector to generate an event when a low to high condition occurs on the synchronization signal 3 7 5 ARM SEQuence LAYER EXTernall SLOPe Configures the transition detector of the external input trigger signal to generate an arm condition on a specific edge Syntax ARM EXTernal POSitive NEGative EITHer DEFault ARM EXTernal DEFault OPTions Default POSitive Arguments POSitive A transition from low to high of the synchronization signal found on the e
27. 3 7 30 SYSTem HELP SYNTax Query op 31 3 7 31 SYSTem CHAnnel CDATe Query onivl 31 3 7 32 SYSTem CHAnnel MDATe Query oni 31 3 7 33 SYSTem CHAnnel HWVERsion Query on 32 3 7 34 SYSTem CHAnnel SERial Query OMY ecccceccceseeeeeeeeneeeeeeeeeneeeeeceesaeesaeesaeeessaeeesetessaeenaees 32 3 7 35 SYSTem FWVERsion Query oni 32 8 7 36 SYSTEM LANGUA QO iieii rii Ea EE E RT E EEA SEE EEE EET E EEE TEE 32 3 7 37 SYSTem SERIal Query on 33 3 7 38 SYS Tem POWER eege Seefe ereechen Da Aere 33 3 7 39 SYSTem PRESet Event ain seis au as oe ann ea eal 33 3 7 40 SYSTem CHAnnel COUNt Query on 33 3 7 41 TPHiGoer t GEOuencelGCOUlfice AAA 34 3 7 42 TRiGger SEQuence COUNC A 35 3 7 43 TPiGoer t GEOuencel ECOOUN 35 3 7 44 TPHiIGGEHal GEOuenceltNvfernallGtOPel 35 3 7 45 TPHiIGGEHa GEOuencelENCodert DiHechon 36 3 7 46 TPiGoer t GEOuencel Tied HA Tel 36 3 8 Programming JIP ee i cb a ee ee reese 37 USING THE PDI EMULATION MODE visicccicccscccicccsccescccccccsccucccesccusccusccusccusccucscusceues 40 4 Software Te sais ciassccesdees rsidesensncstaccssdessncdudasaodsaeisaisiusaunduaedswessiuisontaauddes 40 4 1 Reuler TEE A0 4 2 eene le EE 41 4 3 Motor Software Merna E aane geE ee deed Raa tear ee igre 44 e o Power On RE EE 45 4 5 Channel Selection scsicctcc cideeckastied dee hegcawed po eaa AE Mee etd nigheyied ca sdeehie edi tedden reais 45 4 6 Gain Sl CON EE 45 4 7 Offset adjUStMeMts te sidbisee ae
28. 44 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA e void Release The emulator will call this procedure when it stops You may proceed in this procedure to the cleanup needed to restore the system on the same state as before the call of Initialize A complete but empty project written for and using Microsoft Visual Studio 2010 is available on the software distribution CD and in the folder C Program Files Metrolab FDI2056 Motorlnterface of the FDI2056 Once completed to fulfill your motor driver requirements the generated DLL named MotorInterface dll must be placed in the folder C Program Files Metrolab FDI2056 where the default DLL which was generated using this empty project is placed 4 4 POWER ON SEQUENCE When powered on the first operation performed by the FDI2056 is an autotest which takes several seconds Should one integrator channel fail Status bytes 5 and 6 will indicate any error conditions that raised this situation During the autotest the word TEST is displayed on the module At the end of it the display will either show a gain of 10 with the channel identification letter AT B up to I or if an error has been detected one of the following status indicators will be displayed ICAL MEM INP or IRNG Section 4 11 9 describes the corrective action that may eventually take place if such a situation arises This autotes
29. CONTrol CONTRol Quadrature signal decoder configuration DIAGnostic DIAGnostic Initiate firmware upgrade DISPlay DISPlay 4 Digit display management Metrrolab www metrolab com FDI2056 User s Manual FORMat HCOPy INPut INSTrument MEMory MMEMory OUTput PROGram ROUTe SENSe SOURce STATus SYSTem TEST TRIGger UNIT VXI v 2 0 r 1 2 05 14 FORMat INPut MEM SENSe STB SRE ESRA ESE OPC WAI STATus SYSTem ERRor RSI TST IDN CLS SYSTem VERSion SYSTem HELP TRG ARM INITiate ABORt TRIGger UNIT FLUX UNIT VOLTage UNIT TIMestamp Metrrolab Copyright 2014 Metrolab Technology SA Set output format Not used in the FDI2056 Configure gain and coupling Not used in the FDI2056 Store Delete user settings Not used in the FDI2056 Not used in the FDI2056 Not used in the FDI2056 Not used in the FDI2056 Internal correction and measurement mode Not used in the FDI2056 Read enable bits in Status Byte Read enable bits in Standard Event Status Register Detect and wait for operation to be complete Read enable bits in OPERation and QUEStionable registers Query error queue Perform reset Perform self test Return Instrument ID Clear status Return SCPI version Provide command help Not used in the FDI2056 Generate a trigger Arm Trigger signal Enable triggers Abort triggers Trigger configuration Specifi
30. ESet Example SYST PRES Reinitializes the system using users setting 3 7 40 SYSTem CHAnnel COUNt Query only Returns the number of channels available in the system mi ETRO Jala 33 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Syntax SYSTem CHAnne1 COUNT Example SYST CHA Returns the number of channels available in the system 3 7 41 TRIGger SEQuence SOURce Selects the source for the trigger event detector Only one source may be specified at a time Syntax TRIGger SEQuence SOURce IMMediate ENCoder EXTernal INTernal TIMer BUS TRIGger SEQuence SOURce DEFault OPTions Default TIMer Arguments IMMediate ENCoder EXTernal INTernal TIMer BUS Specifies an immediate exit of the trigger state No measurements can be tanken in that mode Specifies that the trigger source is fed by the signal extracted from the encoder The configuration of this extraction is made using the command CONTRo1 ENCoder CONFigure Specifies that the trigger source is fed by the trigger in signal found on the front panel The slope to be used is configured using the command TRIGger SEQuence EXTernal POLarity Specifies that the trigger source is fed internally Used only on instruments having multiple channels which need to work synchronously Specifies that the trigger source is fed by the internal periodic si
31. FDI2056 PDI5025EmulationParameters And on 64 bit systems the root key is HKLM Software Wow6432Node Metrolab FDI2056 PDI5025EmulationParameters This is because the PDI 5025 emulator application has been targeted for 32 bit systems The following tables describe all parameters their usage and specify the various values or numerical ranges All keys described are relative to the root key as previously specified All values are capital insensitive 7 Channels KE FDI2056_SLOT2 11 Up to 9 channels ChannelName Letter A B C D E F G H PDI channel name must be unique for each integrator channels DefaultGain Numeric 1 2 5 10 20 50 100 200 500 1000 Default PDI gain set at startup ExternalTriggerEdge Edge disabled enumeration rising falling both External trigger input configuration This input is located on the front panel of each integrator channel Gain_1 Numeric 0i 02 04 05 1 2 4 5 10 20 40 50 100 Substitution values for each PDI analog input gain to map FDI gain values Especially useful for PDI gain greater than 100 and FDI gain lower than 1 When the RGA command is issued the returned gain value is the one given during the SGA m ETR olab 41 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA command not the substituted value Z Gain_2 Numeric 0
32. HE FDI2056 3 VXI amp SCPI standard interfaces 3 1 HOST INTERFACE The FDI2056 and its associated host software support an Ethernet interface The native host interface protocol is based on the following standards very widespread in the instrumentation industry VXI 11 Ethernet device control SCPI command structure The native commands provide access to all the features of the FDI2056 3 2 SCPI INSTRUMENT MODEL The FDI2056 complies with the Standard Commands for the Programmable Instruments SCPI standard SCPI uses a standard instrument model to organize the command structure The diagram below shows the subsystems concerning the signal flow The following table provides a summary of the FDI2056 capabilities organized according to the SCPI command reference SCPI 1999 Volume 2 The supported commands include IEEE 488 2 Common Commands start with as well as SCPI commands see Sections 3 5 through 3 7 for details In addition to ASCII commands the FDI2056 also supports certain VXI 11 commands also noted in this table Functional Block Commands Function Measurement MEASure Measure with standard settings Equivalent to EE RST READ READ Measure with current settings Equivalent to ABORt INITiate FETCh EE Fetch measurement results previously acquired with READ or INITiate CALCulate CALCulate Cumulative or partial integrals mode CALibration Not used in the FDI2056
33. LCulate TIMestamp CUMulative 0 2 cecccccececesceceneteneeceneeeeeeesaeesaaeeseaeesaseeseaeesaeeseaeenaees 20 3 7 8 CGONTPol ENGoderCGONFioure 21 3 7 9 CONTRol ENCoder POSition 0 2 ccccccceececenteteneeceneeeeneeeseeeceeesaeecssaeesaaessaessaeeeseaeeseeeseaeeeaees 22 3 7 10 DATA COUNt Query on 22 3 7 11 DIAGnostic UPGRade INITiate Event 23 EE DISPIAVETEXTEDATA EE 23 3 7 13 FETCH ARRay Query O ly iriri irarri ie E EEEE aE Eaa 23 3 7 14 FORMaH DA Ta EE 24 3 7 15 FObMat TiMestampl ENADIel 25 3 7 16 FORMat READINGS ALE EE 25 3 7 17 FORMatUNITENAB le iieri dire feelen a E EEE E E E 26 3 7 18 SIN PU COU PING EE 26 I Z SIN PU GAIN EE EE 26 3 7 20 MEASure SCALar VOLTage Query oni 27 3 7 21 MEMory STORe STATe Event 28 3 7 22 MEMofy DELete Ev nt ieissar aa iuie iaa HEEN dee RA Ta aE ARTEEI T EEA 28 3 7 23 READ ARRay Query OMY eecccescecesceceneetenceseneeessceesnencnsneesnaecssaesenaseseaessaasenaeesaseneaseanaees 28 3 7 24 SENSe CORRection ALL ACQuire Event 29 3 7 25 SENSe CORRection ZERo ACQuire Event 29 3 7 26 SENSe CORRection SLOPe ACQuire Event 30 m ETRO el bD iii www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA 3 7 27 2SENSe SAMPler RAT 6 dek aiiai asii E iE E E E i 30 3 7 28 SENS FUNC TON eiee a aee ines be A sde Daeg E a aa A aeaee aaa eaa 30 3 7 29 SYSTem HELP HEADers Query on 31
34. METROO Magnetic precision has a name Fast Digital Integrator FDI2056 User s Manual Version 2 0 Revision 1 2 May 2014 Distributed By GMW Associates 955 Industrial Road San Carlos CA 94070 USA PHONE 1 650 802 8292 FAX 1 650 802 8298 EMAIL salese gmw com WEB www gmw com FDI2056 User s Manual REVISION HISTORY v 1 0 r 1 0 June 2010 v 1 0 r 1 1 June 2010 v 1 1 r 1 0 June 2010 v 1 1 97 1 1 July 2010 v 1 14 1 2 April 2011 v 2 0 r 1 0 April 2012 v 2 0 r 1 1 March 2013 v 2 0 r 1 2 May 2014 Metrrolab v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA First release Update installation procedure Improve readability of screen shots Correct section numbering in Chapter 4 Correct formatting of specifications table Update for version 1 1 software Clarify Windows installation procedure Document Reset register Update for version 2 0 hardware and software SCPI commands added Fix front page graphics Technical specifications updated ii www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA CONTENTS CET RUNG ST AP ED EE 1 1 TATOGUCTON aiiiar arana rene nenbewe aa EAA Aaaa aaa aaan 1 GET RING S VAR ED tbe 3 2 Installation Guid arara raa aa aeaa ar Ta aa aaa aaa aa aaa aaa a aa aaa a aaa aaa aaa aaia aaaea iaaea 3 2 1 FDI 2056 Host Interface panel and Connections esseesseessrieesitreriirssirnstittntiitnetinnstinnnntittnrin
35. O ERROR Zero indicates no error 100 COMMAND ERRORS 102 Syntax error The command header did not match any of the known commands 104 Data type error A parameter within the command was of a type invalid for the command 115 Unexpected number of The wrong number of parameters was given in the parameters command 123 Exponent too large The command contains a numeric parameter that was too large to be stored internally This occurs if the value has an exponent greater than 43 151 Invalid string data The parameters in the command contain an unmatched single or double quote 171 Invalid expression The parameters in the command contain an unmatched bracket 200 EXECUTION ERRORS 221 Settings conflict Indicates that a legitimate program data element was parsed but could not be executed due to the current device state 222 Data out of range Indicates that a legitimate program data element was parsed but could not be executed because the interpreted value was outside the legal range as defined by the device 225 Out of memory The device has insufficient memory to perform the requested operation 300 DEVICE DEPENDENT ERRORS 310 System error System error 363 Input buffer overrun The internal acquisition buffer was overrun This happens when in TIMer triggered mode and when the host did not FETCh the data in time 400 QUERY ERRORS 400 Query error Generic query error 410 Query INTERRUPTED The host has sent a
36. Read only Multiplier Divider BAR4 0x200 0x27C Calibration parameters BAR5 0x300 Display char 1 Display char 2 Display char3 Display char 4 Trigger configuration Fifo BAR2 0x000 Bits 31 28 Trigger source Bits 27 16 Trigger prescaler Bits 15 0 Triggers count The trigger configuration uses a 16 0000 External 0001 PXI 0010 Internal Time Trigger 0011 Software 0100 Bi Phase Index 0101 Bi Phase Pulses positive direction 0110 Bi Phase Pulses negative direction 0111 Bi Phase Pulses 1000 Bi Phase Target A value of 0 will be interpreted as infinite count Words fifo Once the acquisition is started the first line of the FIFO is used to select and count the trigger events as configured by the user As soon as the programmed count in the line is exhausted the system automatically tries to read a new line The acquisition will be marked as completed once no more line is available Since the fifo can be monitored at any time by reading the bit 2 of the Status register it is possible for the user to add a new trigger configuration line each time a line count is Status Register BAR3 0x100 Bit 0 Acquisition complete Bit 1 Data FIFO Event Bit 2 Trigger FIFO Event Bit 3 Calculation Overflow Bit 4 Trigger Overrun Bit 5 System error Metrrolab exhausted letting an infinite number of configuration possible The acquisition is complete the Trigger FIFO having been exhausted The detailed co
37. TUS 3 Run active This bit is set to indicate that the FDI2056 is taking measurements This status bit is similar to bit 3 of STATUS 3 Data Transfer Mode When set this bit indicates that the immediate data transfer mode IMD 1 is selected A value of 0 indicates that the block transfer mode IMD 0 is selected Storage Mode These bits indicate the selected data storage mode command CUM Metrrolab 57 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA 00 Individual values 01 Cumulative values 10 Only the last cumulative value is available Table 4 6 STATUS 7 Acquisition 4 11 DATA ACQUISITION During a measurement cycle the FDI2056 stores all partial integrals and time stamps in an internal buffer This raw material is then converted by the local microprocessor and stored Following this operation data are available to the host computer There are three types of storage for converted data individual cumulative and last cumulative value The CUM command selects the storage mode The processed data may be read in two different ways either one after another or all in one block The IMD command selects the data transfer mode 4 11 1 Individual data storage CUM 0 This is the default data storage mode Measured data are stored separately The data represent the integrated value during a period delimited by two triggers The number of values equals the number of integr
38. The user is requesting information regarding an inexistent unit Invalid encoder The encoder configuration given is incorrect configuration Operation in progress The instrument is currently operating and cannot accept the command Channels don t share the The command requested the value on the default same configuration channel but this value is not shared by all channels present in the system Parameter value has been The user has specified a value for a parameter that rounded or modified to meet cannot be completely satisfied The value has been internal constraints rounded to the nearest value achievable by the system or the value resulted in a change in the system configuration MeTrrolab 39 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA USING THE PDI EMULATION MODE 4 Software interface 4 1 COMPATIBILITIES ISSUES The PDI emulation mode offers a way to help customers who have already extensively used the PDI 5025 in the past to integrate easily this new instrument in their existing installation However the FDI2056 is based on a completely different system and therefore some functionality present in the PDI 5025 have been transformed or removed The following list enumerates all the differences between the two systems PDI 5025 FDI2056 Communication RS232 Hardware configurable Software configurable IEEE488 Available Unavailable Ethernet Unavailable Available
39. _intr_chan destroy_intr_chan device_enable_srq device_intr_srqg and device_abort Historically the functions listed below correspond to dedicated hardware signals in IEEE 488 1 HPIB or GPIB Not all functions are supported in VXI 11 In addition some of these functions are not supported on the FDI2056 the Description column will note whether the function has no effect or whether it returns an error VXI 114 Description device_clear Clears the device input and output buffers device_trigger Assert bus trigger Requests service from host device_readstb Read status byte device_remote Remote Enable no effect device_local Enable local controls no effect Disable local controls no effect device_lock Acquire or release the device s lock device_unlock device_docmd Do special command unsupported returns error 3 5 IEEE 488 2 COMMON COMMANDS As for any IEEE 488 2 compliant instrument the FDI2056 supports the following commands Command Name Description CLS Clear status Clear all event registers and queues not enable registers and error buffer ESE lt value gt Program event Program standard event enable register enable ESE Event enable query Read standard event enable register ESR Event status query Read standard event register and clear it mi ETRO lob 14 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA Command Name Description IDN Identifi
40. a command is issued at a time when it is not appropriate Bit 4 Over range Error This bit is set each time the input voltage of any channel reaches the positive or negative over range threshold Note An over range error has no effects before the first trigger mi ETR olab 51 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA Bit 3 Bit 2 Bit 1 Bit 0 when waiting for a synchronization signal or the absolute value of the first trigger for example After this first trigger an over range condition aborts the measurement cycle immediately and has a similar effect to the reception of a BRK command see section 4 11 7 The run abort can be disabled with the command NBO STATUS 4 indicates which over range has occurred End of RUN This bit is set at the end of each measurement sequence or after the receipt of a BRK command when the Trigger Source is External It does not mean that the conversion of all the measured data has been completed Data Ready The precise setting of this bit depends on the transmission mode selected by the IMD command a In the continuous transmission mode IMD 1 this bit is set each time a value is available When STATUS 1 is read this bit is cleared but is immediately set to 1 if there is still data in the buffer b Inthe block transmission mode IMD 0 this bit is set as soon as all the measured data have been converted and are thus ava
41. al Instruments VISA is supported by all major instrumentation manufacturers and NI VISA provides excellent cross platform compatibility Windows Macintosh or Linux It is easy to develop custom software for the FDI2056 especially in LabVIEW using Metrolab s FDI2056 Application Programming Interface API Finally keep your FDI2056 accurate and up to date by having it recalibrated at regular intervals The recommended calibration interval is every 12 months At this time Metrolab will also install the latest available firmware You can also download the latest software and manual free of charge We post all updates on our website The easiest way to be notified of updates is to sign up for our electronic newsletter published twice a year please see the Newsletter Subscription page of the News section of Metrolab s website www metrolab com m ETR olab 1 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA We hope the FDI2056 will help you perform your magnetic field measurements easily and accurately If you have problems and your retailer cannot help you further the Metrolab team is ready to help Even if you don t have problems we are always interested in knowing more about how our instruments are used Feel free to contact us at any time at contacts metrolab com mi ETR olab 2 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technolog
42. an true false SingleEnded Boolean true false Sync Edge disabled enumeration rising falling both The SYNC and ERROR signals share the same connector pin When enabled the SYNC input takes precedence over the ERROR function 4 3 MOTOR SOFTWARE INTERFACE Since the FDI2056 does not incorporate a motor driver and since the PDI 5025 which di provide such interface offered a set of command to handle the motor we have decided to offer a software layer to help our customers wishing to continue to use the synchronization capability offered by the original command set Be warned this is a very rough interface and we do not handle precise positioning Basically this software interface is a Dynamic Linked Library DLL which offers four entries e void Start unsigned int Direction The emulator will call this procedure each time the motor must be started The Direction parameters must be set to 1 to specify a forward positive direction and to 0 to specify a backward negative direction The definition of forwards and backwards must respect the definition of the direction you have set during the configuration of the Bi Phase decoder See previous chapter e void Stop The emulator will call this procedure each time the motor must be stopped e void Initialize The emulator will call this procedure when it starts You may proceed in this procedure to all initializations needed by your motor driver mi ETRO lob
43. and This command is only used to read the measured values and must not be sent to read the status registers FPT 1 Default n 1 enables the front panel trigger input Front Panel Trigger FPT n n 0 disables the front panel trigger input MeTrrolab 68 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA SYNTAX DESCRIPTION MNEMONIC Note this command can only be used when TRS X or TRS X S has been previously executed A typical application of this command is to disable unwanted external trigger pulses STH d Returns STATUS d in Hex 2 ASCII char STatus Hex STB d Returns the STATUS d in Binary 8 ASCII STatus Binary char d 1to7 Note if d is omitted STATUS 1 is returned by default The first and last characters are respectively MSB and LSB DSP i xxxx Sends string XXXX to the display of the DiSPlay selected channel The string can be of any length but only the first four characters are displayed This command overwrites previous displays and the new display remains on until another command which sends characters to the display is executed DSP SGA TST ADJ etc If xxxx is omitted the normal display Gain and channel is shown i A B or nothing means all channels and nothing means the active channel or channels The commas have to be present in all cases VER Returns the software revision number VERsion CVR i Clears over range of c
44. annels Ff ADJ 1 Performs a measurement immediately to ADJust compensate the offset Note The input will not be short circuited It is therefore up to the user to either externally short the input or send the ISC command before this operation Failing to ensure clean initial conditions may lead to poor measurement results and high drift When the selected integrator channel enters the Offset Adjust Mode it automatically performs an average of the input signal during 2 seconds This averaged measurement is used to zero the offset Once the mean is achieved the instrument MeTrrolab 65 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA SYNTAX DESCRIPTION MNEMONIC automatically leaves the adjustment mode and asserts the End Of Run bit in the STATUS 1 Each time you perform a compensation using one of the ADJ commands the parameters will remain active until a new use of an ADJ command These compensation parameters are automatically lost at POWER OFF gt ADJ 0 or ADUJ i 0 Stop the OFFSET ADJUST mode on the selected channel If the selected channel is not in OFFSET ADJUST mode the command is ignored K ADJ i 2 Performs a full compensation of both the offset and the gain for the current gain This operation is performed for the current gain gt ADJi 3 Same as ADu i 2 but in addition store the parameters in the integrator channel s non volatile memo
45. ation periods Bits 1 and 0 of Status 7 are set to 0 4 11 2 Cumulative data storage CUM 1 S The value cumulated from the start of the measurement is stored in memory at the end of each integration interval If the command NBO 1 has been sent previously to the FDI2056 the cumulative value is cleared to 0 zero at each occurrence of an over range At the end of a run the number of available measurements data is identical to the number of integration periods Bits 1 and 0 of Status 7 are set respectively to 0 and 1 4 11 3 Last cumulative data storage CUM 1 L This mode stores only the last cumulative value That means when a reading is performed the integrated value from the beginning of the run until the last trigger preceding the reading time is transferred This mode is incompatible with the block data transfer IMD 0 and forces an immediate data transfer mode IMD 1 With an adequate TRI sequence this mode allows the user to use the FDI2056 as a fluxmeter mi ETRO Joly 58 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA 4 11 4 Direct Data Transfer IMD 1 This is the default data transfer mode Measured data are read individually As soon as the measured data have been processed the Data Ready bit in STATUS 1 is set This happens even if the measurement cycle has not been completed Thus it is possible to collect data as the measurement proceeds and so free
46. cation query Returns the following information manufacturer model serial number and version of electronics and firmware Note that this query returns Arbitrary ASCII Response Data see IEEE488 2 standard and cannot be followed by another query in the same command sequence OPC Set operation Set the operation complete bit in the standard complete event register after all commands have been executed OPC Operation complete Returns an ASCII 1 after all commands query have been executed AST Reset Reset device to power on configuration SRE lt value gt Program status Program status enable register enable Important you must also enable service requests on the host See Section 3 8 for details SRE Status enable query Read status enable register STB Status byte query Read status byte register TRG Trigger Generate bus trigger TSi Self test Query Perform complete self test return 0O if successful 1 if not WAI Wait to Continue Wait until previous commands have completed 3 6 SCPI COMMAND SYNTAX In the command definitions below the following conventions are used optional keywords or parameters lt gt value channel number When omitted the command assumes all channels to be selected Each optional value is separated by this symbol The abbreviated form of each command is written in capital letters For example the MEASure command can be written as MEASURE or MEAS or since capitalizatio
47. d MOT in the backward direction respectively the FW and BW front panel LEDs are lit RUN Starts the programmed measurement sequence Having already performed the MOT A command the motor starts in the direction defined by the TRI command Note When executed before the completion of the sequence of measurements the RUN command generates a syntax error BRK Stops the measurement sequence and the BReak motor Terminates an external trigger measurement EOD at an Defines an end of data string End Of Data al an decimal ASCII code of characters defining the end of data Default Z When the measurement buffer is empty the string al an is returned following the ENQ command Note At power on or if a1 an is omitted the ASCII Dec 26 CTRL Z character is used as the default end of data string CUM 0 Default Integrated values are stored separately CUMulative CUM 1 S The cumulative value from the start of the measurement is stored in memory at the end of each integration interval If the command NBO 1 has previously been sent to the FDI2056 the cumulative value is cleared to 0 at each occurrence of an over range CUM 1 L Only the last cumulative value is stored and available for reading This mode is MetTrrolab 67 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA SYNTAX DESCRIPTION MNEMONIC incompatible with the block data
48. d data extraction commands followed by miscellaneous commands This does not however signify that they must be executed in this order SYNTAX DESCRIPTION MNEMONIC CHA A Default Select channel A CHAnnel CHA B Select channel B CHA Select both channels A and B Note This command is valid only if the FDI2056 is equipped with two channels Trigger source selection see section 6 6 TRS T Default Timer without external synchronization TRigger Source Timer TRS T S Timer with external synchronization TRigger Source Timer Synchro TRS E Incremental encoder without index signal TRigger Source The encoder can be rotational or linear Encoder TRS E S Linear incremental encoder with index TRigger Source signal This command can also be used with linear or rotational encoders which are not supplied with an index signal and for which the zero position must be defined externally IND commana Metrrolab 63 Encoder Synchro www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA SYNTAX DESCRIPTION MNEMONIC TRS E d d Rotational incremental encoder with dd TRigger Source cycles per turn and with index signal rotational Encoder Note The decoder module counts 4 pulses for each encoder cycle TRS X External hardware trigger The hardware TRigger Source trigger is fed into the appropriate input of eXternal the acquisition module TRS X S External hardware trigger wi
49. e CALCulate FLUX CUMulative command to control the integration mode Use the FETCh ARRay command to retrieve all remaining data corresponding to a preceding READ ARRay or INITiate command Using the OPC command you can also generate a ReQuest for Service RQS when a measurement or any other action is complete Set bit 0 of the Standard Event Enable register and the ESB Event Summary Bit in the Status Enable register Now the execution of an OPC command will generate an RQS Be sure to check the status after every command The Standard Event Status register provides a general idea of what went wrong and the message on the Error Event Queue retrieved by SYSTem ERRor provides a detailed diagnostic See the SCPI standard for the exact interpretation of these error messages It may be convenient to set up the Enable bits to generate a ReQuest for Service RQS when an error is encountered Error codes mi ETR olab 37 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA Error codes returned by the native host interfaces are numbered according to the SCPI standard Sections 21 8 9 through 21 8 16 of Volume 2 of the SCPI manual Command Reference provide a generic description of all possible error codes In general the codes are between 800 and 300 This chapter describes only the error codes produced by the FDI2056 and the circumstances that might produce each error 0 N
50. e or more generally when any access is made to the SATA port 2 2 FDI2056 FRONT PANEL AND CONNECTIONS e 1 a 8 Metro OVR v OVR 10 FDI2056 Encoder Ext Trigger IN OUT The 4 character display indicates the FDI2056 s current gain or state The signal amplitude can be monitored on the LED bar graph The effect of changing the gain will be immediately visible If the OVR and OVR lights come on the measurement can be considered questionable Encoder input connector and LED When using a rotational or linear encoder in your measurement system this input will let you generate trigger signals which can be used to accurately synchronize your measurements to your mechanical system See section 2 2 1 for the connector pinning description The coil can be connected to the FDI2056 either via the two LEMO 00 connectors IN and IN or via the single LEMO 0B connector The FDI2056 is supplied with a 10 m cable with a LEMO 0B connector The FDI2056 coil input characteristics can be adapted for your application See Section 5 2 for details The REF CLK 20MHz allows the FDI2056 time base to be checked with a precision counter Please note that the reference oscillator is the one located on the board plugged into slot 2 This yellow LED blinks each time a trigger event is internally generated when making a measurement mi ETR olab 4 www metrolab com
51. e over range detected A write cycle clears this bit Bit 7 Negative over range detected A write cycle clears this bit FIFO status BAR3 0x10A Read only Bit 0 Data FIFO is not empty Data must be collected Bit 1 16 Words Transfer may be performed Data FIFO contains more than 16 32 Bit words When this condition is set you may try to get data by burst However with a PC computer this is a very tedious task Bit 2 Data FIFO over run Data acquisition is faster than your data collecting process Data have been lost Bit 3 Data FIFO under run You read more data than the FIFO content Bit 4 Trigger FIFO full You must wait before providing a new trigger configuration Bit 5 Trigger FIFO overrun You provided too much trigger configuration Trigger configurations were lost FIFO status BAR3 0x10B Read only Bit 0 Synchro Bit 1 Trigger Metrrolab 78 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA PXI Star trigger enable and configuration BAR3 0x10C For PXI Star only Bit 12 0 Bit numbering is directly related to device slot numbering When set the related device will receive a trigger pulse from the STAR Trigger Bit 17 16 PXI trigger delay For board configured as PXI Star sampler delay Sampler delay For board configured as PXI Device PXI trigger delay Sampling rate period BAR3 0x120 Expressed as a multiple of the system clock Internal time trig
52. en converted the Data Ready bit is set bit 2 STATUS 1 To initiate the block transfer the host computer must send the ENQ command The instrument will then transmit all the data in the order that it was measured The returned value is expressed in 10 8 Vs followed by a space and then the channel identifier e g 45982900 A Each value is separated by the CR LF pair of characters If more than one channel is active the values are sent in decreasing channel order i e for a two integrator channel instrument Channel B values will be sent before the values for Channel A mi ETRO Joly 59 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA The End Of Data string default Ctrl Z is emitted immediately after the last data value The End Of Data string can be programmed with the EOD command see section 4 11 6 Note If the External Trigger is used then the measurement cycle must be terminated by the BRK command This will end the cycle and allow the data to be read in the Block Transfer mode Important Note This mode is incompatible with CUM 1 L and therefore cannot be executed in this case 4 11 6 End of Data EOD The End of Data string sent by the instrument when the buffer is empty and the host requests to read data can be programmed by the host computer By default the End of Data string is the character Ctrl Z ASCII 26 The EOD command allows the End of Data st
53. es that the arm source is fed by the trigger in signal found on the front panel The slope to be used is configured using the command ARM SEQuence LAYER EXTernal POLarity mi ETR olab 17 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA INTernal Specifies that the arm source is fed internally Used only on an instrument having multiple channels which need to work synchronously TIMer Specifies that the arm source is fed by the internal periodic signal source The rate at which this source ticks is set using the command TRIGger SEQuence TIMer RATE BUS Specifies that the arm source is software triggered The command generating this trigger is TRG Example ARM SOUR IMM Sets the arm event to IMMediate ARM SOUR OPTions The above command will return the following string IMMediate SYNChro ENCoder EXTernal INTernal TIMer BUS 3 7 3 ARM SEQuence LAYER ENCoder Sets the encoder position at which the arm detection layer is satisfied letting the system enter the trigger layer Syntax ARM ENC oder numerical value no units ARM ENC oder DEFault Default 0 Arguments The numerical value represents the absolute position of the encoder expressed as a number of internal pulses Four 4 pulses are generated for every encoder line A 1024 line encoder will generate 4096 internal pulses Example ARM ENCoder 127 As soon as the absolute position 1
54. es the fundamental unit of flux voltage and timestamp Not used in the FDI2056 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA 3 3 IEEE 488 2 SCPI STATUS REGISTERS IEEE 488 2 compliant instruments have at least two registers the Status Byte and the Standard Event Status Register SCPI adds the Operation Status Register Questionable Status Register and Error Event Queue The diagram below taken from the SCPI standard provides a good summary This section describes how the FDI2056 uses these status registers QUEStionable Status Error Event Queue 0 1 2 3 4 5 6 7 8 H 10 Available to designer Avaliable to dasigner Available to designer Available to designer INSTrument Summary Command ming NOT USED Waiting for TRIGger Summary Waling for ARM Summary COARecting NSTrument Summary PROGram Running NOT USED Standard Event Status Register Available to dasigner Available to designer vent Queve or Available to designer MAV Summary of IEEE 488 2 Status Structure Registers The use of Bit 15 is not allowed since some controllers may have difficulty reading a 16 bit unsigned integer The value of this bit shall always be 0 3 3 1 Status Byte Contains a 1 byte status summary The FDI2056 uses the following bits Bit Name Description 2 EAV Error AVailable in Error Event Queue 3 QSB Questionable Summary Bit 4 MAV Message AVailable
55. g any measurements A significant drift might be measured if this precaution is not taken SS 2 The first operation performed by the instrument is an internal status check of every integrator channel During this operation the text TEST is displayed on every tested channel Should the instrument detect any problem one of the following message could be displayed on the faulty channel MEM NP ICAL ICOM HWU Actions that could be undertaken if such a situation should arise are described in chapter 4 11 9 mi ETRO Jala 6 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA 3 The Status indicator will then show a numerical value reflecting the current gain setting Should the first channel display A 10 this would indicate that the PDI 5025 emulation mode has been selected 4 As long as the computer is internally in reset mode the bright blue light at the right bottom of the FDI2056 front panel stays lit 2 5 SOFTWARE DEVELOPMENT e Insert the installation CD e Copy the Source folder to your hard drive The API subfolder contains the Application Programming Interface e Modify the FDI2056 measurement software or write a measurement system from scratch using the LabVIEW development system mi ETR olab 7 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA PROGRAMMING T
56. ger rate period BAR3 0x124 Expressed as a multiple of the system clock 5 3 INPUT ADAPTATION The IN and IN coil inputs can be optimized for your coil signals The schematic diagram below shows an excerpt from the FDI2056 input circuitry i RLS D Ga RL6 D ee E R162 Drei lag Bei R161 A LEMO 0C RLSB Pe ee ge 2 Cae O IN LM6 gt COIL_ mz E 304 R75 Gain 1 ec R66 SE sl Ziel 4 ain 5 4 GNDA 51 v 4 3i k e Ce 180 slg GJ Su VREF D VREF RL5 B RL6 B Sp e amp DE Goin 0 05 sms Ge a z z 8 LEMO 2PF 5 z J 3 5 m7 2 e a 5 Ye ye z E 2 d S JUMP ACND ome E SHIELD A z D a y T E HE Gain 0 05 Ze EIS ka og S W Z RL1 8 Hag J 8 ZE da 3 R65 IN LEMO C a 6 wit ST sre LM8 gt A a KH Les isok Concor El Spey OF 7 En RL3 D RL4 D REEN RL1 D Ge RL2 D ieee LeMo ec SN asi e2 o po l Beil rise ZA ou weil sr E E GNDA 1 a R27 and R46 can be mounted to tie IN and IN respectively to ground By default these are not mounted so that both are floating inputs C18 can be used to filter common mode HF noise By default this is used as an anti aliasing filter for the ADC with a cut off at around 10 kHz C136 and C128 can be used to filter HF noise on IN and IN respectively relative to ground By default these are no
57. gnal source The rate at which this source ticks is set using the command TRIGger SEQuence TIMer RATE Specifies that the trigger source is software triggered The command generating this trigger is TRG mi ETR olab 34 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Example TRIG SOUR TIM Sets the trigger event to TIMer 3 7 42 TRIGger SEQuence COUNt Determines the number of triggers needed to perform a full measurement Syntax TRIGger SEQuence COUNt lt numerical value no unit gt TRIGger SEQuence COUNt DEFault Default 2 Arguments The numerical value given expresses the number of triggers that must occur before a measurement can be completed Example TRIG COUN 1024 Ask for 1024 trigger events before finishing a complete measurement 3 7 43 TRIiGger SEQuence ECOUNt ECOunt specifies a particular number of occurrences of the same event that must be recognized Syntax TRIGger SEQuence ECOUNt lt numerical value no unit gt TRIGger SEQuence ECOUNt DEFault Default 1 Arguments ECOunt acts as a prescaler The numerical value must be a positive value of 1 or greater Example TRIG ECOUN 10 The tenth count of the source signal will generate a trigger pulse 3 7 44 TRIGGER SEQuence EXTernall SLOPe Configures the transition detector of the external input trigger signal to generate a trigger condition on a specific edge
58. hannel i i A B Clear over range or Note the or over range LED lit on the front panel bargraph display is switched off If it is omitted the command is executed on the active channel or channels The CVR command is automatically executed following the RUN and SGA commands HOA Returns the current Gain of channel i i A Read GAin B aa 0r t RGA B Returns the current Gain of channel B Read GAin Note If no parameter is given in the RGA command the Gain of the active channel MeTrrolab 69 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA SYNTAX DESCRIPTION MNEMONIC is returned If many channels are active A is the active channel by default RCT Reads the counter of the Trigger Factory Read CounTer After reading the counters the FDI2056 converts the result to decimals and transfers it in the format ddd d Leading zeroes are suppressed Note In the TRS E d d mode the counter values returned are always positive and represent the number of pulses counted following the index signal there is no indication of the number of turns ZCT Resets the counters of the Trigger Factory Zero CounTer Default Automatic at power on Warning Using this command requires particular care Use only for specific and well defined applications Resetting the counters to zero during RUN will perturb the sequence of measurements NBO O Default The occu
59. ht bits and can be read by the host computer in two different formats in either hexadecimal or binary The registers are numbered 1 to 7 To read a status register the host computer must send either of the commands shown below STH n Where n n 1 to 7 is the number associated with the status register If n is omitted then the value of 1 is assumed This command generates a two character reply representing the value of the status register in hexadecimal STB n Where n n 1 to 7 is the number associated with the status register If n is omitted then the value of 1 is assumed This command generates an eight character reply 0 or 1 representing the value of the status register in binary The first character in the string corresponds to the most significant bit of the status register and the eighth character to the least significant bit The detail of the seven status registers is given in the following tables STATUS 1 Measurement Status 1 Byte This status byte is cleared as soon as it has been read except for bit 7 which is only cleared once STATUS 2 has been read Bit 7 Status 2 Flag This bit is set to indicate that STATUS 2 is not zero and that it should be read Bit 6 This bit is always read as 0 Bit 5 Command Error This bit is set each time that a command sent by the host is not syntactically correct either because the mnemonic is unknown or because one or more values are incorrect This error is also generated when
60. ilable to the host Trigger This bit is set on receipt of the trigger signal occurring during a measurement cycle The trigger can be internally or externally generated Synchro This bit is set each time a signal is detected on the SYNC input or on the encoder index input This can be used to synchronize the host computer software with the pulse from the index of an encoder Table 4 1 STATUS 1 Measurement Status STATUS 2 Error Status 1 Byte Bit 7 This status byte is cleared as soon as it has been read this also clears bit 7 of STATUS 1 This bit is always read as 0 MerrRolab s wm metrotab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 This bit is always read as 0 This bit is always read as 0 Power on reset This bit is set at power on Autotest failed This bit is set if the autotest detects an error in the instrument The exact cause of the error can be found by examining STATUS 5 and STATUS 6 Encoder count error This bit is only valid if used with an encoder providing an index Each time the index is detected the instrument verifies if the amount of pulses counted from the previous occurrence is correct If an error is found this bit is set Measurement buffer full When the instrument s internal buffer is full this bit set to indicate this error This error will stop the current measuremen
61. is bit is set to 1 when one or more values measured during the autotest are out of tolerance The AUT command allows the host computer to access the values measured by the autotest see section 4 11 9 Negative over range not reported This bit shows that a deliberate negative over range was not detected during the autotest and reports this error Positive over range not reported This bit shows that a deliberate positive over range was not detected during the autotest and reports this error Negative over range erroneously reported MetTrrolab 56 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA Bit 0 An over range was detected in the presence of a negative input signal which should not have produced this report Positive over range erroneously reported An over range was detected in the presence of a positive input signal which should not have produced this report Table 4 5 Status 5 amp 6 Autotest STATUS7 Acquisition 1 Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bits 1 0 This bit is always read as 0 This bit is always read as 0 Timestamp Transfer Mode When set this bit indicates that the timestamp will be transferred with the data IMD x T Infinite sequence active When set this bit indicates that an infinite trigger sequence is in progress An infinite sequence is selected with ni in the TRI command This bit is similar to bit 4 of STA
62. ition of the encoder when it first occurs after the IND s command If s is specified the motor is moved until the first SYNC pulse is received If s is not specified the instrument waits at the current position for the SYNC pulse After this the PDI 5025 behaves in the same way as the linear encoder with an index 4 9 2 4 Linear or Disk Encoder without Index or External Synchronization TRS E The TRS counter is cleared by the RUN command Warning The mathematical sign of the absolute position a must be the same as that of the direction s in the TRI command 4 9 3 Trigger Source External A trigger signal can also be fed externally and is selected by sending the TRS X or TRS X S command In this case the TRI command does not serve any purpose since the triggering sequence is not controlled internally mi ETR olob 49 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA The external trigger source the active edge of which can be selected by software Please refer to chapter 4 2 must be connected to the input denoted External Trigger IN of the integrator channel Note H the option external trigger is dispatched is selected the trigger signal will be fed to all integrator channels present in the instrument In this particular case the trigger must be fed to the first integrator channel located on slot 2 only By choosing this option you alleviate yourself the burden of
63. ive DEFault Default OFF Arguments 0 Disables the accumulation 1 Enables the accumulation Example Assuming that the internal time trigger is set at 1 kHz a trigger will take place every 0 001 second Then enabling the timestamp accumulation by issuing the following command CALC TIM 1 mi ETR olob 20 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA will result in the system reporting for the first three timestamp values 1 0 e 3 S 2 00e 3 Di 3 00e 3 Bin s If the accumulation mode is unset the system will report for the first three values 1 0 e 3 S 1 00e 3 S 1 00e 3 Bin 3 7 8 CONTRol ENCoder CONFigure Configures how the quadrature signals fed to the front panel connector must be decoded Syntax CONTRo1 ENCoder CONFigure lt Configuration gt CONTRol1 ENCoder CONFigure DEFault Default SING1e A B INDex ERRor ROTational 1024 Arguments The lt Configuration gt quoted string is made of three different fields separated by a comma First field SING1le DIFFerential Specifies if the encoder provides differential or single ended signals An internal differential to single ended buffer is located in the system and is enabled when needed Second field A A B B INDex INDex ERRor ERRor The slash symbol preceding the signal name states that the signal must be negated before use If either or both of the INDex
64. lization by writing two successive values will guarantee enough time for the system to settle Interrupt Enable BAR3 0x102 Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Enable status bit 0 condition Enable status bit 1 condition Enable status bit 2 condition Enable status bit 3 condition Enable status bit 4 condition Enable status bit 5 condition Enable status bit 6 condition Global interrupt enable Interrupt Pending BARS 0x103 Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Status bit 0 condition is pending Status bit 1 condition is pending Status bit 2 condition is pending Status bit 3 condition is pending Status bit 4 condition is pending Status bit 5 condition is pending Status bit 6 condition is pending Metrrolab 75 www metrolab com FDI2056 User s Manual Bit 7 unused Gain configuration BAR3 0x104 Register value 0 O N Oo a F ON eh zech 8 sch sch O 12 13 to 15 Gain 0 1 0 2 0 4 0 5 1 0 2 0 4 0 5 0 10 0 20 0 40 0 50 0 100 0 0 1 v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Any other value could result in a gain change and should be avoided Signal path and voltage reference configuration BAR3 0x105 Bit 6 Bit 5 2 Override gain linking By default the voltage reference is automatically set according to the value specified in the Gain Configuration Register i e the voltage reference is linked to
65. mmands INPut COUPling SENSe CORRection MEMorized mi ETR olob 29 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA 3 7 26 SENSe CORRection SLOPe AC Quire Event Proceed to an offset and slope correction on a channel When proceeding to the offset correction the input is not shorted It s up to the user to proceed to that operation if needed Syntax SENSe CORRection SLOPe ACQuire Example SENS CORR SLOP Starts an offset and a slope correction Related commands INPut COUPling SENSe CORRection MEMorized 3 7 27 SENSe SAMPler RATe Defines at which rate the sampler must acquire the incoming signal Syntax SENSe SAMPler RATe lt value HZ gt DEFault SENSe SAMPler RATe DEFAult Default 500 KHZ Example SENS SAMP 100 KHZ Set the analog to digital converter sampling rate to 100 kHz 3 7 28 SENSe FUNCTion Defines how the sense subsystem must consider the incoming signal Syntax SENSe FUNCTion OFF VOLTage FLUX DEFault SENSe FUNCTion DEFAult OPTions Default FLUX Arguments OFF Turns the sense subsystem off VOLTage Senses the input voltage FLUX Integrates the input voltage Example SENS FUNC OFF mi ETRO Joly 30 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA This command turns the sense subsystem off No value can be read from that channel in that mode 3 7 29 SYSTem
66. n doesn t matter measure or meas The following special parameters are recognized by most commands MINimum MAXimum DEFault and OPTions m ETR olob 15 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA The command syntax lt command gt MAXimum MINimum can be used to query the maximum or minimum values for all parameters of a command Command parameters may also be set to their default values by omitting them To insert a parameter after an omitted parameter be sure to maintain the commas as placeholders Numeric parameters sometimes require units Analogously the values returned by queries contain units as specified by the UNIT command In addition some units can have prefixes N nano 10 U micro 10 M milli 10 K kilo 10 MA mega 10 G giga 10 The FDI2056 recognizes the following units Base unit Multiplier Description WB M U N Weber S M U N Seconds V M U N Volts Hz G MA K Hertz However it is possible to add specific units which are directly related to the flux measurement As an example if one knows the area of a coil it may add a Tesla unit by specifying the multiplying factor needed to convert one Weber Wb to one Tesla T 3 7 SCPI COMMAND DESCRIPTION Commands either set of query values Some commands both set and query some only set and some only query Particular commands might generate internal
67. ncoder connector is used to leave the arm level NEGative A transition from high to low of the synchronization signal found on the encoder connector is used to leave the arm level EITHer Is a conjunction of both POSitive and NEGative conditions Example TRIG EXT POS Configures the transition detector to generate an event each time a positive transition occurs on the external input trigger signal 3 7 6 CALCulate FLUX CUMulative Enables or disables the accumulation of partial integrals values mi ETR olab 19 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Syntax CALC FLUX CUMUlative Boolean DEFault CALC FLUX CUMUlative DEFault Default OFF Arguments 0 Disables the accumulation 1 Enables the accumulation Example f a constant voltage of 1 volt is fed to the system configured to measure a partial integral every 1 second every partial integral will evaluate to 1 WB Then issuing the command CALC FLUX 1 will result in the system reporting for the three first value 3 1 000e0 WB 2 000e0 WB 3 000e0 WB If the accumulation mode is unset CALC FLUX the system will report for the first three values 3 1 000e0 WB 1 000e0 WB 1 000e0 WB 3 7 7 CALCulate Tl Mestamp CUMulative Enables or disables the accumulation of the timestamp Syntax CALC TIMestamp CUMUlative Boolean DEFault CALC TIMestamp CUMULat
68. ndition which generated this event is available in the FIFO status register bits 0 to 3 The detailed condition which generated this event is available in the FIFO status register bits 4 and 5 The detailed condition which generated this event is available in the Data processing reported events register More than one trigger event was detected between two data acquisitions ADC or Encoder error More details on the reasons which 74 www metrolab com FDI2056 User s Manual Mode BARS 0x101 Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Enable acquisition Enable trigger Enable internal time trigger unused Float64 results Sampler Mean Loopback v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA generated this event are available in the Acquisition processing reported events register Enable the acquisition process Enable the triggering system Enable the internal time trigger to operate ek gt Results are Float64 0 gt Results are Float32 gt Sampler 0 gt Integrator ch gt Mean is measured for 2 20 samples For memory diagnostic purpose Data written to BAR2 may be read back on the same access port Acquisition and Trigger must be started before any triggers can be sent It means also that the Self Trigger cannot be started simultaneously with the two others Otherwise the first partial integral might be wrong Doing this initia
69. ng the FDI2056 to use an encoder it is of upmost importance to check that the rotational direction is in accordance with the two LEDs denoted FW and BW located on the front panel of the channel into which the encoder is plugged 3 7 9 CONTRol ENCoder POSition Used to set the zero of a linear or rotational encoder having no index When used as a query this command returns the current position of the encoder Syntax CONTRo1 ENCoder POSition lt numerical value gt CONTRol ENCoder POSition Arguments The lt numerical value gt is used to set the current position of the encoder Example CONTR ENC Returns the current position of the encoder 3 7 10 DATA COUNt Query only Returns the amount of data available in the instrument fifo This value may be directly used to fetch this amount of remaining data Syntax DATA COUNT P Example DATA COUN mi ETR olab 22 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA Returns the amount of data available in the instrument fifo This value may be equal to zero 3 7 11 DIAGnostic UPGRade INITiate Event Initiates a firmware upgrade Syntax DIAGnostic UPGRade INITiate The DlAGnostic UPGRade INITiate command is intended for use by the manufacturer only It can cause your FDI2056 to become nonoperational 3 7 12 DISPlay TEXT DATA Displays some text on the 4 digit display located on the channel fron
70. nnntnnnnenne 3 2 2 FDI2056 front panel and CONNECTIONS A 4 2 2 1 Description of the encoder input Micro D connect 5 2 3 Communicating with the FDI2056 0 0 0 eceeececeeeeeeeeeeeeeeeeeceaeeeeaeeseaeeseaeeseaeeseaeeseaeessaeeseaeessaeeteneeenaeesias 6 e Str EAR e EE 6 2 5 Sotware Developmen EE 7 PROGRAMMING THE FDI2056 use 8 3 VXI amp SCPI standard interfaces cccccccecssseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 8 ch Host Niera E tits cece hehe See hentia he tcl ed ee ees eet ede aida Ea ated te 8 3 2 SCPlinstrument model wis ccecehecat alti aid tie diated deeg evil a Ea 8 3 3 IEEE 488 2 SCPI status registers AAA 10 E WEE 10 3 3 2 Standard Event Status Heotster 11 3 3 3 QUEStionable Status EEN 11 3 34 E el EE 11 3 3 5 OPERation PARarameters se asneeenenneeenneeennernneenneenerenernneenneennraneranernnrenerenennneennennnrenennneenneen 12 3 4 IEEE Apres vegies a ypa aeaa naa rE eee nace ee eee nee Wiel tee ee EE E 14 325 IEEE 488 2 common commands EE 14 Ee deu EN Eu eA Sa A ee ne eee 15 3 7 SCPI command description eiin ieii a a E i idan addenda ee 16 3 7 1 ABORT TEE 17 3 7 2 APHMat GEOuencelllAvERHLGOUlfice 17 3 7 3 APHMat GEOuencellLAvERLENG oder 18 3 7 4 APHMat GEOuencelllAvERHLGSvNChrol St Ofe 18 3 7 5 APHMat GEOuencell AELK femal GL Oe 19 3 7 6 CALCulate FLUX CUMUIAtIVE 2 cccccceececeneeeeneeeeneeeeeeeeeseeeseeeeaaecsaaeesaaeesaeesaaeeseaeesaeeseaeenaees 19 3 7 7 CA
71. offset of the acquisition module the input signal is measured during at least two seconds at a very high sampling rate 500 kKSPS and the mean is used to zero the offset This operation is performed as soon as the ADJ command is sent to the instrument This automatic adjustment is made for the current input gain only You may either decide to use the internal switch to short circuit the input coil or to use your own external short circuit taking into account thermocouple and other effects To short circuit the measurement coil you must issue the ISC command 4 11 11 Synchronization by the Host Computer SYN As already mentioned in section 6 6 it is possible to synchronize a sequence of measurements with an external event This can either be a signal supplied to the SYNC input of the acquisition module or it may be the SYN command generated by the host computer When the user has defined the source of the trigger with external synchronization TRS T S TRS E S or TRS X S the instrument will once it has received the RUN or IND commands wait for the external signal on the SYNC input or the SYN command before starting the measurement cycle mi ETRO lob 62 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA 4 12 PDI 5025 EMULATED COMMANDS All the PDI 5025 emulated commands are listed in tabular form in this section in their order of use beginning with initialization measurement an
72. quence may be returned to the host and checked by issuing a TRI command 4 9 PROGRAMMING THE INTEGRATION INTERVALS The TRI command is used to define the integration intervals which are delimited by successive trigger events The syntax of this command is explained below TRI s a n4 C4 nj Cj CRLF where m ETR olol 46 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA S 0r the direction of the movement default a value the absolute position of the first trigger condition default 0 nj 1 to 65535 or the number of intervals of Cj pulses or counts means infinite number of intervals Cj 1 to 223 the number of encoder pulses or time counts between triggers always positive i 1 to 20 the number of different measurement parameters pairs An infinite number of integration intervals can be selected in the TRI sequence nj This means that once the run is started it will continue until a break command BRK or a buffer full condition occurs Any length of integration period within the limits 1 2 pulses or milliseconds can be associated with an infinite sequence Any finite sequence can precede an infinite sequence in the TRI command but the infinite sequence has to be the last one of the series If the reading of the measurement results is performed faster than the triggering the buffer will never get full and the run will last forever If the la
73. r m ETR olab 11 www metrolab com FDI2056 User s Manual Bit Name 6 Waiting for ARM 7 CORRecting 8 Parameters 9 Data available 10 Encoder index v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Description Waiting for arm Correcting the offset or the slope Parameter has changed Internal data buffers are not empty Index has been detected 3 3 5 OPERation PARarameters This is a fan out for bit 8 of the OPERation register a device specific summary bit It indicates subsystems whose configuration has changed Bit 0 LO EE n fon Oo EES ies ke N Subsystem name ARM CALCulate CONFigure CORRection DISPlay FORMat INPut SENSe STATus SYSTem TRIGger UNIT MEMory As shown in the figure below taken from the IEEE 488 2 standard each of the registers above is actually a set of three registers Metrrolab 12 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA Device status continuously monitored Transition BEZ DIS NTRansition 15 14 13 Transition selection a ENABIe Condition Register CONDition Read only register that is constantly updated to reflect the current state of the instrument Event Register EVENT Transitions in a Condition Register are memorized in the corresponding Event Register Most FDI2056 registers only latch transitions from 0 to 1 some are configurable using the Positi
74. r gt lt Number gt refers to the number of the channel Example FORM READings ALL INP GAIN This command might return 10 n FORM READings ALL 1 INP GAIN This command might return CH1 10 CH2 100 n mi ETR olob 25 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA 3 7 17 FORMat UNIT ENABle Determines if the measurement results must be followed by the unit Syntax FORMat UNIT ENABle lt Boolean gt DEFault FORMat UNIT ENABle DEFault Default 1 Arguments 0 Disables the unit readout 1 Enables the unit readout Example FORM UNIT READ VOLT This command might return 567 n FORM UNIT 1 READ VOLT This command might return 567 V n 3 7 18 INPut COUPling Defines how the input signal is fed to the sense system Syntax INPut COUPling VREF DC GND DEFault INPut COUPling DEFault OPTions Default GND Arguments VREF The internal voltage reference associated with the current gain is fed to the sense system DC Selects a DC coupling GND Short circuits the input Example INP COUP DC Direct coupling of the input 3 7 19 INPut GAIN Defines which gain is used to amplify the input signal mi ETR olob 26 www metrolab com FDI2056 User s Manual v 20r 1 2 05 14 Copyright 2014 Metrolab Technology SA Syntax INPut GAIN MINimum MAXimum UP DOWN DEFault lt value gt INPut GAIN DEFault OPTions Default 0 1 Arguments
75. ring to be modified to contain one or more characters The EOD command parameters are decimal ASCII codes separated by commas Example Following the reception of the command EOD 69 109 112 116 121 13 10 the FDI2056 will reply Empty The maximum length for the End of Data string is 20 characters If the EOD command is executed without any parameters the default string Ctrl Z is assumed 4 11 7 Interrupting a measurement cycle BRK It may be necessary to stop the measurement cycle once it has begun This may be because of a programming error in the cycle itself or simply to restart a new cycle without waiting for the present one to end the RUN command being ignored during the measurement cycle To abort the measurement cycle the host should execute the BRK command This command is also used to stop measurements when external triggers are used TRS X In this case bit 3 of STATUS 1 End of Run is set Using the BRK command has the following effects e The measurement cycle is terminated e The motor if it is operational is stopped irrespective of the commands used to start it MOT MOT or MOT A e The external trigger input is disabled e All data measured up to the instant that the BRK was received are valid and can be read by the host The FDI2056 can also execute a BRK automatically if any of the following errors occurs m ETRO Joly 60 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright
76. rrence of an over range condition Not Break Over range will immediately stop the measurement in progress if any and set bit 4 of STATUS 1 to one NBO 1 By default when an over range condition occurs the measurement sequence is stopped This command disables the instrument s default reaction to an over range condition This command must be used with great care because it is not possible to determine when the over range condition occurred and for how long it lasted The wrong data are stored in the buffer as would be any valid data However bit 4 of STATUS 1 is set to one If an over range occurs during the measurement the returned value is 0 with an exclamation mark between the last digit and the channel descriptor e g O A ist This command allows the FDI2056 channel TeST or channels to be tested automatically Following this command the state prior to its execution is restored AUT Returns test measurements AUTo test The command sends the block of 5 measurements calculated during the Metrrolab 70 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA SYNTAX DESCRIPTION MNEMONIC automatic test performed following the power on sequence or following the TST command ISC i 0 Default Internal short circuit of channel i OFF Input Short Circ ISC i 1 Internal short circuit of channel i ON i A B or means both channels Note If i is omi
77. ry This difference in parameter storage is of capital importance because ADuJ i 3 is the only command which allows compensation parameters to be retained by the system after POWER OFF IND s s forward direction INDex backward direction If s is omitted the motor does not move This command allows the encoder position to be initialized The motor is driven in the selected direction until the index signal or an external synchronization pulse arrives then the trigger source counter is reset the motor is stopped and finally bit O of STATUS 1 is set Motor interface Please read section 4 3 We remind you that the FDI2056 doesn t incorporate a motor driver MOT s Starts the motor MOTor s starts the motor in the forward direction FW starts the motor in the backward direction BW MOT S Default stops the motor and cancels the MOTA MOTor Stop command MOT A Automatically starts the motor MOTor Automatic The motor starts automatically following MerTrrolab 66 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA SYNTAX DESCRIPTION MNEMONIC the RUN command The direction of rotation or displacement is defined by the TRI command When the sequence of measurements is completed the motor is stopped Note the MOT S command cancel MOT A WARNING The motor and encoder wiring must be such that MOT starts the motor in the forward direction an
78. safety fuse prevents the system from providing more than 0 750 Amps 6 Green Ground 7 Blue Error Input m ETRO Joly 5 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA 8 Violet Index 9 Grey Index The shell is connected to the chassis ground When using a single ended encoder all signals must be connected to the active high version of the signals A B Index When using differential signals you must use the various pairs provided which are then fed to a differential to single ended driver The output polarity of the driver follows the polarity of the active high signal Le if A goes high and A goes low the output of the driver will go high As stated in the table it is possible to change the voltage used to power the encoder A full step by step explanation describing this operations is available in the Getting Started Manual 2 3 COMMUNICATING WITH THE FDI2056 The FDI2056 communicates to any host computer using an Ethernet VXI compliant protocol by default or using a serial PDI 5025 protocol when configured as such 2 4 INITIAL POWER ON 1 After the FDI2056 is powered on the message INIT will be displayed on all installed channels This indicates that the FDI2056 is resetting Once powered on the FDI2056 takes several seconds before being able to communicate Please remember that you must respect a warm up time of at least 10 minutes before makin
79. st cumulative storage mode CUM 1 L is selected the instrument will behave as a fluxmeter To demonstrate the use of the TRI command some examples are given below TRI 500 4 15 10 2 1 100 CDe TRI 5 200 CDe equivalent to TRI 0 5 200 CR TRI 50 CDe this command will roughly move the motor to the specified position without performing any measurement The accuracy of the positioning is very low TRI 89 10 250 1000 CR p start at the absolute position of 89 then perform 10 sequences of 250 pulses then an infinite sequence of 1000 pulses 4 9 1 Trigger Source Timer The internally quartz controlled time base generator is set by default to operate at a frequency of 1 kHz and is used to feed the FDI2056 Trigger Factory The TRI command defines the integration intervals in terms of number of periods As the default frequency is 1 kHz you may consider this integration interval as the time spent for each partial integral expressed in milliseconds If you would like to proceed to a faster integration time change the default time base generator see section 1 The counter can be activated in two different ways a by the RUN command In this case the TRS command which will have to have been issued before must be TRS T mi ETR olab 47 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA b by the first external synchronization signal on the SYNC input
80. t cycle as if BRK had been received see section 4 11 7 Overlap timeout This error happens when the trigger rate is faster than the sampling rate This error will stop the current measurement cycle as if BRK had been received see section 4 11 7 Table 4 2 STATUS 2 Error Status STATUS 3 Trigger source 1 Byte Bits 75 TRS Mode 000 Offset adjustment ADJ 1 001 Timer without synchronization URSS me TROAL 53 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Ra 010 Timer with Synchronization TRS T S 011 Encoder without index nor synchronization TRS E 100 Encoder with external synchronization Linear with Index TRS E S 101 Rotating Encoder with index TRS E dddd 110 External Trigger TRS X 111 External Trigger with synchronization TRS X S Infinite sequence This bit is set to indicate that an infinite trigger sequence is in progress An infinite sequence is set using ni in the TRI command Measurement in progress This bit is set to indicate that the FDI2056 is in the process of measuring The bit is automatically set by the RUN command it is automatically cleared when the sequence is terminated Forwards Backwards A value of 1 indicates motion in the forward direction FW LED lit a value of 0 refers to the backward direction BW LED lit Note that when no encoder is in use this bit has no meaning Motor
81. t mounted mi ETRO ol 79 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA These modifications are to be performed only by professional electronics technicians Unprofessional workmanship may destroy your card and will void your warranty Metrolab will happily perform any necessary modifications for a nominal service fee and free of charge if you state your requirements at the time of ordering 5 4 ADDING A SUPPLEMENTARY INTEGRATOR CHANNEL The FDI2056 usually comes with one channel but can be equipped with up to three integrator channels on the standard Metrolab crate and up to nine integrator channels with the extended crate To install an FDI2056 integration card in the crate please follow the instructions bellow carefully The FDI2056 electronics supports hot swapping but the firmware will not start up correctly We recommend powering down the crate Handle the FDI2056 channel card with caution to avoid damage due to electrostatic discharge Ground yourself before handling the card the best procedure is to use a grounded wrist strap during installation The FDI2056 channel card has components on the underside that just barely clear the faceplate of adjacent cards Exercise extreme caution in order not to damage the card when you slide it into the crate Slide it in slowly and lift it slightly to keep the components from snagging m ETR olob
82. t panel Syntax DISPlay TEXT DATA lt string gt DISPlay TEXT DATA Arguments string Only the first four 4 ASCII characters will be displayed Each time the system needs to write on the display the user value is withdrawn Example DISP TEXT HELLO Displays HELLO on every instrument s display 3 7 13 FETCh ARRay Query only Fetches data values acquired during last READ or INITiate Syntax FETCh ARRay lt size gt lt digits gt Default digits 6 Arguments size The amount of data being fetched into the system digits The number of digits that must be returned to the user Example FETCh ARR 1023 6 Read 1023 values each having 6 digits Related commands mi ETRO lol 23 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA FORMat DATa FORMat TIMestamp ENABle FORMat READings ALL FORMat UNIT ENABle UNIT FLUX UNIT VOLTage UNIT TIMestamp 3 7 14 FORMat DATa Sets format for returned measured data Syntax FORMat DATa ASCii INTeger DEFault FORMat DATa DEFault OPTions Default ASCii Arguments ASCii INTeger User readable output Returns an IEEE488 2 definite length block The block starts with a sharp sign followed by a 1 digit number ranging from 1 to 9 This number specifies how many digits the number which follows contains Example 3123 means a number having 3 digits That number
83. t sequence will automatically follow when PDI 5025 emulation mode is entered During autotest no communications may be established with the host Thus any messages sent to the FDI2056 will be ignored 4 5 CHANNEL SELECTION The FDI2056 can be equipped with as many as nine channels the standard unit is equipped with a single channel All channels are always triggered in parallel Measurements can be performed on an individual channel or on all channels simultaneously The CHA command selects the active channel or channels If issued on a unit equipped with a single channel this command will generate a Command Error bit 5 of status 1 set to 1 4 6 GAIN SELECTION The gain of each channel can be independently set to any of the following values 1 2 5 10 20 40 50 100 It is selected by the host computer with the SGA Set GAin command Example SGA B 100 set gain to 100 on channel B mi ETRO lol 45 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA SGA 20 set gain to 20 on the active channel s We recommend that the gain be set in such a manner that the voltage displayed on the bargraph display is the highest possible without an over range being detected during the measurement cycle An over range condition is indicated by the OVR or OVR LEDs on the bargraph display 4 7 OFFSET ADJUSTMENT The instrument has the possibility of reducing the linear drift of the integrator
84. th external TRigger Source synchronization eXternal Synchro Note When executing the TRS command the previous TRI sequence is cancelled the motor is stopped and the MOT A becomes inactive me TROlab 64 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA SYNTAX DESCRIPTION MNEMONIC TRI s a n1 C1 n2 C2 n20 C20 TRigger sequence S The direction of displacement or a The absolute position of the start 1st trigger 231 to 231 4 ni The number of integration intervals of the i subsequence ni 1 to 65535 or ni the sign stands for infinity Ci The number of events received before the sending of a trigger to the integrator The integration intervals of the i sub sequence is given in number of input events 1 to 4095 The maximum number of sub sequences is 20 TRI 1 Default Note An integration interval is defined by two consecutive trigger signals The second signal also starts the next interval meaning that there is no dead time between each integration interval TRI Returns a string containing the current values of the sequence SGA i d d Sets the Gain of the module channel i Set GAin i A B or means both channels d d is the value of the Gain the leading zeroes can be omitted SGA 10 Default The default Gain at power on is 10 Note If the channel designation is omitted the Gain is set on the active channel or ch
85. the gain However you may force the system to use the value written in this register by forcing this bit to 1 This way you may take control over the voltage fed to the input resistor ladder Please note that this voltage is applied to the positive input of the resistor ladder and the same voltage but negative is applied to the negative input of the said resistor ladder Voltage reference value 0000 0001 0010 0011 0100 0101 0110 12 5 12 5 10 0 10 0 5 0 2 5 125 Metrrolab Volts Volts Volts Volts Volts Volts Volts 76 www metrolab com FDI2056 User s Manual Bit 1 0 0111 1000 1001 1010 1011 1100 1 0 Volts 0 5 Volts 0 25 Volts 0 125 Volts 0 1 Volts 0 05 Volts v2 0r1 2 05 14 Select the signal that is fed to the input 00 Direct coil connection 01 Input is short circuited 10 Voltage reference Copyright 2014 Metrolab Technology SA 11 Voltage reference External Trigger configuration BAR3 0x106 Bit 1 0 Active edge configuration 00 01 10 11 Disabled Rising edge Falling edge Both edges Bi Phase decoder configuration BAR3 0x107 Bit 7 6 Sync configuration Bit 5 Bit 4 Bit 3 0 Bi Phase encoder Index type Bi Phase input signal mode Bi Phase input signal configuration 00 01 10 11 Disabled Rising edge Falling edge Both edges When set to the
86. tion neither can it be negative The value of Cj is also limited to the number of pulses per encoder rotation The command MOT A starts the motor in the direction defined by the s in the TRI command immediately following the reception of the RUN command and stops the motor at the end of the measurement sequence Programming example of PDI 5025 with encoder and index TRS E 360 CF f Indicates a disk encoder with 360 cycles IND CR f per rotation with an index Turn the motor in the backwards direction BW until the index pulse is detected m ETR olob 48 www metrolab com FDI2056 User s Manual v2 0r1 2 05 14 Copyright 2014 Metrolab Technology SA TRI 140 8 10 3 1000 CDe Prepares a sequence of 11 measurements in the backward direction the first TRIGGER is at absolute position 140 pulses not cycles MOT A CR f Sets motor to automatic RUN CR Starts the motor perform the measurements then stop the motor 4 9 2 2 Linear Encoder with Index TRS E S This case is identical to the one above except for the following points e The absolute position can range from 2 to 2 on either side of the index point e The absolute position in the TRI programming sequence of the command can be negative 4 9 2 3 Linear or Rotational Encoder without Index but with External Synchronization TRS E S The external synchronization signal must be connected to the SYNC input It is used to define the zero pos
87. transfer IMD 0 and forces an immediate data transfer mode IMD 1 See section 4 11 which explains timing limitations Note It is not possible to change the storage mode during an active run IMD 1 Default Flux values can be read during the IMmeDiate measurement The flux values can be read before the sequence of measurements has been completed The values are read one by one If reading is performed before data is available the PDI 5025 returns CR LF When Data ready bit in STATUS 1 bit 2 is set it indicates that a new measurement value is available IMD O Flux values are read as a block at the end of the sequence of measurements and as soon as the microprocessor has completed the calculations The different values in the block are separated by a CR LF sequence When Data ready bit in STATUS 1 bit 2 is set it indicates that the block of data can be read Note This mode is incompatible with the CUM 1 L command K IMD i T Flux values with associated timestamps IMmedDiate with can be read during the measurement This Timestamps mode is the same as IMD 1 or IMD 0 but each measurement is followed by a comma and the associated timestamp ENQ This command allows data to be read in ENQuiry the manner specified by the IMD command Notes When the data buffer has been read and reset a new read request will make the instrument return either the default string CTRL Z or the one defined with the EOD comm
88. tted the command will be executed on the active channel or channels The ISC short circuits the input of the integrator channel f FNC Command no longer applicable FuNCtion will be ignored by the system Lo Command no longer applicable Local LOckout will be ignored by the system K MSK Command no longer applicable MaSK IEEE488 specific generates a command error SYN Generate synchronization SYNchronization Note the SYN command can be executed only if the trigger source has been previously defined with a synchronization pulse TRS T S or TRS E S or TRS X S The software synchronization replaces the hardware synchronization which can be fed into the appropriate SYNC input of the Trigger Factory zz EMU V Returns the current version of the PDI a emulator K EMU P Turns the system off As soon as it is safe to operate the power switch to off state you will be prompted on the display with the text Om f EMU L Leave the emulator and enters in the VXI communication mode The RS232 communication will be lost to the benefit of this Ethernet protocol f EMU F Set the boot mode to VXI FDI mode The next time you turn the system on the instrument will enter the VXI communication mode This command does not require you to leave the PDI mode Metrrolab 71 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA REFERENCE 5 Technical Details 5 1
89. u may either Proceed to a full compensation by sending the ADJ 2 command which will perform the measurements needed and update the user compensation parameters or Restore the factory compensation parameters by sending the ADJ 3 command which will proceed to the replacement of the user compensation parameters with those generated during the integrator channel production If the problem persists after one of these corrective operation attempts please contact us K IMEM The internal system memory is corrupt This is a major issue please contact us mi ETR olab 61 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA K IINP The analog input circuitry doesn t perform as it should This is a major issue please contact us f IRNG The over range detection mechanism does not perform as expected This is a major issue please contact us K IHWU A firmware upgrade including FPGA reconfiguration is needed The user may obtain detailed information on the problems encountered during the autotest by examining status registers STATUS 5 and STATUS 6 The autotest may also be executed by the host computer by issuing a TST command The command AUT allows the host computer to access the values measured by the autotest The instrument transfers this data in one block in a format similar to that shown below To be defined 4 11 10 Offset compensation ISC ADJ To adjust the
90. up space in the internal data buffer To read the next value the host computer must send the ENQ command The returned value is expressed in 10 8 Vs followed by a space and then the channel identifier e g 45982900 A If an over range occurs during the measurement with the command NBO 1 having been previously sent to the instrument the returned value is O with an exclamation mark between the last digit and the channel descriptor e g O A To read the next value the host must send the ENQ command If two channels are active then Channel B is sent before Channel A If the values are read during a measurement cycle and the ENQ command is performed before the next data value is available i e Data Ready not yet set then the instrument will return the characters carriage return and line feed CR LF This corresponds to a null string When all the values have been read by the host computer and the internal buffer is empty the instrument will reply to a request for more data with the End Of Data string which by default is set to Ctrl Z ASCII 26 This string may be programmed by the user see section 4 11 6 4 11 5 Block Data Transfer IMD 0 This mode allows the internal data buffer to be emptied in one single block transfer Therefore it is not possible to obtain data whilst the measurement is in progress the host computer must wait until all the data have been taken and converted As soon as the last value has be
91. ve and Negative Transition Register set Event Registers are cleared when read Event Enable Register ENABle This is a mask indicating what bits in the Event Register are included in the Summary bit The enable mask of the Status Byte is called the Status Enable register and it determines which bits cause an RQS ReQuest for Service Note that some Condition Register bits signal permanent conditions for example Power On and others signal transient events for example Command Error Reading a Condition Register will provide no indication of transient events only the corresponding Event Register will record such events Also note that for efficiency reasons status register updates are deferred to the extent possible and are normally performed only at the end of each sequence of commands separated by semicolons This also means that a ReQuest for Service RQS is normally generated only at the end of such a sequence There are exceptions to this deferral rule for example if the command sequence includes a status query command mi ETR olob 13 www metrolab com gt 4 gt Summary To upper hierarchy FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA 3 4 IEEE 488 2 CONTROLS The following low level functions are defined by the VXI 11 protocol Excluded are the functions that are fundamental to the operation e g in VXI 11 create_link destroy_link device_write device_read create
92. ve over range This bit reports the instantaneous positive over range status When the positive over range LED on the bargraph display of the channel is lit this bit is set VFC Type These bits show if channel is active The reported Voltage To Frequency type depends on the value set during the configuration Please read section 4 2 00 Channel A is inactive 01 VFC 100 kHz 10 VFC 500 kHz 11 VFC 1 MHz Negative over range This bit reports the instantaneous negative over range status 55 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA When the negative over range LED on the bargraph display of the channel is lit this bit is set Bit 0 Positive over range This bit reports the instantaneous positive over range status When the positive over range LED on the bargraph display of the channel is lit this bit is set Table 4 4 STATUS 4 Integrator Module STATUS 5 STATUS6 Autotest 1 Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 STATUS 5 relates to Channel A or C E G l while STATUS 6 refers to Channel B or D F H If only one integrator channel is placed in the instrument the status bits of the missing channel are always zero Access to Integrator Channel Status for Channel C to are accessed using the CHA command This bit is always read as 0 This bit is always read as 0 This bit is always read as 0 Error in analog measurement Th
93. which follows the RUN command issued by the host All following signals on the SYNC input will be ignored In this case the TRS command must be TRS T S 4 9 2 Trigger Source Bi Phase Encoder The Bi Phase decoder module located on slot 2 of the instrument has been designed to accept the signals generated by linear or rotational incremental encoders These signals are formated and filtered before being fed to the Trigger Factory with 4 pulses representing 1 encoder cycle multiplication by 4 The TRS E command will depend on the type of encoder used 4 9 2 1 Rotational Encoder with Index TRS E dddd Field dddd expresses in decimals the number of cycles per rotation We remind you that since the decoder tracks the number of edge by cycle for an encoder with 360 cycles TRS E 360 you will actually end up with 1440 pulses per rotation The use of the index pulse allows the measurements to be made absolute in relation to a fixed point The index point must be passed at least once to initialize the measurement sequence This may be done manually or by using the IND command which will turn the motor in the indicated direction until the index pulse is detected This point is taken as a reference and therefore all measurements are absolute to it and are verified on each successive index pulse It follows from the above that the absolute value given in a TRI command cannot be greater than the number of pulses per encoder rota
94. y SA GETTING STARTED 2 Installation Guide This chapter provides information regarding the various connections available on the instrument and other internal configurations available to the user 2 1 FDI 2056 HOST INTERFACE PANEL AND CONNECTIONS The DVI Digital Visual Interface is used to connect the host interface to a display device such as a computer monitor The USB host interface is used to connect devices such as a keyboard a mouse etc Ethernet connectors Connector number 2 must be used to connect the instrument to your host computer using a crossover cable or a straight cable to a switch or a hub The two LEDs signal the following information Top LED Bottom LED Off No link Off No Link Orange 1 Gb Link Green blinking activity Green 100 Mb Link Three LEDs are present on the interface front panel e The LED named PG Power Good is green when the system s power is functioning as expected When off the system is sleeping When the color of this LED turns to steady red or blinking continuously it indicates a major failure e The GP LED is not dedicated to any particular hardware or firmware function Nevertheless a red blinking GP LED indicates a major failure mi ETR olob 3 www metrolab com FDI2056 User s Manual v 2 0 r 1 2 05 14 Copyright 2014 Metrolab Technology SA e The LED named HD Hard Drive blinks each time an access is made to the internal hard driv

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