Metrol FDI 2056 User manual

Magnetic precision has a name

Fast Digital Integrator

FDI 2056

User's Manual

Version 2.0

(Revision 1.1)

March 2013

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REVISION HISTORY

v. 1.0 r. 1.0

June 2010

First release

v. 1.0 r. 1.1

June 2010

Update installation procedure

Improve readability of screen-shots

Correct section numbering in Chapter 4

Correct formatting of specifications table

v. 1.1 r. 1.0

June 2010

Update for version 1.1 software

v. 1.1 r. 1.1

July 2010

Clarify Windows installation procedure

v. 1.1 r. 1.2

April 2011

Document Reset register

v. 2.0 r. 1.0

April 2012

Update for version 2.0 hardware and software

v. 2.0 r. 1.1

March 2013

SCPI commands added

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iii

CONTENTS

GETTING STARTED ................................................................................................1

1- Introduction.......................................................................................................1

GETTING STARTED ................................................................................................3

2- Installation Guide..............................................................................................3

2-1 FDI 2056 Host Interface panel and connections .....................................................................................3

2-2 FDI 2056 front panel and connections ....................................................................................................4

Description of the encoder input Micro-D connector....................................................................52-2-1

2-3 Communicating with the FDI 2056..........................................................................................................6

2-4 Initial power-on........................................................................................................................................ 6

2-5 Software Development............................................................................................................................7

PROGRAMMING THE FDI 2056 ..............................................................................8

3- VXI & SCPI standard interfaces.......................................................................8

3-1 Host Interface..........................................................................................................................................8

3-2 SCPI instrument model...........................................................................................................................8

3-3 IEEE 488.2 / SCPI status registers ....................................................................................................... 10

Status Byte ................................................................................................................................103-3-1 Standard Event Status Register.................................................................................................113-3-2 QUEStionable Status.................................................................................................................113-3-3 OPERation Status...................................................................................................................... 113-3-4 OPERation:PARarameters ........................................................................................................123-3-5

3-4 IEEE 488.2 controls ..............................................................................................................................14

3-5 IEEE 488.2 common commands........................................................................................................... 14

3-6 SCPI command syntax..........................................................................................................................15

3-7 SCPI command description................................................................................................................... 16

:ABORT (Event).........................................................................................................................173-7-1 :ARM#[:SEQuence][:LAYER]:SOURce......................................................................................173-7-2 :ARM#[:SEQuence][:LAYER]:ENCoder..................................................................................... 183-7-3 :ARM#[:SEQuence][:LAYER]:SYNChro[:SLOPe] ......................................................................183-7-4 :ARM#[:SEQuence][:LAYER]:EXTernal[:SLOPe] ......................................................................193-7-5 :CALCulate#:FLUX[:CUMulative]...............................................................................................193-7-6 :CALCulate#:TIMestamp[:CUMulative] ......................................................................................203-7-7 :CONTRol#:ENCoder:CONFigure..............................................................................................213-7-8 :CONTRol#:ENCoder[:POSition] ...............................................................................................223-7-9 :DATA#:COUNt? (Query only)...................................................................................................223-7-10 :DIAGnostic:UPGRade:[INITiate] (Event) .................................................................................233-7-11 :DISPlay#:TEXT[:DATA]............................................................................................................233-7-12 :FETCh#:ARRay? (Query only).................................................................................................233-7-13 :FORMat#[:DATa]......................................................................................................................243-7-14 :FORMat:TIMestamp[:ENABle]..................................................................................................253-7-15 :FORMat:READings:ALL ...........................................................................................................253-7-16 :FORMat:UNIT[:ENABle] ...........................................................................................................263-7-17 :INPut#:COUPling......................................................................................................................263-7-18 :INPut#:GAIN.............................................................................................................................263-7-19 :MEASure#[:SCALar]:VOLTage? (Query only).........................................................................273-7-20 :MEMory :STORe[:STATe] (Event)............................................................................................ 283-7-21 :MEMory :DELete (Event)..........................................................................................................283-7-22 :READ#:ARRay? (Query only)..................................................................................................283-7-23 :SENSe#:CORRection:ALL[:ACQuire] (Event) ......................................................................... 293-7-24 :SENSe#:CORRection:ZERo[:ACQuire] (Event).......................................................................293-7-25 :SENSe#:CORRection:SLOPe[:ACQuire] (Event) .....................................................................303-7-26

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:SENSe#:SAMPler[:RATe]......................................................................................................... 303-7-27 :SENSe#:FUNCTion.................................................................................................................. 303-7-28 :SYSTem:HELP:HEADers? (Query only)...................................................................................313-7-29 :SYSTem:HELP:SYNTax? (Query only)................................................................................... 313-7-30 :SYSTem:CHAnnel#:CDATe? (Query only)..............................................................................313-7-31 :SYSTem:CHAnnel#:MDATe? (Query only) .............................................................................313-7-32 :SYSTem:CHAnnel#:HWVERsion? (Query only)...................................................................... 323-7-33 :SYSTem:CHAnnel#:SERial? (Query only)............................................................................... 323-7-34 :SYSTem:FWVERsion? (Query only) .......................................................................................323-7-35 :SYSTem:LANGuage.................................................................................................................323-7-36 :SYSTem:SERial? (Query only)................................................................................................333-7-37 :SYSTem:POWER.....................................................................................................................333-7-38 :SYSTem:PRESet (Event)........................................................................................................333-7-39 :SYSTem:CHAnnel[:COUNt]? (Query only)...............................................................................333-7-40 :TRIGger#[:SEQuence]:SOURce............................................................................................... 343-7-41 :TRIGger#[:SEQuence]:COUNt .................................................................................................353-7-42 :TRIGger#[:SEQuence]:ECOUNt...............................................................................................353-7-43 :TRIGGER#[:SEQuence]:EXTernal[:SLOPe]............................................................................. 353-7-44 :TRIGGER#[:SEQuence]:ENCoder[:DIRection].........................................................................363-7-45 :TRIGger#[:SEQuence]:TIMer[:RATe] ....................................................................................... 363-7-46

3-8 Programming hints................................................................................................................................37

USING THE PDI EMULATION MODE....................................................................40

4- Software interface...........................................................................................40

4-1 Compatibilities issues............................................................................................................................40

4-2 Configuration.........................................................................................................................................41

4-3 Motor Software Interface.......................................................................................................................44

4-4 Power On Sequence.............................................................................................................................45

4-5 Channel Selection................................................................................................................................. 45

4-6 Gain Selection.......................................................................................................................................45

4-7 Offset adjustment.................................................................................................................................. 46

4-8 Integrator Mode.....................................................................................................................................46

4-9 Programming The Integration Intervals.................................................................................................46

Trigger Source: Timer................................................................................................................474-9-1 Trigger Source: Bi-Phase Encoder............................................................................................ 484-9-2 Trigger Source: External............................................................................................................494-9-3

4-10 The PDI 5025 Status Registers............................................................................................................. 51

4-11 Data Acquisition....................................................................................................................................58

Individual data storage (CUM,0) ................................................................................................584-11-1 Cumulative data storage (CUM,1,S)..........................................................................................584-11-2 Last cumulative data storage (CUM,1,L)....................................................................................584-11-3 Direct Data Transfer (IMD,1)...................................................................................................... 594-11-4 Block Data Transfer (IMD,0) ......................................................................................................594-11-5 End of Data (EOD).....................................................................................................................604-11-6 Interrupting a measurement cycle (BRK)...................................................................................604-11-7 Automatic Use of a Motor (MOT,A)............................................................................................614-11-8 Autotest (TST and AUT) ............................................................................................................614-11-9 Offset compensation (ISC, ADJ)................................................................................................ 624-11-10 Synchronization by the Host Computer (SYN)...........................................................................624-11-11

4-12 PDI 5025 Emulated COMMANDS.........................................................................................................63

REFERENCE..........................................................................................................72

5- Technical Details.............................................................................................72

5-1 Digitizer performance............................................................................................................................72

5-2 Integrator channel registers description................................................................................................ 72

5-3 Input adaptation ....................................................................................................................................79

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5-4 Adding a supplementary integrator channel.......................................................................................... 79

5-5 Warranty, Calibration, Certification and Maintenance...........................................................................82

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GETTING STARTED

Introduction

The Fast Digital Integrator FDI 2056 is a high precision, high-speed voltage

integrator, developed at the European Organization for Nuclear Research

(CERN). Combined with an appropriate flux coil, the FDI 2056 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 FDI 2056 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 FDI 2056 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 National 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 FDI 2056, especially in LabVIEW,

using Metrolab’s FDI 2056 Application Programming Interface (API).

Finally, keep your FDI 2056 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.

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We hope the FDI 2056 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 [email protected].

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GETTING STARTED

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.

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.

The GP LED is not dedicated to any particular hardware or firmware

function. Nevertheless, a red blinking GP LED indicates a major failure.

The LED named HD (Hard Drive) blinks each time an access is made to

the internal hard drive or more generally, when any access is made to the

SATA port.

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2-2 FDI 2056 FRONT PANEL AND CONNECTIONS

The 4-character display indicates the FDI 2056’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 FDI 2056 either via the two LEMO

00 connectors, “IN+” and “IN-“, or via the single LEMO 0B

connector.

The FDI 2056 is supplied with a 10 m cable with a LEMO 0B

connector. The FDI 2056 coil input characteristics can be adapted

for your application.

See Section 5-2 for details.

The “REF. CLK 20MHz” allows the FDI 2056 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.

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

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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.

CAUTION

The FDI 2056 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.

Description of the encoder input Micro-D connector.2-2-1

The FDI 2056 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

Black

Brown

Red

Orange

Yellow

5 [Volts] or 3.3 [Volts] (Factory default 5 [Volts])

A re-armable safety fuse prevents the system from

providing more than 0.750 [Amps].

Green

Ground

Blue

Error Input

Violet

Index

Grey

Index

The shell is connected to the chassis ground.

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