CONTROL, MONITOREO Y ALMACENAMIENTO MEDIANTE CONTROL, MONITOREO Y ALMACENAMIENTO MEDIANTE LABVIEWLABVIEWTMTM DE DE VARIABLES DE INTERES PROVENIENTES DE LOS INSTRUMENTOS DE MEDICION:VARIABLES DE INTERES PROVENIENTES DE LOS INSTRUMENTOS DE MEDICION:

COMMUNICATIONS PERFORMANCE ANALYZER HEWLETT PACKARD OMNIBER 37717C COMMUNICATIONS PERFORMANCE ANALYZER HEWLETT PACKARD OMNIBER 37717C DIGITIZING OSCILLOSCOPE TEKTRONIK TDS520ADIGITIZING OSCILLOSCOPE TEKTRONIK TDS520A

Luis Aguilar (UNEXPO)

luishaguilar@esmartweb.com

Alejandro Martinez (PDVSA)

martinezaae@pdvsa.com

1. STANDARD GPIB

2. INSTRUMENTACIÓN VIRTUAL

3. CONTROL DE INSTRUMENTOS

4. PRESENTACIÓN DE CASO REAL

Hewlett-Packard developed a bus to connect and control theirprogrammable instruments.But the need arose for a standard, high-speed interface so thatinstruments and controllers from various vendors could communicate.

IEEE Society published ANSI/IEEE Standard 488 - 1975,IEEE Standard Digital Interface for Programmable Instrumentation• Electrical, mechanical, and functional specifications• Bus is known by the names GPIB, HP-IB, and IEEE 488 bus

The original IEEE 488 - 1975 document was revised for editorialclarification and addendum.

IEEE 488.2, Codes, Formats, Protocols, and Common Commands• Enhances system compatibility and configurability• Builds upon IEEE 488.1, but does not replace it

Standard Commands for Programmable Instrumentation (SCPI)• Specific command set for each instrument class• Instrument interchangeability

Late 1960s

1975

1978

1987

1990

Bandwidth

Max. number of devices

Max. cable length

Connectors

Termination

Compatibility across

platforms

Bus connectivity

1-8 Mbytes/s 2-5 Mbytes/s <20 kbytes/s

14

20 m

Standard

Built-in

Yes

Linear or

Star

7

6 m

Nonstandard

Required

No

Linear

1

15 m

Nonstandard

No

Not needed

N/A

GPIB SCSI

<20 kbytes/s

No

Linear

Required

Nonstandard

1220 m

32

RS-232 RS-485

• Eight data lines

• Five interface management lines

• Three handshake lines

123456789

101112

131415161718192021222324

DIO5

DIO6DIO7DIO8RENGND (TW PAIR W/DAV)GND (TW PAIR W/NRFD)GND (TW PAIR W/NDAC)GND (TW PAIR W/IFC)GND (TW PAIR W/SRQ)GND (TW PAIR W/ATN)SIGNAL GROUND

DIO1DIO2DIO3DIO4EOI

DAVNRFDNDAC

IFCSRQATN

SHIELD

• Maximum separation of 4 m between any two devices and an average separation of 2 m over the entire bus.

• Maximum cable length of 20 m.

• Maximum of 15 devices connected to each bus, with at least two-thirds of the devices powered on.

• You can use National Instruments GPIB extenders and expanders to exceed these limits.

• Only one Controller-In-Charge on the GPIB at a time

• Primary responsibilities of a Controller are:

– Defining the communication links

– Responding to devices requesting service

– Sending GPIB commands

– Passing/receiving control

• Talkers

– Are instructed by the Controller to talk

– Place data on the GPIB

– Only one device is permitted at a time by the Controller to talk

• Listeners

– Are instructed by the Controller to listen

– Read data that the Talker places on the GPIB

– Several devices are permitted by the Controller to be Listeners at the same time

• The GPIB features different configurations for connecting devices.

• The GPIB consists of eight data lines (with grounds), five bus management lines, and three handshaking lines.

• There is always one bus Controller that dictates all bus activity. The Controller sets up devices as Talkers and Listeners.

• There are command and data messages on the GPIB. Command messages are for bus-specific commands, whereas data messages contain only data.

• Every device on the GPIB has a primary GPIB address that the Controller uses to control which devices send or receive data.

• There are three methods for terminating communication on the GPIB – EOI, EOS, count, or any combination of the three.

PC Based Virtual Instrumentation has become the new PC Based Virtual Instrumentation has become the new methodology for instrumentationmethodology for instrumentation

PC

TV

Radio

Clock

Time

Fle

xibi

lity

0

50100

25 75

DISPLAY AND

CONTROL

Stand Alone Instrument PC Based Instrument

Vendor Defined User Defined

AcquisitionAcquisition PresentationPresentationAnalysisAnalysis

Signal Routing and Conditioning

INSTRUMENT

DAQ Boards

IEEE488 (GPIB)

VXI

RS-232

Trigger Control

Format

Calculate

User Interface

Hard Copy

File I/O

Interprocess Communication

Networking

• Industry-standard components

• Flexible

• Scalable

• Connectivity

• Compatibility

• Increased productivity

• Reduced cost

• Graphical Programming for Virtual Instrumentation

– front panel graphical userinterfaces

– graphical block diagram source code

– compiler for optimized execution

• Standalone executables for easy distribution

September 1992

LabVIEW for WindowsLabVIEW for Sun

April 1990

U.S. Patent

February 1990

U.S. PatentJanuary 1990

LabVIEW 2

October 1986

LabVIEW 1

April 1983LabVIEW Concept

•1998 - LabVIEW 5• – Multithreading, VI Server, ActiveX, Undo, Wizards•1996 - LabVIEW 4• – Customizable interface

•1994 - LabVIEW 3• – LabVIEW for HP-UX• – Add-On Toolkits

•1992 - New operating systems• – Microsoft Windows, OpenWindows, X Windows• – Introduction on other platforms

•1990 - LabVIEW 2• – Mature product -- four years of customer feedback• – Compiler to match industry needs

•1986 - LabVIEW 1• – Introduced innovative approach to programming• – Macintosh only possible platform

•1983 - LabVIEW concept• – Search for instrumentation software solution• – Virtual instrument concept

1998

LabVIEW for HP-UXAdd-On Toolkits

1994

LabVIEW 5

1996

LabVIEW 4

• Platform neutral• Leverage common

technology• Migrate applications

between platforms• Also available on

Concurrent PowerMAX

S C X I1 1 4 0

S C X I1 1 4 0

S C X I

1 1 4 0

S C X I1 1 4 0

SCXI - 1001

M A IN FR A M E

SCXI

SCX I1 1 0 0

NAT IONAL

INS T RUMENT S®

bu

s

Control P anel

Flow

P ressure A larm Conditions

S TOP

Temperature

LabVIEWSoftwareAnalysis and Presentation

LabVIEWSoftwareAnalysis and Presentation

Hardware and Driver SoftwareAcquisition and ControlHardware and Driver SoftwareAcquisition and Control

GPIB Instruments

Serial Instruments

DAQ Products

Unit Under Test

Process

VXI Instruments

PC or Workstation

Other networked computers

Acquisition

IEEE 488.2controllers

Plug-in dataacquisition boards

VXI controllers

Software for RS-232 instruments

Analysis

Signal generation

Digital filters

Smoothing windows

Statistics

DSP hardware

Presentation

GUI

Strip charts

Graphs

Hardcopy

File I/O

LabVIEW, LabWindows/CVI, and ComponentWorksLabVIEW, LabWindows/CVI, and ComponentWorks

HiQ (Post analysis and report generation)

• Create and analyze Tributary PDH rates• Ability to Map PDH into SDH• Check correct channel assignment in TU

groups• Ability to Demap PDH out of SDH• Transmit and Receive PDH rates

• Affordable– Does all SDH installation & maintenance tests

• Watch for hidden future costs (Upgrade vs Overhaul)• Ease of Use

– Includes productivity features that simplify operation• AutoScan• Pass/Fail Test • TroubleScan• Graphical Measurement Histograms

• Configurability– Allow additional capabilities when needed

• Standard tributaries (2Mb, ...)• New tributaries (ATM, ...)• Other capabilities (Jitter, ...)

• Remote Control– Serial– GPIB– Ethernet

• Automated/Network Control

• Data Analysis• Data Storage

• Leveraging computer technology– Adaptability– Latest technology

• Creating open systems– Freedom of choice– Integration

• Delivering true productivity– Flexibility– Performance

• Empowering technology– Natural design notation– Eliminates syntactical details

• Reduced development time– Readability– Self-documenting

• Reusability– Modularity– Top-down and

bottom-up design

Top-Level Front Panel

Top-Level Block Diagram

Low-Level Panel

Low-Level Diagram

• Pure graphical programming– Robustness– Consistent methodology

• Programming structures– Intuitive– Scalable

• Compiled language– Performance– Executables

CEstablished Programming StandardWidespread Knowledge Base Instrumentation LibrariesStandard Coding ConventionsSource Code Control

Intuitive GUIDynamic-Link-Libraries (DLLs)Dynamic-Data-Exchange (DDE)Extended MemoryCommon ResourcesNetworking

Interactive Development

Tools

Standard ANSI C

Programming

GUIs

Instrument Drivers

DAQ

Networking

GPIB VXISerial

Analysis

• CD-ROM from Instrument Library Developer Program

• Internet/WWW–ftp@ni.com–www.ni.com

• Contact National Instruments office

•Sophisticated, Direct Sales/Support•U.S. – more than 30 offices covering all 50 statesInternational – more than 25 offices•Manufacturing/R&D•Austin, TX Corporate Headquarters•Employees•U.S. – more than 800 employeesInternational – more than 200 employees•Extensive Product Lines•More than 600 products

TEKTRONIK DIGITIZING OSCILLOSCOPE

TDS520A

HEWLETT PACKARD COMMUNICATIONS

PERFORMANCE ANALYZER OMNIBER 37717C

LAPTOP COMPAQ ARMADA M700

TARJETA Y CABLE NATIONAL INSTRUMENTS

PCMCIA-GPIB

HEWLETT PACKARD GPIB CABLE 10833A

HEWLETT PACKARD FUNCTION GENERATOR

3312A

LABVIEW 7.0

MEASUREMENT & AUTOMATION EXPLORER 3.0.2

NI 488.2 1.70

NI VISA 3.0.1

DRIVERS Y LIBRERIAS DE LOS INSTRUMENTOS

•SDH/SONET/PDH/ATM/Jitter Test Set Platform

•Opts: USS, A3B, UKN, UKJ, A3K, A3N, 130,120, UH4

•Dual SONET/SDH Interfaces

•Dual 1310, 1550 nm Optics Installed

•HPIB, RS232, LAN, Parallel Interfaces

Agilent's OmniBER 717 communications performance analyzer offers a single-box, field-portable multi-rate tester to 622Mb/s for installation, maintenance, and commissioning of hybrid PDH/SDH/SONET and ATM transport networks and network equipment.

OmniBER 717 can be configured as a dual standard SONET/SDH analyzer for BER and jitter tests, which makes it the ideal tool for testing network equipment in a manufacturing environment. The dual SONET/SDH capability along with comprehensive remote control of the instruments rich feature set means that production lines can be rapidly reconfigured to test either SONET or SDH.

HP 37717C OmniBER 717 Communications

Performance Analyzer

•500 MHz maximum analog bandwidth.

•1 Gigasample/second maximum digitizing rate

•500 Megasamples/second maximum digitizing rate

•Four-channel acquisition, two full-featured channels and two channels with limited vertical scale selections: 100 mV, 1 V, and 10 V.

•Waveform Math — Invert a single waveform and add, subtract, multiply, and divide two waveforms.

•Up to 15,000-point record length per channel (50,000-point optional).

•Full GPIB software programmability. Hardcopy output using RS-232 or Centronics ports

Tektronik TDS 520A Digitizing Oscilloscope

APLICACIÓN DE LABVIEW PARA EL CONTROL,

MONITOREO Y ALMACENAMIENTO

OMNIBER 37717C

TDS 520A

37717C Driver:

VXIplug&play A.07.00

37717C LabView Driver

DESCARGA E INSTALACION DE LOS SIGUIENTES DRIVERS:

DIRECCIONAMIENTO GPIB EN CADA INSTRUMENTO

CONEXIÓN EN CASCADA DE LOS INSTRUMENTOS

PCMCIA-GPIB CABLE

GPIB CABLE

VXI PLUG & PLAY Y LABVIEW DRIVERS

PRUEBAS DE COMUNICACIÓN CON LOS INSTRUMENTOS

GPIB

DRIVERSPROGRAMACION EN

LABVIEW

DISEÑO GRAFICO DE PANEL FRONTAL

APLICACIÓN EN LABVIEW PARA EL

CONTROL Y MONITOREO DEL

INSTRUMENTO

1

2

3

4

5 6

7 8

1. Mostrar las formas de onda por pantalla

2. Mostrar tipos de mediciones

3. Selección de medición a realizar

4. Selección del canal

5. Variación de escala vertical

6. Variación de escala horizontal

7. Variación de posición vertical

8. Variación de posición horizontal

1

2

3

4

5

6

78

9

10

1112

13

14

1. Restricciones de acceso al programa y sus funciones mediante password

2. Auto setup del instrumento (lo habilita para trabajar en modo remoto)

3. Comienzo y/o finalización de la medición

4. Selección de señal de transmisión y recepción

5. Tipos de señales

6. Muestra la función de “Activar Alarmas”

7. Muestra la alarma “LOS”

8. Genera una alarma del tipo “LOS”

9. Muestra los resultados de las mediciones en pantalla

10. Muestra un histórico con posibles alarmas anteriores

11. Imprime un reporte con los resultados y también crea y guarda un documento en Excel con los mismos

12. Deshabilita el modo remoto

13. Genera un error sencillo

14. Leds indicadores de alarmas