Manuale d’uso / di manutenzione del prodotto NI PCI-8254R del fabbricante National Instruments
Vai alla pagina of 45
NI Vision NI PCI-8254R User Manual 1394a Image Acquisition Device with Reconfigurable I/O NI PCI-8254R User Manual September 2006 371578C-01.
Support Worldwide Technical Support and Product Info rmation ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Aust in, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide O.
Important Information Warranty The NI PCI-8 254R is warra nted agai nst defec ts in mat erials a nd workmanship for a period of one year from the date of shipm ent, as evidenced by receipts or other documentati on. National Instruments wil l, at its option, repair or replace equipment that proves to be defect ive during the warranty period.
Compliance Compliance with FCC/Canada Radio Frequency Interference Regulations Determining FCC Class The Federal Communications Commission (FCC) has rules to protect wireless co mmunications from inte rference. The FCC places digital electronics into two classes.
Conventions The follo wing con ventions are used in this manual: » The » symbol leads you through nested menu items and dialog box options to a final action. The sequence File»Page Setup»Options directs yo u to pull down the File menu, select the Page Setup item, and select Options from the last dialog box.
© National Instruments Corporation vii NI PCI-8254R User Manual Contents Chapter 1 Introduction Software Overview ......... .............. ............... .............. .............. .............. .............. .......... 1-1 Vision Builder for Automated Inspection .
Contents NI PCI-8254R User Manual viii ni.com Chapter 3 Signal Connections Connectors ....... .............. .............. .............. .............. .............. .............. .............. ............ 3-2 2-Position Isolated Outputs Po wer Con nect or .
© National Instruments Corporation 1-1 NI PCI-8254R User Manual 1 Introduction The National Instruments PCI-8254R is an IEEE 1394a interface device for PCI with reconfig urable I/O (RIO). The NI 8254R is OHCI compliant and should be used with IEEE 1394a devices that run natively in Windows 2000/X P.
Chapter 1 Introduction NI PCI-8254R User Manual 1- 2 ni.com National Instruments also offers the following application software packages for analyzing and processing your acquired images. For detailed information about individual software packages, refer to the documentation specific to each package.
Chapter 1 Introduction © National Instruments Corporation 1-3 NI PCI-8254R User Manual V ision Assistant generates a Builder file, which is a text description containing a recipe of the machine vi sion and image processing fun ctions.
Chapter 1 Introduction NI PCI-8254R User Manual 1- 4 ni.com Figure 1-1. NI 8254R Block Diagram Start Conditions The NI 8254R can start acquisitions in the following ways: • So ft w are c on tro l —The NI 8254R supports software control of acquisition start.
© National Instruments Corporation 2-1 NI PCI-8254R User Manual 2 Digital I/O The digital I/O functions on the NI 8254R are accessible through 2 TTL inputs, 10 TTL output s, 13 isolated inputs, an d 4 isolat ed outputs. Y ou can use input signals as triggers, product selection ports, change detectors, or to read quadrature encoders.
Chapter 2 Digital I/O NI PCI-8254R User Manual 2- 2 ni.com NI-IMA Q I/O devices such as the such as the NI 8254R, the NI 8255R, and the CVS-1450 Series Co mpact V ision Systems have 29 digital I/O lin.
Chapter 2 Digita l I/O © National Instruments Corporation 2-3 NI PCI-8254R User Manual Isolated Inputs and Outputs The isolated inputs and outputs on the NI 8254R have a separate ground reference from the main NI 8254R device su pply, providing an easy means to prevent ground loops that can intr oduce noise into a system.
Chapter 2 Digital I/O NI PCI-8254R User Manual 2- 4 ni.com T able 2-2 summarizes the isolated inputs and out put s av ailable on the NI 8254R. I/O for Normal Operation The following sections describe I/O functions that are available on the NI 8254R during normal operation.
Chapter 2 Digita l I/O © National Instruments Corporation 2-5 NI PCI-8254R User Manual T rigger Inputs Trigger inputs are available from bot h TTL inputs and isolated inputs.
Chapter 2 Digital I/O NI PCI-8254R User Manual 2- 6 ni.com When the pulse generator is configured for a particular trigger input, after generating a p ulse, it waits for ano t her trigger before generating anot her pulse.
Chapter 2 Digita l I/O © National Instruments Corporation 2-7 NI PCI-8254R User Manual Pulse Width Pulse width is t he amount of tim e be tween the first (assertion) edge of a pulse and the second (deassertion) edge. Pulse width is config urab le only in microseconds from 1 µs to 4,294,967 ,29 5 µs.
Chapter 2 Digital I/O NI PCI-8254R User Manual 2- 8 ni.com T rigger Change Detectors The NI 8254R is capable of detecting edges on various trigger lin es and latching this inf ormation for future retrieval. Th is feature is useful for high-precision hardware-monitoring of the presence of external events without the need for software po lli ng.
Chapter 2 Digita l I/O © National Instruments Corporation 2-9 NI PCI-8254R User Manual example, an upstream NI 8254R device programmed for part classification might driv e the product selection port of a downstream NI 8254R device.
Chapter 2 Digital I/O NI PCI-8254R User Manual 2-10 ni.com An example of ho w to use general-purpose inputs is reading the status of a general-purpose input as the first st ep in your inspection sequence and recording that value as part of your inspection.
Chapter 2 Digita l I/O © National Instruments Corporation 2-11 NI PCI-8254R User Manual Shutdown Shutdown mode is a so ftware-enabled feature that, when activated, allows an external device to halt the NI 8254R device processing operations. Additionally, Shutdown mode allow s you to specify user-defined shutdown states for all fault conditions.
Chapter 2 Digital I/O NI PCI-8254R User Manual 2-12 ni.com Considerations When Connecting the Digital I/O The isolated trigger inputs on the NI 82 54R are current sinking and optically isolated. The following are co nsiderations you need to make when connecting the digital I/O.
Chapter 2 Digita l I/O © National Instruments Corporation 2-13 NI PCI-8254R User Manual Wiring an Isolated Output to an External Load The digital output circuit sources curren t to external loads, as shown in the following figu re. Caution Do no t draw more than 100 mA from 24 V or 30 V isolated outputs.
Chapter 2 Digital I/O NI PCI-8254R User Manual 2-14 ni.com Protecting Inductive Loads When an inductive load, such as a relay or solenoid, is connect ed to an output, a large counter-electrom ot ive force may occur at switching time due to energy stored in the inductive load.
Chapter 2 Digita l I/O © National Instruments Corporation 2-15 NI PCI-8254R User Manual T ransmission Line Effects Transmission line effects can degr ade the signals on the I/O cables and cause instability.
© National Instruments Corporation 3-1 NI PCI-8254R User Manual 3 Signal Connections The following diagram shows the conn ectors on the NI 8254R device.
Chapter 3 Signal Connections NI PCI-8254R User Manual 3- 2 ni.com T able 3 -1 summarizes th e functions of the connectors on the NI 8254R device. Connectors This section describes the connectors on the NI 8254R device and in cludes pinouts and signal descri ptions for each connector.
Chapter 3 Signal Connections © National Instruments Corporation 3-3 NI PCI-8254R User Manual T able 3 -2 summarizes th e functions of the power connector terminals.
Chapter 3 Signal Connections NI PCI-8254R User Manual 3- 4 ni.com Figure 3-2 illustrates the 44-pin D-SUB connector on the NI 8254R. Figure 3-2. NI 8254R 44-Pin D-SUB Connector T able 3-3 lists pin numbers, sign al names, and si gnal descriptions for the 44-pin D-SUB connector on the NI 8254R and the 37-pin terminal block.
Chapter 3 Signal Connections © National Instruments Corporation 3-5 NI PCI-8254R User Manual 5 6 C Common-mode signal of the NI 8255R device main power — 6 7 TTL Output 2 Pulse generator output Gen.
Chapter 3 Signal Connections NI PCI-8254R User Manual 3- 6 ni.com 16 2 TTL Input 1 Pulse generator trigger input T rigger Change Detector , General-purpose input 17 3 C Common-mode signal of the NI 82.
Chapter 3 Signal Connections © National Instruments Corporation 3-7 NI PCI-8254R User Manual 27 36 ISO Outp ut 2 General-purpose output — 28 37 ISO Outp ut 3 General-purpose output — 29 12 C iso .
Chapter 3 Signal Connections NI PCI-8254R User Manual 3- 8 ni.com Cabling IEEE 1394 Camera Cables You can connect cameras to the NI 8254R using standard IEEE 1394 cables.
Chapter 3 Signal Connections © National Instruments Corporation 3-9 NI PCI-8254R User Manual I/O T erminal Block National Instruments provides an I/O term inal block with the NI 8254R, which can be mounted either horizontal ly or vertically.
Chapter 3 Signal Connections NI PCI-8254R User Manual 3-10 ni.com The isolated outputs power connector on the NI 8254R device accommodates one power supply . The V terminal provides the isolated output circuitry (5 to 30 VDC) for the NI 8254 R de vice.
© National Instruments Corporation A- 1 NI PCI-8254R User Manu al A T echnical Support and Professional Ser vices Visit the following sections of the National Instruments Web site at ni.com for technical support an d professional services: • Support —Online technical support resources at ni.
Appendix A T echnical Support and Professional Services NI PCI-8254R User Manual A-2 ni.com • Calibration Certificate —If your product supports calibration, you can obtain the calibration certificate for your product at ni.com/calibration . If you searched ni.
© National Instruments Corporation G-1 NI PCI-8254R User Manual Glossar y A ADE Application development en vironment su ch as LabVIEW , V isual Basic, or MSVC. B bandwidth The range of frequencies present in a signal, or the range of frequencies to which a measuring device can respond.
Glossary NI PCI-8254R User Manual G-2 ni.com F falling edge An edge trigger occurs when the tr igg er signal passes throug h a specified threshold. A slope that is negati ve to the trig ger is specified as the falling edge. FireW ire A high-speed serial interface in ve nted by Apple Comput er in 1989, also known as IEEE 1394 or iLink.
Glossary © National Instruments Corporation G-3 NI PCI-8254R User Manual P pixel The fundamental picture element in a digital image. The smallest resolv able rectangular area of an imag e, either on a screen or stored in memory . Each pixel has its own brightness and color , usually represented as red, green, and blue i ntensities.
Glossary NI PCI-8254R User Manual G-4 ni.com V VDC V olts direct current. voltage The electromoti ve force..
© National Instruments Corporation I-1 NI PCI-825 4R User Manual Index A acquisition window control, 1-4 C cabling, 3-8 calibration certificate (NI resources), A-2 connector functions, 3-2 connectors.
Index NI PCI-8254R User Manual I-2 ni.com N National Instruments support and services, A-1 NI 1427 software programming choices NI V ision Bu ilder for Automated Inspection, 1-2 NI V ision Development.
Index © National Instruments Corporation I-3 NI PCI-825 4R User Manual T technical support, A-1 timed pulse output initiating, 2-5 ov erview, 2-5 training and certification (NI resources), A-1 transm.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il National Instruments NI PCI-8254R è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del National Instruments NI PCI-8254R - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso National Instruments NI PCI-8254R imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul National Instruments NI PCI-8254R ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il National Instruments NI PCI-8254R, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del National Instruments NI PCI-8254R.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il National Instruments NI PCI-8254R. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo National Instruments NI PCI-8254R insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
