National Instruments 322391A-01 manual

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Buen manual de instrucciones

Las leyes obligan al vendedor a entregarle al comprador, junto con el producto, el manual de instrucciones National Instruments 322391A-01. La falta del manual o facilitar información incorrecta al consumidor constituyen una base de reclamación por no estar de acuerdo el producto con el contrato. Según la ley, está permitido adjuntar un manual de otra forma que no sea en papel, lo cual últimamente es bastante común y los fabricantes nos facilitan un manual gráfico, su versión electrónica National Instruments 322391A-01 o vídeos de instrucciones para usuarios. La condición es que tenga una forma legible y entendible.

¿Qué es un manual de instrucciones?

El nombre proviene de la palabra latina “instructio”, es decir, ordenar. Por lo tanto, en un manual National Instruments 322391A-01 se puede encontrar la descripción de las etapas de actuación. El propósito de un manual es enseñar, facilitar el encendido o el uso de un dispositivo o la realización de acciones concretas. Un manual de instrucciones también es una fuente de información acerca de un objeto o un servicio, es una pista.

Desafortunadamente pocos usuarios destinan su tiempo a leer manuales National Instruments 322391A-01, sin embargo, un buen manual nos permite, no solo conocer una cantidad de funcionalidades adicionales del dispositivo comprado, sino también evitar la mayoría de fallos.

Entonces, ¿qué debe contener el manual de instrucciones perfecto?

Sobre todo, un manual de instrucciones National Instruments 322391A-01 debe contener:
- información acerca de las especificaciones técnicas del dispositivo National Instruments 322391A-01
- nombre de fabricante y año de fabricación del dispositivo National Instruments 322391A-01
- condiciones de uso, configuración y mantenimiento del dispositivo National Instruments 322391A-01
- marcas de seguridad y certificados que confirmen su concordancia con determinadas normativas

¿Por qué no leemos los manuales de instrucciones?

Normalmente es por la falta de tiempo y seguridad acerca de las funcionalidades determinadas de los dispositivos comprados. Desafortunadamente la conexión y el encendido de National Instruments 322391A-01 no es suficiente. El manual de instrucciones siempre contiene una serie de indicaciones acerca de determinadas funcionalidades, normas de seguridad, consejos de mantenimiento (incluso qué productos usar), fallos eventuales de National Instruments 322391A-01 y maneras de solucionar los problemas que puedan ocurrir durante su uso. Al final, en un manual se pueden encontrar los detalles de servicio técnico National Instruments en caso de que las soluciones propuestas no hayan funcionado. Actualmente gozan de éxito manuales de instrucciones en forma de animaciones interesantes o vídeo manuales que llegan al usuario mucho mejor que en forma de un folleto. Este tipo de manual ayuda a que el usuario vea el vídeo entero sin saltarse las especificaciones y las descripciones técnicas complicadas de National Instruments 322391A-01, como se suele hacer teniendo una versión en papel.

¿Por qué vale la pena leer los manuales de instrucciones?

Sobre todo es en ellos donde encontraremos las respuestas acerca de la construcción, las posibilidades del dispositivo National Instruments 322391A-01, el uso de determinados accesorios y una serie de informaciones que permiten aprovechar completamente sus funciones y comodidades.

Tras una compra exitosa de un equipo o un dispositivo, vale la pena dedicar un momento para familiarizarse con cada parte del manual National Instruments 322391A-01. Actualmente se preparan y traducen con dedicación, para que no solo sean comprensibles para los usuarios, sino que también cumplan su función básica de información y ayuda.

Índice de manuales de instrucciones

  • Página 1

    Lookout Operator’s Manual Lookout Op erator’ s Manual August 1999 Edit ion Part Numb er 32239 1A-01[...]

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    Worl dwide Tec hnical Supp ort and Pro duct Inform ation www.natinst.com Nation al In strument s Corp orate He adqu arters 11500 North M op ac Expressway Austin, Texas 78759 -3504 USA Tel: 512 794 01 00 Worldwide Offices Australi a 03 9879 5166, Austria 06 62 45 79 9 0 0, Bel gi um 02 757 00 20, Brazil 0 11 284 501 1, Canada ( Calgar y) 403 27 4 93[...]

  • Página 3

    Important Information Warranty The media on which you receive National Instruments software are warranted not to fail to execute programming instructions, du e to d efects in mate rials an d workman sh ip, for a period of 9 0 d ays from d ate o f sh ip m ent, as evidenced by receipts or other documentation. National Instruments will, at its option,[...]

  • Página 4

    Conventions The follo wing con ventions appear in this manual: » The » symbol leads you throu gh nested menu items and dial og box optio ns to a f inal action. The sequence File»P ag e Se tup» Opti ons directs you to pull down the File menu, se lect the Page Setup item , and select Options from the last dia l og bo x . This icon denotes a n ote[...]

  • Página 5

    © Nationa l Instrume nts Corpora tion v Looko ut Operator’s Manual Contents Chapter 1 Installing Lo okout Hardware and Software Re quirements ...................... ............ ................. ................. ...... 1-1 TCP/IP Networking .................. ................ ................. ................. ............ ................. .[...]

  • Página 6

    Contents Looko ut Operator ’s Manu al vi www.na tinst.com Lookout App lication Files ............ ........... ................. ................. ................. ........... ........ 2- 8 Process File ........ ................. ................. ................. ........... ................. .............. 2- 8 Source Code File ...... ........[...]

  • Página 7

    Conten ts © Nationa l Instrume nts Corpora tion vii Looko ut Operator’s Manual Window Commands ................. ..... ...... ........... ...... ..... ...... ........... ...... ...... ..... ............ ..... . 3-18 Window»Arrange Ico ns.............. ............ ................. ................. ................. ...... 3-18 Window»Minimiz[...]

  • Página 8

    © Nationa l Instrume nts Corpora tion 1-1 Lookout Operato r’ s Manual 1 Installing Lookout This chapter explains how to install and configure the run time Lookout software. This manual e xplains how to install, configu re, and use the Look out runtime software. It assumes that you are already familiar with your operating system. Hardware and Sof[...]

  • Página 9

    Chapter 1 Installing Looko ut Looko ut Operator ’ s M anual 1-2 www.natinst.com TCP/IP Networking You mu st be p roper ly set up on a netw ork with TCP/IP protoc ols ins talled if you want to us e the netwo rking capabilities of Look out 4. If TCP/IP is not work ing properl y on you r computer , consult you r system admi nistrator . Installing Lo[...]

  • Página 10

    Chapte r 1 Installing Look out © Nationa l Instrume nts Corpora tion 1-3 Lookout Operato r’ s Manual Registering Lookout Be sure to register your Lookout package to receiv e your permanen t unlock code. As an unregi s tered p ackage, Lookout is l imi ted to 50 I/O points and one client connection and only runs for 30 days. If you are i n st al l[...]

  • Página 11

    Chapter 1 Installing Looko ut Looko ut Operator ’ s M anual 1-4 www.natinst.com 2. En ter your n ame in the Name fiel d . 3. Enter the Organi zation name e xactly as it appears on the key code fax sent in response t o your re gis tration, in cluding pu nctuation marks. This text is used in comb inat ion with the key code , and s o it must be exac[...]

  • Página 12

    Chapte r 1 Installing Look out © Nationa l Instrume nts Corpora tion 1-5 Lookout Operato r’ s Manual If you ar e certain that you typ ed the information cor rectly and Lookout does not accept it, call the National Instrum ents technical support line for help. Changin g Registra tion Info rmatio n If you want to change the number of Lo okout I/O [...]

  • Página 13

    Chapter 1 Installing Looko ut Looko ut Operator ’ s M anual 1-6 www.natinst.com T o add or ch ange client connection information in Lookou t, Select Option s»System fro m the me nu, and cl ick on the Change Client License bu tton. The follo wing dialog box app ears. Click on the Add b utton. The follo wing dialog box ap pears. Enter yo ur Organ [...]

  • Página 14

    Chapte r 1 Installing Look out © Nationa l Instrume nts Corpora tion 1-7 Lookout Operato r’ s Manual Setting System Options The first time yo u open Lookou t is a goo d ti me to set som e of t he Looko ut system opti ons. In Looko ut, sel ect Options» Syste m fr om the menu bar . The Syst em Options dialog box appears as s hown in the follo win[...]

  • Página 15

    Chapter 1 Installing Looko ut Looko ut Operator ’ s M anual 1-8 www.natinst.com Citadel Dat abase Settin gs The Citadel Database fields set the default destination for Citadel data logged by Lookout. All proces ses runn ing unde r a single in stance of Lookout will use th is data path to lo g d ata to Citadel, un less you overrid e this setting w[...]

  • Página 16

    Chapte r 1 Installing Look out © Nationa l Instrume nts Corpora tion 1-9 Lookout Operato r’ s Manual Startup Process File Setting If your co mputer runs Lookout 24 hours a day , you may want t o ensure t hat, if the computer temporarily loses power, it will automaticall y reboo t and begin ex ecuting you r processes when power returns . T o get [...]

  • Página 17

    Chapter 1 Installing Looko ut Looko ut Operator ’ s M anual 1-10 www.natinst.com T o make sure Lo okout load s and runs when your co mputer boots or reboots, con su lt y our operating sy stem documen tatio n instructions on how to set a default startu p application.[...]

  • Página 18

    © Nationa l Instrume nts Corpora tion 2-1 Lookout Operato r’ s Manual 2 Lookout Basics This chapte r explains ho w to start and get around within Looko ut. Basically , you use the mous e, ke yboard, touch screens, and s imilar tools t o manipulate controls on Look out control panels. Mo st of what you do is as simple as throwing a switch or adju[...]

  • Página 19

    Chapter 2 Lookout Ba sics Looko ut Operator ’ s M anual 2-2 www.natinst.com Y our system ad ministr ator sho uld ha ve as signed you a user accoun t name and passw ord. Enter your user n ame and pass word. The Idle time field determ ines how long a p eriod of in acti vity Loo kout will wait before logging off the current user . When set to 0, Loo[...]

  • Página 20

    Chapter 2 Lookou t Basics © Nationa l Instrume nts Corpora tion 2-3 Lookout Operato r’ s Manual Open ing a P roces s Fi le 1. If you ha ve a Lookout process f ile av ailabl e, select the File »Open menu ite m fro m the L o okout me nu ba r . 2. In the File na me data f iel d, ent er the na me o f a L ookout p roces s file (the y ha v e a .l4p f[...]

  • Página 21

    Chapter 2 Lookout Ba sics Looko ut Operator ’ s M anual 2-4 www.natinst.com Figur e 2-1. The L ookou t Scree n Title Bar The title bar at th e top of the Lo okout w indow display s the program na me and the name of the cu rrently active process. If a control panel is maximized, the cont rol panel name appears in th e title bar. 1 Menu Bar 2 Title[...]

  • Página 22

    Chapter 2 Lookou t Basics © Nationa l Instrume nts Corpora tion 2-5 Lookout Operato r’ s Manual Menu Ba r The menu bar displays t he currently avai lable menu co mmands. Some of these command s may o r may not be avai lable to you, de pending on y our security level. Status Bar The status bar i s at the bottom of the Lo okout window. When in run[...]

  • Página 23

    Chapter 2 Lookout Ba sics Looko ut Operator ’ s M anual 2-6 www.natinst.com a pop-up state or minimized. Wh en a pop- up control panel is display ed, it remains on top o f all other pan els unt il you mi nimize it. Control panels do no t ha ve a s tandard appearan ce. Some contro l panels may onl y display informati on, while ot hers combine cont[...]

  • Página 24

    Chapter 2 Lookou t Basics © Nationa l Instrume nts Corpora tion 2-7 Lookout Operato r’ s Manual Y ou can ha v e the same sor t of syn chronous operatio n between contr ols in dif ferent pro cesses running o n your computer , or between contro ls running in pro cesses on di f ferent com puters in your net work. Lo okout netwo rking makes this po [...]

  • Página 25

    Chapter 2 Lookout Ba sics Looko ut Operator ’ s M anual 2-8 www.natinst.com Virtual Keyboard Lookout also has a virtu al keyboard you can us e with a touch-sensitive screen or a mouse. T o enable the virtual ke yboard, select Option s»Syst em and then check Left Mo us e Click or Right Mouse Click in the Virtual Keyboa r d Pops Up section of the [...]

  • Página 26

    Chapter 2 Lookou t Basics © Nationa l Instrume nts Corpora tion 2-9 Lookout Operato r’ s Manual T o compile a source f ile inside Lookout, select File»Open . The following dial og box op ens. Set the Files of type to Lookout Source Files (*.lks) and select the source file you want to compile. State File The state fi le contains the actual value[...]

  • Página 27

    Chapter 2 Lookout Ba sics Looko ut Operator ’ s M anual 2-10 www.natinst.com Lookout Windows Ser vices Lookout requires th ree background services that ru n in Windows outside of the Look out appli cation its elf to be running on your compu ter while i t is runnin g: Looko ut Citad el Server, Lookout C lassified Ad s, and Look out Time Synchr oni[...]

  • Página 28

    © Nationa l Instrume nts Corpora tion 3-1 Lookout Operato r’ s Manual 3 Lookout Runtime Menu Commands This chapt er descr ibes Lookout menu bar p ull-do wn commands av ailable in run mode. Some m enu items may be disab led, depend ing on your security level. Every menu command has a predetermined security lev el associated with it. Only operator[...]

  • Página 29

    Chapter 3 Lookout Runt ime Menu Com mands Looko ut Operator ’ s M anual 3-2 www.natinst.com If for s ome reason Looko ut refuses to lo ad a .l4p process f ile, you can attempt to recompile by opening a Lookout .lks fil e. S el ect Lookout Source Files (*.lks) in the Files of Type c o mbo box. F ile»R eopen Security Level: 8 Shortc ut Keys: none [...]

  • Página 30

    Chapte r 3 Lookout Runtim e Menu Comm ands © Nationa l Instrume nts Corpora tion 3-3 Lookout Operato r’ s Manual Caution Th e File»C lose command shuts do wn proces s ex ecution— be sure that this is what you wa nt to do b efore selecti ng this comman d. Y our Lookout applicati on may be controlling critical p r ocesses, and s huttin g it dow[...]

  • Página 31

    Chapter 3 Lookout Runt ime Menu Com mands Looko ut Operator ’ s M anual 3-4 www.natinst.com F ile»L og on Security Level: 1 Shortcut Keys: <CTRL+L> Use the F ile»L og on command to log on to Loo kout as the cur rent operator/ integr ator with y our predef ined accoun t name and password. Only one person can log o n at a time. Y ou can als[...]

  • Página 32

    Chapte r 3 Lookout Runtim e Menu Comm ands © Nationa l Instrume nts Corpora tion 3-5 Lookout Operato r’ s Manual F ile»Log off Security Level: 1 Shortcut Keys: <CTRL+L> The F ile»Log off command instantly logs of f the current account name and leav es (nobody) logged onto the system. Y ou can also initiate this command by c licking on th[...]

  • Página 33

    Chapter 3 Lookout Runt ime Menu Com mands Looko ut Operator ’ s M anual 3-6 www.natinst.com Option Commands Options »S yste m Security Level: 9 Shortc ut Keys: none The O ptions»S ystem comman d is used to conf igure v arious system-le vel operating parameters. See the Set ting System O pt ions sectio n of Chapte r 1 , Inst alling Looko ut , fo[...]

  • Página 34

    Chapte r 3 Lookout Runtim e Menu Comm ands © Nationa l Instrume nts Corpora tion 3-7 Lookout Operato r’ s Manual Options »Serial Ports Security Level: 9 Shortc ut Keys: none Use the O pti ons»Serial P orts command to conf igure your comp uter serial port commu nicat ion topolo gy . Each serial port can have a unique setting: Hardwired , Dial-u[...]

  • Página 35

    Chapter 3 Lookout Runt ime Menu Com mands Looko ut Operator ’ s M anual 3-8 www.natinst.com Selectin g the Serial Po rt The Serial port d ata field i s a drop-down listbox. Us e it to select the communicati on port yo u are defin ing. While s oftware may allow m any serial po rts, mos t computers support o nly two ser ial ports without additional[...]

  • Página 36

    Chapte r 3 Lookout Runtim e Menu Comm ands © Nationa l Instrume nts Corpora tion 3-9 Lookout Operato r’ s Manual When you se lect R TS/CTS har dwar e hands hakin g, Lo oko ut con trols t he R TS, or reques t-to-send pin, and mon itors the CT S, or clear -to-se nd pin, during data transm ission ( pins 4 a nd 5 on a 25 -pin RS-23 2 connector). The[...]

  • Página 37

    Chapter 3 Lookout Runt ime Menu Com mands Looko ut Operator ’ s M anual 3-10 www.natinst.com If you s et the RTS delay of f s etting too high, th e rem o te device begins transmitting it s response before the local radio is unkeyed, causing a communication alarm in Lookou t. Dial-Up Modem Set tings Use the Dial-up serial conn ection when y ou use[...]

  • Página 38

    Chapte r 3 Lookout Runtim e Menu Comm ands © Nationa l Instrume nts Corpora tion 3-11 Look out Opera tor’ s Manual The Hayes Co rporation standard command for co nfi guring th e modem to hang up an d enter command mod e upon lo ss of DTR is &D2 . Y ou can use a terminal program to make this s e ttin g permanent on most modems by entering t h[...]

  • Página 39

    Chapter 3 Lookout Runt ime Menu Com mands Looko ut Operator ’ s M anual 3-12 www.natinst.com Alarm Commands A larms»S how Security Level: 1 Shortcut Keys: <CTRL+A> The A larms»Show command instantly d isplays the alarm window as a floating sty le windo w if it is not already being d isplayed. Y ou can select this command when you want to [...]

  • Página 40

    Chapte r 3 Lookout Runtim e Menu Comm ands © Nationa l Instrume nts Corpora tion 3-13 Look out Opera tor’ s Manual than can be displayed in the alarms windo w at once, a scroll bar ap pears along the right side of th e windo w . The following illustration shows an alarms wind o w with Window s tyle set to Bottom , and Window height set to 4. A l[...]

  • Página 41

    Chapter 3 Lookout Runt ime Menu Com mands Looko ut Operator ’ s M anual 3-14 www.natinst.com Setting Ack User Name restricts your alarm monitoring to alarms ackno wledged b y that particular user . Y ou can only enter one user name at a time, b ut you can use wild card char acters to widen the scope of th e alarms repor ted. The Ack Comment filte[...]

  • Página 42

    Chapte r 3 Lookout Runtim e Menu Comm ands © Nationa l Instrume nts Corpora tion 3-15 Look out Opera tor’ s Manual The follo wing dialog box appears. Select the time range you wa nt to print alarms and e v ents from with the items in the Print Range section of the dialog box. Notice that wh en def ining your o wn range y ou use mon th and day fo[...]

  • Página 43

    Chapter 3 Lookout Runt ime Menu Com mands Looko ut Operator ’ s M anual 3-16 www.natinst.com Set the format for printing times in the Time Fo rma t list. Y ou can adju st y our alarm filters for printing by clicking on the Filter Options button to access the alarm f ilter options Note Y ou can print alarms as t hey happen by specifying a printer [...]

  • Página 44

    Chapte r 3 Lookout Runtim e Menu Comm ands © Nationa l Instrume nts Corpora tion 3-17 Look out Opera tor’ s Manual print ou t the da y’ s alarms based on comments, s o usin g certain standard comments (in ad dition to circumstan tial comments) can make the filtering process easier . A larms»Ack nowled ge All Security Level: 2 Shortc ut Keys: [...]

  • Página 45

    Chapter 3 Lookout Runt ime Menu Com mands Looko ut Operator ’ s M anual 3-18 www.natinst.com Right-click on an alarm and select Properties . The fo llo wing d ialog box listing specifi c information about the alarm or ev ent appears. Y ou can scroll through alarms and ev ents using the Previous and Next bu ttons of this dial og. Window Commands W[...]

  • Página 46

    Chapte r 3 Lookout Runtim e Menu Comm ands © Nationa l Instrume nts Corpora tion 3-19 Look out Opera tor’ s Manual Window»M ore Windows If you have too many con trol panels to fit in the Window menu, the M ore Windows command app ears at the bottom of the Window menu. The W indow»M ore Windows command pops up a d ialog box you can use to scrol[...]

  • Página 47

    Chapter 3 Lookout Runt ime Menu Com mands Looko ut Operator ’ s M anual 3-20 www.natinst.com Run»R evise Security Level: 9 Shortc ut Keys: none Use the R un»R evise command t o modify p re viousl y conf igured r un commands. Run»Delet e Security Level: 9 Shortc ut Keys: none Use the R un»D elete to remov e pre viously conf igured run commands[...]

  • Página 48

    © Nationa l Instrume nts Corpora tion A-1 Looko ut Operator’s Manual A T echnical Support Resources This appendix describ es the comprehensi v e resources a v ailable to you in the T echnical Support s ection of the National In struments W eb site and pro vides technical support telephone nu mbers for you to use if you ha ve trouble conne cting [...]

  • Página 49

    Appendix A T echnical Support Resources Looko ut Operator ’s Manu al A-2 www .natinst.c om Software-Relate d Resources • Instrument Driver Network —A library with hundreds o f instrument dri v ers for contr ol of stand al one in st ru ment s vi a GP IB, VXI, or s eri al interfaces. Y ou also can submit a requ est for a particular instrumen t [...]

  • Página 50

    © Nationa l Instrume nts Corpora tion G-1 Lookout Operato r’ s Manual Glossar y Pref ix Meaning V a lue m- milli- 10 –3 k- kilo- 10 3 M- meg a- 10 6 A alarm S oftware notif ication of a condition in a pro cess. This alarm may call attention of a v al ue that has e xceeded or fallen b elow cer tain lev els, set in the object database or in an A[...]

  • Página 51

    Gloss ar y Look out Oper ator’ s Manual G-2 www .natinst. com D d at a mem be r Data sour ce or sink associated with a Lookout objec t. A readab le data member , or source, may be used in express ions or as inputs to other objects. A wr itable d ata mem ber, o r sin k, may have at m ost one connection into it, created using the Object»Edit Conne[...]

  • Página 52

    Glos sary © Nationa l Instrume nts Corpora tion G-3 Lookout Operato r’ s Manual F fr am e Seque nce of by tes sent fr om a c ompute r to a d evic e o r v ice v ers a. T he syntax of the f rame d epen ds on th e pro tocol be ing used. A read f rame contains eno ugh informa t io n to spe cify a set of variable s wh ose values the device s hould re[...]

  • Página 53

    Gloss ar y Look out Oper ator’ s Manual G-4 www .natinst. com L .l4p f iles File extension for Lookout p rocess files. These are the compiled f iles Looko ut runs when it runs a process. .l4t files File extension for a Lo okout state file, which stores th e values for Lookout controls and other objects with state information. .lka f iles File ext[...]

  • Página 54

    Glos sary © Nationa l Instrume nts Corpora tion G-5 Lookout Operato r’ s Manual R recei ve gap A serial communications setting that determ ines the number of em pty bytes (or amount of time) a dri ver recei ves bef ore recognizing the end of a message frame and req uesting another message. R TS Request to S end, part of a handshaki ng protocol f[...]

  • Página 55

    © Nationa l Instrume nts Corpora tion I-1 Lookout Operato r’ s Manual Index A About Lo okout command , 3-20 Acknowledg e command, Alar m menu, 3-16 to 3-17 Acknowledg e All command, Alarm menu, 3-17 Add command, Run men u, 3-19 adding client con nections, 1-5 to 1-6 Alarm comman ds, 3-12 to 3-18 Acknowledg e, 3-16 to 3-17 Acknowledg e All, 3-17 [...]

  • Página 56

    Inde x Look out Oper ator’ s Manual I-2 www .natinst. com Help commands About Lo okout, 3-20 Conten ts, 3-20 I Import A P T Data base c ommand , 3-11 installing Loo kout, 1-2 I/O points changing nu mber of, 1-5 for unregistered Loo kout package, 1 -3 K keycode adding client con nections, 1-5 regist ering Looki ng, 1-4 L log alarms settings, 1 -8 [...]

  • Página 57

    Index © Nationa l Instrume nts Corpora tion I-3 Lookout Operato r’ s Manual Optio n c omma nds, 3-6 to 3 -11. See also system opti ons, sett ing . Import APT Databa se, 3-11 Modbus, 3-1 1 Serial Ports, 3-7 to 3-11 System, 3-6 User Manager, 3-6 P panel nav igation arrows , 1-8 Print comma nd Alarm menu , 3-14 to 3-16 File menu , 3-3 to 3-4 probl [...]

  • Página 58

    Inde x Look out Oper ator’ s Manual I-4 www .natinst. com T TCP / IP netw orki ng, 1- 2 technical support resou rces, A-1 to A-2 title bar, 2-4 n Title comman d, Windo w menu, 3-18 U User Manager co mmand, 3-6 V virtual key board opera ting, 2 -8 settings, 1 -8 virtual key pad, 2-7 W Web suppo rt from Nati onal Inst ruments, A-1 to A-2 online pro[...]