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Resumen, trucos y pistas sobre la toma de decisiones en un VI

Module by: Juan Martínez. E-mail the author

Based on: Summary, Tips, and Tricks on Making Decisions in a VI by National Instruments

  • La función Select permite elegir entre dos entradas en función del valor que tome una tercera entrada booleana.
  • Una estructura Case tiene dos o más subdiagramas o casos. Solo se puede ver uno de los subdiagramas cada vez, y la estructura ejecuta solo un caso cada vez.
  • Si el terminal selector del caso fuera una variable Booleana, la estructura tendría un caso True y un caso False. Si el terminal selector fuera un entero, una cadena, o un valor de tipo enumerado, la estructura entonces podría hasta 2311 2 31 1 casos.
  • Las entradas están disponibles para todos los subdiagramas de una estructura Case, pero los subdiagramas no tienen porque usar todas las entradas. Si al menos un túnel de salida queda sin definir, todos los túneles de salida en la estructura aparecerán como cuadros blancos.
  • Cuando se crea un subVI a partir de una estructura Case, hay que conectar la entrada de error al terminal selector, y colocar en todos los subVI el código en el caso No Error para prevenir la ejecución del subVI si se recibe un error.
  • Los Formula Node son útiles para ecuaciones que tienen muchas variables o que sean complicadas de implementar o para usar código basado en texto ya existente. Cada sentencia de la ecuación debe terminar con un punto y coma (;).

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