Create a not User Event

[JÞB]

lets clairify this!  some poeple are presenting wrong infromation (sorry guys, Lynn and Y/ are both wrong or are being unintentionally confusing)

Value Changed events are thrown by any Gobject that has a value property.  Both controlls and indicators have Value properties.

The real question is what causes, or does not cause, the Value changed event to fire!!!

I will give examples:

• Use a Local variable to write "Value" to a control or indicator... No value changed event fires
• Use a Global varialble to write "Value" to a control or indicator... No value changed event fires
• Data arrives on a wire going into an indicators terminal. .. No value changed event fires
• Use a property node "Value" to write "Value" to a control or indicator... No value changed event fires
• Use a property node "Value (Signaling)" to write "Value" to a control or indicator...Value changed event DOES fire EVEN if the new value is the same as the old value!
• Use a user (yup, that quadruped thing between the keyboard and chair that pounds on those square thingies with letters on them) to change the value of a control or indicator and then press either the check box next to the run arrow or the enter key...Value changed event DOES fire EVEN if the new value is the same as the old value!
• Press an increment or decrement arrow on a numeric type control..Value changed event DOES fire.

I hope that helped

[johnsold]

Jeff,

Thanks for the clarifications. My apologies to anyone I may have confused or misled.

How can the user change the value of an indicator on a running VI? It does not work for me.  I can select the current value, but cannot change it. The Check box is not visible while running. Enter does not trigger a Value Changed event.

Lynn

[RavensFan]

You can still have a value change event for indicators, but only through the Value (signalling) property.  Obviously the User is not capable of triggering the value change event since they can not change the value of the indicator directly while the VI is running.  I think you hanging up on semantics.

[johnsold]

That is the way I understand it.  Jeff seemed to suggest that the user could trigger a value change event on an indicator in the next to last bullet point.

Lynn

[RavensFan]

You're right.  He did say that in the next to last bullet point with "Use a user ... to change the value of a control or indicator and then press either the check box next to the run arrow or the enter key..."

I was reading it by what I'm sure he meant "use a user to change the value of a control." rather than what he typed.

(Now reading that closer, I don't know what he is referring to by the "check box next to the run arrow".)

[johnsold]

That check box is in the toolbar of a VI in edit mode.  It disappears when the VI is running.

Lynn

[RavensFan]

Okay.  Now I see it. When the cursor is in the control or indicator.

I had never noticed it before.

[JÞB]

swear I deleted " or indicator" in that bullet point when I copied n pasted!

[Yamaeda]

OPs last post seems to indicate it's about DaqMX-events, which is another beast. 🙂

/Y

[crossrulz]

---

@gantarone wrote:

I wanted to take only the events that have changed in daqmx

---

Can you clearify and elaborate on this statement some more?  I don't understand your goal.  Some more context would help as well.