property nodes

[jseele69]

I have a program that counts motor revolutions up to a certain number of revolutions then resets.  So currently I am using a chain of daqmx functions: stop, clear, then start but the counter doesn't seem to start back up afterwards.  Does anyone know how I can reset the counter simply and systematically?

[jseele69]

I am trying to add properties to a daqmx channel property node but when I search and select the property I want (counter:reset:enable), nothing happens.  It only closes the search pop up without adding the property to the select property popup.  Does anyone know how to fix this?

[Kevin_Price]

1. You really should put a few minutes into neatening up your diagram wiring.  It's going to be helpful to *you* in the long run but in the meantime, it also helps us to help you.

2. The most immediate few things I'll recommend are:

• Do not call DAQmx Clear inside the Case Structure
• Wire the task refnum and error out from DAQmx Stop into DAQmx Start inside the Case Structure
• Pay attention to your error inside your loop.  Either send it to an indicator or use it for loop termination

-Kevin P

[Bob_Schor]

You created a Task, started it, then in your loop, you read one sample, and at a certain time later, stopped the Task, cleared the Task (which makes it disappear!), then tried to start a no-longer-present Task (trying to cheat by using the now-useless "former Task Reference" won't work).

Try removing the Clear Task from inside the Case statement.

Here's some advice -- always run wires in and out of (most) structures on the left and right sides.  Using the top and bottom of a Case Structure makes the code devilishly difficult to read.  Here's a partial fix -- select all of the code in the VI, then click on the "Broom" symbol on the menu bar to "clean up the mess".

Bob Schor