Using 4 wire PT1000 on NI 9219

[Aditi.hiray]

I am using PT1000 on my NI9219 hardware to collect temperature data using DAQmx. 

I have created a one seperate task for taking inputs of T1 and T2. When I run the task, It is showing temperature values. But when I create a simple program for this, values are not at all dispying. What will be the possible reasons?

[GerdW]

Hi Aditi,

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@Aditi.hiray wrote:

But when I create a simple program for this, values are not at all dispying. What will be the possible reasons?

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So the reason will be within that "simple program" which you created, but failed to attach!

[Aditi.hiray]

Sorry, I forgot to attached..

Here I have attached both my programs,

1.  for t1 temp input (test)

2. with t1, t2 and flow meter (Analog input)

[LVNinja · Accepted solution]

Run the program with highlight execution and see step by step  where the error is happening. 

[Aditi.hiray]

Thanks for suggesting me highlight execution method. 

I am getting following errors:

 200077 (Read mx) although I have specified my channels.

200072 (Create a channel) If I select my temperature task in 'task in' 

Since I am new in Labview programming, correct me if I am doing anything wrong. 

I appreciate your help 🙂

[GerdW]

Hi Aditi,

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@Aditi.hiray wrote:

I am getting following errors:

 200077 (Read mx) although I have specified my channels.

200072 (Create a channel) If I select my temperature task in 'task in' 

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Did you read the error explanations?

-200077: unsupported value of the property

-200072: duplicate channels in task not supported

Do you correctly setup the DAQmx task?

Which DAQmxRead gives the error?

Why do you select a task when you explicitely wire channels to the CreateChannel function?

[Aditi.hiray]

Thanks for your reply!

Yes I did setup the task correctly.

For t1 temp I have assigned a0 port and for t2 temp a1 port. 

But the thing I did is, I have assigned one task for different programs, is that generating any error? 

[GerdW]

Hi Aditi,

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@Aditi.hiray wrote:

But the thing I did is, I have assigned one task for different programs, is that generating any error? 

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Do you run those "different programs" in parallel? That might be the source of your problems…

A DAQmx task is a resource which can only be run/actively used once at a time!

[Aditi.hiray]

No I don't!

Till sample clock, it is running ok. but once signal leaves from read mx 'error 200077' occurs which is 

Requested value is not a supported value for this property. The property value may be invalid because it conflicts with another property.

[Aditi.hiray]

Is this happening because of lack of any specific library? which libraries do I need to install exactly?