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razzik

Range Problem with Simulated PXIe-4353

Status: New

This Topic is base on other topic in PXI Forum (Link).

The main problem is the Range passing the Min/Max limitation.

 

I would like to simulate a channels in "Nominal" Case.

1. The range should be based on the Min/Max limitation.

2. I could select input style (Sin Wave, Triple Wave, Random in sub range, DC with error range, based on external data,...)

3. Near to Real timing simulation include cases of sync between different channel rates.

 

Currently,

1. The range is limited to the Min/Max Values. Excluded the cases show below.

2. Only Sin Wave. Excluded an Odd Case show below.

3. I tried case of sync between 2 channel with different rates. the simulation is not close to the real DAQ case. 

 

 

Here are the cases from the PXI Forum (Link😞

1st problematic case

1. Define a Simulated Device - PXIe-4353 in MAX.

2. Open "Test Panel"

3. Use the default parameters of the test:

  a. Measurement type - thermocouple

  b. Max Input Limit - 100

  c. Min Input Limit - 0

  d. Units - Deg C

  e. Thermocouple type - J

  f. CJC Source - Built In

4. Click Start.

 

The result is Sin Wave.

The sample values range ~[-1030,-74.7], out of the Max/Min Limits.

=> BAD sample results, values lower than -273 C ?!?!?!?!

 

2nd Problematic Case

If I change the Max/Min Limits to other valid range like [-200,1200]

The sample values range is BAD

And, the result is some kind of Non-Sin Wave

 

3rd Non-temperature Case

If I change the Measurement type to Voltage.

The sample values range is based on the Max/Min Limits.

=> So it is OK

 

Tnx,

Raz

 

 

2 Comments
crossrulz
Knight of NI

Is this an idea to make things better or asking for help?  If an idea, it is not stated well as far as what you would like.  Assuming I am understanding correctly, I think you really want this: Interactive DaqMx simulation interface


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razzik
Member

Two issues:

 

1. The idea of Interactive DaqMx simulation interface is great.

I work with LabWindow/CVI. So, if the feather would be in the level of MAX (Not Only LabView) it would be great.

Plus, simulated timing and sync between different simulated Devices is required.

(Trigger should have a meaning in simulated Devices)

 

2. There are Bugs with simulated thermocouple Device

When I simulate the PXIe-4353 device and select the Measurement type as thermocouple.

The major problem is the values where out of the Min/Max Range defined by creating the channel.

This is a problem in the software I develop, It is a problem working with values below -273C.

The minor problem is in 2nd case, the output is not a Sin Wave.

 

Tnx, Raz