+1
Under review

IQANrun measure vs IQANdesign measure

A DOMS 4 weeks ago in IQANrun updated by Ulrik Zakariasson (Software development) 3 weeks ago 4

Hi,

During my work, I save data in arrays, and at the end, I get data from a measure group.

I have an incrementing chanel that read every lines in the arrays and show it in a measure group.

If I read it with IQANrun, a lot of data are missing :


Image 4732

But if I read it with IQANdesign, I get all data :

Image 4734


The both graph must be the same,


Aspects that could matter for this case: 

-IQANrun software version

-Cycle time on the module you measure on

-Cycle time on the headmaster

Prior to version 7.04, there was an issue in IQANrun 7 that limited cycle time on measurements to the headmaster cycle time. 

IQANrun 7.04.9

Image 4741

Cycle time are 20ms for each MC43 of the machine,

But I have also a MD4-7 on the same CANbus, with a 50ms cycle time.

So when I'm measuring a measure group on a MC43, I am limited to the cycle time of the MD4-7 wich is on the same CANBus ?
But If  I copy value to Excel, sometime I have a newpoint point between 60ms and 100ms.

It's not exactly the cycle time of the MD4.


Export from IQANrun


Time [ms] Points to show in measure group
3020 0
3040 0
3060 0
3080 0
3100 0
3120 0
3140 6
3160 6
3180 6
3200 6
3220 6
3240 6
3260 12
3280 12
3300 12
3320 12
3340 12
3360 18
3380 18
3400 18

Export from IQANdesign :

Time [ms] Points to show in measure group
7960 0
7980 0
8000 3
8020 4
8040 5
8060 6
8080 6
8100 8
8120 9
8140 10
8160 11
8180 12
8200 12
8220 14
8240 15
8260 16
8280 17
8300 17
8320 19
8340 20



Under review

When measuring on a group with channels from multiple masters, you get the headmaster cycle time as step size. 

Measure on a group with channels from just one master, and you should be getting the cycle time of that master as step size. 

The problem that was solved in IQANrun 7.04 was that you got headmaster cycle time also when measuring on a group containing items from just one master. 

Looking closer at the printscreen from IQANrun, I see you are seeing 20 ms as sample time in the graph. It also does not seem to be an issue with missing samples, that would have been indicated as interruptions on the line showing green status, and in the background color.  


What IQANdesign version is the system made with?

What diagnostic interface are you using?

One more question in addition to Gustav's - is "Missing samples" enabled in IQANrun?