ReadMultiSamples from MultiChannels - old values arrive

[klaus11]

Hi!

I have a problem with the program which is included in the post:
I am using  DAQMx with my PCI-MIO-16E-1 card.

I just want to read in some voltages from all AI in a single task.

In my constructor I have declared the things. (look at the program code).

The only problem is, if I run the method "getAI" in a loop, I get old values, so If I measure with the multimeter and increase the voltage, on my pc it only shows realtime values 1-5sec later! 

why that?
I have 200Hz clock rate, and want to read with ReadMultiSample 10 Samples.

I used: Stream.ReadOverwriteMode = ReadOverwriteMode.OverwriteUnreadSamples; in the constructor, to be sure, that if my loop is too frequently, not the old 200 values which are stored in one second are used.

Is this right?

How can I get real Time values?
Please reply!

Thanks a lot!
Yours, Klaus

[klaus11]

I want also explain, that i  use my function in a loop witch needs at least 64msec of time.

maybe i am reading the old values from the buffer? but with continous samples, there is no buffer, am I right?

Please help!

[bilalD]

See my response here about the old data. Yes, there is an internal buffer with a cont. acquisition operation.