how to display value in waveform chart

[mom]

dear sir

i am using labview 7.0 with dsc module for scada.

 now i want to display the difference between two tags value in waveform chart. Also i want to display that difference value on y axis and system date and time on x axis continously. Also if there will change in that tag value then there should be reflection of that value on wavwform chart with system time. Really i am in trouble. please help me.

falgandha mohire

[Nadim R]

Hi Falgandha,

What do you mean displaying tag values on a waveform chart?  If I understand your question correctly, you would like to display data corresponding to the system time on the x axis.  If that is the case, you may want to use the XY graph and send the system time to the x array. 


I hope this helps,

Regards,

Nadim
Applications Engineering
National Instruments

[Ben]

Nadim,

Why would an XY graph be preferable to using a Waveform Chart where the "t0" is the time of the measurement?

I don't get it.

Ben

[Steven_C]

Hi Ben and Falgandha ,

You are absolutely right, Ben- Sorry for the wrong advice Falgandha. 

I guess my real question would be, what kind of results are you expecting while plotting on a waveform chart?

Regards,

Nadim

Applications Engineering

National Instruments