Hello Zhefu,

your EPICS PV "caLab:waveDouble" already has a "native" EPICS time stamp. It will be automatically generated. You can see it when you set up a camonitor session. If this time stamp is unacceptable then you can write any time stamp to a second EPICS PV at same time (CA Lab can take a array of PV names to write to; see examples at homepage). But remember it won't be a consistent data set because of delay difference of data transmissions.

Best regards
Carsten

hi,

I want to put the signal waveform chart versus time to my PV from labview, and camonitor the PV in epics terminal.

I install Calab software to do this. As can be seen from the test.vi file in the attatchment. I could put waveform values (values of Y axis of chart by using NI-Scope widget) to my epics PV ("caLab:waveDouble") by using "Ca Lab epics put " widget. 

My problem is that I have no idea how to put time (values of X axis of chart) to another PV by using

"Ca Lab epics put " widget or any other methods, so I can camonitor the PV in epics terminal.

I have attatched the labview file (test.vi) in the attatchement, any help will be appreciated and thanks in advance.

Zhefu