Virtual channel

[asaikk]

Hi

For an exercise, I made a virtual channel "DataBoxV" and an expression below on the Local CHANNEL "Pressure";

\\ Test Virtual Channel

private Data02 = Pressure[0]

DataBoxV.addValue(Data02)

This did not work, while with a channel of the same name made on "Local CHANNEL", the same expression worked fine.

Would you please explain the reason?

Thanks in advance.

[AzeoTech]

V channels you can just do:

dataBoxV = data02

and it will do essentially the same thing. Truthfully, V channels are a left over from before DAQFactory had variables, but it appears that many people still use them.

[asaikk]

I applied the line you mentioned (below), but it did not work either(the ctl file attached).

"dataBoxV = data02"

I wonder why.

The version of my DAQFactory Express is 5.83.

[AzeoTech]

I really am having a bad week:

To access V channels, you have to put V. in front of them:

V.dataBoxV = data02

and probably:

V.dataBoxV.addValue(data02)

[asaikk]

Many thanks for the reply.

Both

"V.dataBoxV = data02"

and

"V.dataBoxV.addValue(data02)"

worked fine!