LabVIEW
Multiple value request from a device
Solved!
Is there some information about the communications protocol? I see only a brief description at the end regarding option C5 (which I guess you have already) which gives information about rates, stop bits and so on.
Since you get one result, your difficulty probably isn't communication. I would guess it is related to the input number of Bytes, but I'm not sure.
Where did you find the hex codes you're sending to get the values?
Ah - I see.
I don't think that you can, without reading from 0001 (the first value, SV1) to 0080 (PV) and getting all values in between, then parsing them all. I think reading them separately, one after the other is best.
Do you need to use RTU mode because of high rate or other instruments? If not, using the ASCII mode and having a termination character might be much easier.
If you need to use RTU, you should do what you have now, but just use one after the other. The RTU mode requires a wait of 3.5 character times between each mode, which makes it a little more complicated. With ASCII, you can use VISA Read with the termination character set to LF (0A, the default) and it will give you one message at a time.
The Flat Sequence will mean that left happens before right, but you shouldn't need to use it - if you connect the error wires then they have to happen in the order they are wired anyway.
A common use of the flat sequence structure is to place a wait at a certain time, which you might need to do. You could do that like this...
(I don't know how long you should wait though...)
I'm not certain it will work, because I'm not familiar with RTU or the Bytes at Port node (typically the advice is to avoid this and use a termination character, like you see in the ASCII commands) but perhaps you can try this VI?
