LabVIEW
String array by VISA write
Your workflow will look like this:
- Auto-index the next element.
- Do your bit-wise operations.
- Concatenate your string.
- Send the string via VISA Write.vi.
- Wait for 250 ms. then read the reply using VISA Read.vi.
- Auto-index the results.
- Repeat until the input array has been completely auto-indexed (this is automatic).
- Work on the data array outside the loop.
A hard-coded wait followed by Bytes at Port property usually (99% of the time) indicates a failure to fully comprehend the actual communication protocols needed. I've only seen ONE case where the manufacturer actually recommended a wait of x ms to allow the instrument to process the command that was sent. Even then, Bytes at Port wasn't needed. Usually I see this method used when the developer takes code right out of the serial port example. Normally, copying the example is a good way to implement something, but in the case of the serial port example, well... IMHO it needs to be replaced.
@Antonio81 wrote:
Any way your steps about my project are correct.
My issue is that I don't find way to contacted the Loop output to Write Visa input.
Do you have any solutions?
Your Write and Read process should be inside of the FOR loop.
@Antonio81 wrote:
Actually I used Bytes Port in other project and I never had problems.
You just got lucky. You WILL run into issues when using an arbitrary wait with the Bytes At Port. Use the messaging protocol to find your data.
