Problem reading flow with Brooks MFCs via RS232

[Blokk]

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@Maferrar wrote:

Sorry you were right, the communication is actually a RS-485. 

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What do you mean? That you already use RS485, or you SHOULD use RS485? 🙂

[Maferrar]

That I already use RS485 as communication.

[Blokk]

Put together a small test VI using those company provided subVIs.

Do proper error reporting. Make it simple, init the com, then set a setpoint, and finally read the flow in a while loop at every sec or so, something similar to my example snippet.

Test this vi. Do you see errors? Also attach the vi here so we can have a look...

edit: also be sure you use proper cabling!

[Maferrar · Accepted solution]

I found that with the library Brooks DLL:

-you can write the set point in % or in units 

-you can read only in units  (i.e. m3/h)