mixing valves ao module

[valuzza]

Hello everyone!

I am experiencing a problem in controlling 2 mixing valves with cFP 2100. Both valves are supplied by aone24V external supply and are driven by a 0-10Vsignal or 4-20mA signal. COM port for the driving signal is obviously the same than COM of supply voltage.

I have tried to:

-connect both of them to AO-210 voltage AO module

-one to AO-210 voltage and one to AO-200 current module.

In either case, if I write just on one of the channels (command just one valve) it works fine, but when I try to control both of them at the same time...problems start: signals of both of them start fluctuating all time, like there is some sort of interference. Is there any way I can try and solve my issue?

Thank you in advance,

Valeria

[James.M]

Please include a Snippet of your code, or attach your VIs, so that we can better assist you. We can only speculate based on what you've told us and the issue could be many things.