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[Paul-Reed]

@HYPER

I'm not sure what that would look like in my contex....

I've pointed you in the right direction & included an example flow, but I don't intend to write the code for you...
Especially if you are developing a flow to shut down a fuel cell in a emergency situation, you need to be confident that it will work as intended.
The javascript in your function node falls well short, and a lot of work is needed for this to work as intended.

Good luck

Paul