Hello,

When I read the FPRGV3 for SRV PI Loop, I have a few questions...
I an curious about how to read the Z-1 and PI Loop.
Especially I am wondering how to calculate the value of "REF_OUT"

Thank you.

 

-1
Z means the last result of the calculation.

The "picture" is a graphical representation of a pressure calculation. The basic formula is ((TNH*Gain)+Offset)) with some modifiers and upper- and lower-limit clamps. L3GRV is usually a logic "1" when starting and running on or transferring to gas fuel. I'm not familiar with the P2 "subtraction" or the TC component (which I presume is some kind of temperature correction).

You may find more information in the Control Specification for the machine--it's the best to look for more information, but it may or may not be there. When you right-click on the block (I'm presuming it's a Mark* VI or Mark* VIe) is 'Item Help' or 'Block Help' greyed-out or available? If it's available, what happens when you click on it?