Import information: AI/I Reference on drawing L8102AM-11 imports station PV from Module 21,28,06 Block 1880.
This message flags something that is not always known among INFI-90 specialists. Using an AI/I or AI/L reference to import an M/A MFC/P: Control Station [FC80] block yields not the OP value, but the PV (process value), the value on Spec 1.
Importing the output of a Station (FC 80, for example) brings the Process Value (PV) instead of the Output (OP). This can be misleading. We have found instances where the designer clearly intended to be importing the Output Value. You should verify any imports like this to make sure the PV is what is intended. The example tells a story because the error was corrected in one unit but not in its clone. Here we see the two units side by side. On the left is unit 1, where the error was corrected by adding block 9930. On the right is unit 2, which was cloned from unit 1 but the error was never corrected.
Here we see the AI/I references for units 1 and 2. Unit 1 on the left is importing from block 9930. Unit 2 on the right is still importing from S1 of block 1880.
Sometimes it is important to investigate not only why an error appeared in one unit, but why it didn't in another.
This message shows a potential error in the system configuration, although most such errors prove to be harmless. It should be reviewed and hidden, unless it shows an issue that should be addressed.
Please contact us for help resolving your error messages.
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