Same-bus input Module 1,01,02 Block 12455 (FC 45) attempts to read value in other PCU 3

This message tells you that an IREF (Input Reference) exists in the Composer project. However, the function block cannot import it, because it is outside the scope of what it can import.

For example, if a Bus Import (AI/B, DI/B, AIL/B or DIL/B function) has a refererence in a different PCU, you will see this error. These functions can only import blocks from the same PCU, so the reference text is flawed if it in a different PCU.

--Parsing file H:\...\EBY45EB.CLD... CAD Names: 2300251A.CAD
External output reference is unreachable for IREF **1AOIK CB CLSD on Module 2,30,02 Block 1652:
cannot import from Loop 2 PCU 20.

Here is the actual source, as determined by the specifications.

Here is the source that the input reference indicates.

--Parsing file H:\...\EBY3DAC.CLD... CAD Names: 2320454A.CAD
External output reference is unreachable for IREF L30D_MSG on Module 

2,32,04 Block 1584: cannot import from Loop 2 PCU 22."

Here is the block that is being imported.

Here is the source indicated by the input reference L30D_MSG.

It is possible to see how Composer, in being robust enough to import files from WinCAD, also allows errors to persist in the input references.

This message is likely to show an error in the system configuration. It should be reviewed. The issue raised may be in unused logic or graphics, or have other realities that make it a non-issue.

Please contact us for help resolving your error messages.