PID Module 1,01,02 Block 1002 uses derivative with PV from discontinuous input Module 1,01,02 Block 1003

PID Module 4,02,02 Block 1425 uses derivative with PV from discontinuous input Module 4,02,02 Block 6188. Intermediate blocks: Module 4,02,02 Block 1403 [40202G6] This PID (or APID) block has a non-zero derivative spec and input from a discontinuous source.

These messages are generated if FC18 or FC19 have S8 adapted or not equal to 0, or FC 156 has S14 adapted or not equal to 0, and tracing back the source of S1 through up to 6 intermediate blocks, there are potential discontinuous sources such as FC26, FC47, FC93, FC114, FC121, FC137, FC165, or FC178.

PID and APID algorithms should never use a derivative term if the PV is affected by an exception-reported input PV.

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.

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