TSTQ Module 1,01,02 Block 1000 tests Module 1,01,02 Block 1001 (FC 67), which is not propagating quality

This message tells you that a TSTQ: Test Quality [FC31] block is being used to test a signal that has no quality to propagate. The input will never be found to have bad quality and no action will happen that might be intended. This often shows a situation where an AO/L FC 30 block is being tested for quality, but the input signal has no quality to propagate.

Signals that have quality are represented in DBDOC as blue or purple lines on CAD and CLD diagrams. Function codes that have quality or propagate the quality of their input are listed at Function codes with quality.

This message sometimes appears where macros have been taken to implement logic, so it might not be an error. However, we often find such oversights as testing the quality of an Analog Transfer function block instead of its input, or the quality of a digital logic block rather than the inputs or outputs to the block.

--Generating Effective Quality report...
TSTQ Module 1,02,10 Block 6030 tests Module 1,02,10 Block 5615 (FC 67), which is not propagating quality

It is very important to note that this error will only cause a problem when a signal that is counted upon goes bad quality and the logic fails to detect that problem. It was missed in checkout and commissioning, or in subsequent work because it cannot be tested validly.

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.