Module Data Quality Reporting
The module indicates the quality of data that is returned to the owner-controller. Levels
of data quality are reported via input tags.
The following inputs tags indicate the level of data quality.
IMPORTANT:
Once the condition that causes the Fault or Uncertain tag to change to 1 is
removed, the tag automatically resets to 0. The Studio 5000 Logix Designer
application controls the tags. You cannot change the status of the tags. Keep in
mind that in some system configurations, the tag is not reset immediately after
the condition is removed. The tag typically resets after a small delay.
- Fault – When the fault bit is set, this tag indicates that the reported data is inaccurate and cannot be trusted for use in your application. Do not use the reported data for control.If the tag is set to 1, you must troubleshoot the module to correct the cause of the inaccuracy.Example causes of inaccurate data for digital outputs include the following:
- Channel fault
- Field Power Loss condition
- Short circuit condition
TIP:You should troubleshoot the module for the typical causes first. - Uncertain – This tag indicates that the reported data can be inaccurate but the degree of inaccuracy is unknown. We recommend that you do not use the reported data for control.If the tag is set to 1, you know that the data can be inaccurate. You must troubleshoot the module to discover what degree of inaccuracy exists.An example cause of uncertain data is the counter input signal frequency is outside its designed operating range.TIP:You should monitor the tags in your program to make sure that the application is operating as expected with accurate data.
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