Module Data Quality Reporting
The safety I/O modules indicate the quality of point data that is returned to the
owner-controller. Levels of data quality are reported via module input tags.
The following inputs indicate the level of data quality.
IMPORTANT:
Some faults are not recoverable, that is, the fault bit is not cleared, and some
faults are reset according to the
Ptxx.ResetFault
tag. 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.- I.Ptxx.Fault– When the fault bit is set, this tag indicates that the reported point data is inaccurate and cannot be trusted for use in your application. Do not use the reported point 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 include the following:
- Point not used
- Point fault
- Field Power Loss condition
TIP:You should troubleshoot the module for the typical causes first. - I.Ptxx.Uncertain– This tag indicates that the reported point data can be inaccurate but the degree of inaccuracy is unknown. We recommend that you do not use the reported point 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 module is operating 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 point input data.
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