Module Data Quality Reporting

The module indicates the quality of channel data that is returned to the owner-controller. Levels of data quality are reported via module input tags.
IMPORTANT:
Once the condition that causes the
Fault
 or
Uncertain
 tag to change to 1 is removed, the tag automatically resets to 0. You cannot change the status of the tags. The Studio 5000 Logix Designer application controls 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.
The following inputs tags indicate the level of data quality.
  • Fault – When the
    Fault
     tag is set, it indicates that the reported channel data is inaccurate and cannot be trusted for use in your application. Do not use the reported channel data for control. If the tag is set to 1, you must troubleshoot the module to correct the cause of the inaccuracy.
  • Uncertain – When the
    Uncertain
     tag is set, it indicates that the reported channel data can be inaccurate but the degree of inaccuracy is unknown. Do not use the reported channel data for control.
Fault and Uncertain Tags Causes
Channel Communication Mode
Tag Name
Causes
Generic ASCII
Ix.ASCII.Fault
The causes of inaccurate data include the following:
  • SA power loss
  • Transmitted data loss
  • Received data loss
  • Handshake error
  • Invalid transmitted data length
  • Invalid received data length
Ix.ASCII.Uncertain
None
Modbus Master
Ixx.Fault
SA power loss
Ixx.Uncertain
Any Modbus command uncertain
Modbus Slave
Ix.Slave.Fault
SA power loss
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