Rockwell Automation Publication 1756-UM013B-EN-P - October 2019 117
Module Tag Definitions Appendix B
1756-OBV8S Module Tags
This section describes the tags that are associated with the 1756-OBV8S module.
Input Tags
Tab le 6 describes the 1756-OBV8S module input tags.
Table 6 - 1756-OBV8S Module Input Tags
Name Data Type Definition Valid Values Available With These
Input Data Type Choices
RunMode BOOL Module’s operating state • 0 = Idle
•1 = Run
Safety Data
Safety Packed Data
ConnectionFaulted BOOL Indicates if a connection is running.
The module sets this tag to 0 when connected. If
the module is not connected, the controller
overwrites the tag to 1.
• 0 = Connection is working
• 1 = Connection is not working
Safety Data
Safety Packed Data
DiagnosticActive BOOL Indicates if any diagnostics are active or if the
prognostics threshold is reached.
• 0 = No diagnostics active
• 1 = One or more diagnostics are active or
the prognostics threshold is reached
Safety Data
Safety Packed Data
Uncertain BOOL Indicates that the channel data can be inaccurate
but the degree of inaccuracy is not known.
For more information, see Module Data
Quality Reporting on page 40.
• 0 = Good data
• 1 = Uncertain data
This tag is set to 1 when the module has
reached a critical operating temperature
or is higher the acceptable operating
temperature.
IMPORTANT: Once the condition that
causes the tag to change to 1 is removed,
the tag automatically resets to 0.
Safety Packed Data
DiagnosticSequenceCount SINT Increments for each time a distinct diagnostic
condition is detected, and when a distinct
diagnostic condition transitions from detected to
not detected.
Set to zero by product reset or power cycle. Wraps
from 255 (-1) to 1 skipping zero.
• 1…255 Safety Data
Safety Packed Data
Ptxx.Readback BOOL Indicates that a 24V DC power source is connected
to the output circuit
• 0 = 24V DC power is not present
• 1 = 24V DC power is present
Safety Data
Safety Packed Data
Ptxx.Fault BOOL Indicates one of the following:
• The channel data is inaccurate and cannot be
trusted for use in the application.
For more information, see Module Data
Quality Reporting on page 40.
• The channel is set to Not Used.
• 0 = Good data
• 1 = Bad data (faulted) or set to Not Used
If the tag is set to 1, you must
troubleshoot the module to correct the
cause of the inaccuracy.
IMPORTANT: Once the condition that
causes the tag to change to 1 is removed,
you must complete the steps described
in Safety Output Fault Reset on page 63
to reset this tag to 0.
(1)
If the tag is 1 because the channel is set
to Not Used, no action is required.
Safety Data
Ptxx.Uncertain BOOL Indicates that the channel data can be inaccurate
but the degree of inaccuracy is not known.
For more information, see Module Data
Quality Reporting on page 40.
• 0 = Good data
• 1 = Uncertain data
This tag is set to 1 when the module has
reached a critical operating temperature
or is higher the acceptable operating
temperature.
IMPORTANT: Once the condition that
causes the tag to change to 1 is removed,
the tag automatically resets to 0.
Safety Data
Ptxx.ShortCircuit BOOL Indicates a short circuit • 0 = No short circuit
•1 = Short circuit
Safety Data
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