Download ControlLogix Digital I/O Modules

ControlLogix Diagnostic Digital I/O Module Features
4-29
Field Power Loss Detection
This feature is used when field power to the module is lost or zero
cross cannot be detected. A point level fault is sent to the controller to
identify the exact point faulted.
IMPORTANT
Only enable Field Power Loss detection for points
that are in use. If this feature is enabled for points
that are not in use, you will receive faults for those
points during operation.
This feature has a corresponding tag that can be examined in the user
program in the event of a fault. For more information on these tags,
see Appendix A.
Enable Field Power Loss Detection as shown below.
Enable and disable field power loss
detection on the Configuration tab.
• Check the box to enable
field power loss detection.
• Clear the box to disable
field power loss detection.
For an example of how to enable the Field Power Loss detection
diagnostic, see page 6-12.
Preliminary Publication 1756-UM058D-EN-P - October 2004