68 Rockwell Automation Publication 1756-UM058G-EN-P - November 2012
Chapter 4 Diagnostic Module Features
Diagnostic Output
Module Compatibility
ControlLogix diagnostic output modules are capable of directly driving the
ControlLogix diagnostic digital inputs. When diagnostics are used, a shunt
resistor is required for leakage current.
For more information on the compatibility of motor starters with ControlLogix
output modules, see Appendix
E.
Diagnostic Features
The table below lists features common to all ControlLogix diagnostic digital I/O
modules.
Diagnostic I/O modules also have the common module features
described in Chapter 3
.
Diagnostic Latch of Information
Diagnostic latching allows diagnostic I/O modules to latch a fault in the set
position once it has been triggered, even if the error condition causing the fault to
occur disappears.
The Point column on the left side of the Configuration tab lets you set diagnostic
latching to occur for a specific point where the field device is wired to the I/O
module.
Follow these steps to enable or disable diagnostic latching.
1. On the Module Properties dialog box, click the Configuration tab.
Topic Page
Diagnostic Latch of Information 68
Diagnostic Timestamp 69
8-Point AC/16-Point DC 70
Point-level Fault Reporting 70
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