MAN0878-09-EN_XLE_XLT_UserManual
A u g u s t 2 3 , 2 0 1 8
P a g e 151 | 158
20.2 Local Controller and Local I/O
The System Menu provides the following status indications that are useful for troubleshooting
and system maintenance.
•
Self-test results, diagnostics.
•
RUN and OK status
•
Network status and usage
•
Average logic scan rate
•
Application memory usage
•
Loaded firmware versions
•
Loaded protocols
•
Removable media access
To view the system menu, press the UP and DOWN arrow keys simultaneously. See
Chapter 9
for full details on the System Menu diagnostic capabilities.
20.2.1 Local I/O Troubleshooting Checklist
1.
Verify the controller is in RUN mode.
2.
Check diagnostics to ensure controller passed self-tests.
View Diags in System Menu or in Cscape, click; Controller/Diagnostics
3.
Check data sheets to ensure proper wiring.
4.
Ensure that hardware jumpers and software configuration for I/O match.
5.
Check data sheets for voltage and current limits.
6.
Take ladder out of the picture. From Cscape set
controller to “Do I/O” mode. In this
mode inputs can be monitored, and outputs set from a data watch window in Cscape
without interference from the ladder program. Some I/O problems are only a result
of a mistake in the ladder program.
WARNING: Setting outputs ON in Do I/O mode can result in injury or cause
machinery to engage in an unsafe manner depending on the application and the
environment
.
