Troubleshooting
7-9
TI545/TI555 System Manual
7.4 Troubleshooting Controller Non-Fatal Errors
Definitions
of non-fatal errors are listed in this section along with suggested
courses of action.
•
Scan overrun
—
The CPU scan time is not sufficient to execute the user
program.
•
I/O base failure — A configured base is not connected or has failed.
Check the I/O cabling and/or I/O configuration.
•
Special function port failure — A communication port on an SF module
has failed. Check all SF modules.
•
I/O module failure — A configured module is not present or is reporting
an error
. Run AUX 25 or see Appendix C to identify the module.
•
I/O table does not agree with modules installed — The configured I/O
does not match what is installed in the base. Check the I/O
configuration and/or run AUX 25.
NOTE:
Series 505 I/O modules with date codes before January 1988 cannot
be used with a TI545/TI555 CPU. See Appendix C for details.
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