STAR
TUP / TROUBLESHOOTING
5-15
Hardware
and Installation User Manual
Attempt
to clear the fatal error by following the steps listed below
. When the PC
GOOD
LED turns on, the fatal error has been cleared.
1. Determine
the fatal error condition by selecting AUX Function 29 from
the Auxiliary Function Menu on your programming unit. Record the
fatal and non-fatal error(s) listed along with the date, time, and PLC
serial
number for later reference.
NOTE
Always
execute AUX
Function 29 and make a list of
the errors before attempting to clear them. If you
clear
errors before listing them, it will be impossible
to determine what errors occurred and difficult to
identify
the problem that caused them.
If communication errors occur, cycle power to the PLC. If
communication errors continue, record “No Communication” as the
fatal
error and go to step 4.
2. Execute
AUX Function 1
1 —
PLC partial restart. If this fails to clear the
error,
execute AUX Function 12 — PLC complete restart.
3. If the fatal error persists, make certain that the battery backup is
enabled
and execute AUX Function 10 — PLC power
-up restart.
4. If you have been unable to clear the fatal error to this point, you must
re-initialize
the PLC.
This
clears the PLC memory
.
For
a TI535, disable
the battery backup (turn off switch 1 of DIP 2) and
cycle
power to the PLC (or execute AUX Function 10).
For a TI525, power down and remove the PLC from the base. Disable
the battery backup (turn off switch 1 of DIP 2), insert the PLC in the
base,
and power up.
5.
If the PC GOOD LED comes on, restore the battery backup by turning
on switch 1 of DIP 2. (For a TI525, you must power down again and
remove the PLC from the base to re-enable battery backup.) You must
now
use your programming unit to restore your program.
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