User manual

7–21
Chapter 7 – RUN Mode and Errors
LT Series User Manual
 CLOCK SETUP ERROR
This message displays when the power level of the lithium backup battery (the
battery used for the internal clock) is running low. To reset the error, you need to
turn the LT unit’s power OFF and then ON again. Let the LT run continuously for
24 hours to sufficiently charge the battery for backup, and for approximately 96
hours to fully charge the battery.
If the battery is incorrectly replaced, it may explode. To reduce the risk of danger,
do NOT replace the battery yourself. When the battery needs replacing, please
contact your local LT distributor.
After changing the backup battery, set up the internal clock.
Chapter 6 – “Initializing the LT”
The lifetime of the backup battery depends on the ambient
temperature and the amount of current being charged and
used. The table below gives a general indication of how long
the battery will last.
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 SCREEN TAG LIMIT EXCEEDED (max. 384 Tags)
When the number of Parts exceeds the 384–Tag limit, any extra Tags are disabled,
and the load screen operation is disabled when you try to load screens, beginning
with the screen you loaded last.
To correct this problem, reduce the number of Tags to within the allowed limit.
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 OBJ. PLC HAS NOT BEEN SET UP
The following error message is displayd when the PLC/external device you speci-
fied in the .PRW file transferred from LT Editor/C-Package to the LT unit does not
match the PLC/external device physically connected to the LT unit. When this
occurs, do the following. In LT Editor/C-Package, select [Setup/Transfer settings]
in the [Transfer] dialog box, and select [Automatic Setup], before transferring the
file again.
Battery Temperature 40° C or lower 50° C or lower 60° C or lower
Expected Lifetime 10 years or longer
4.1 years or longer 1.5 years or longer
OBJ. PLC HAS NOT BEEN SETUP ( x x )
The external device number
(Hexadecimal) as set up in the
LT Editor/C-Package.